Energy Fuels (UUUU) 10-K15 Mar 222021 FY Annual reportFinancial data

Company Profile

Cover Page

Cover Page - USD ($) $ in Thousands	12 Months Ended
Cover Page - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 10, 2022	Jun. 30, 2021
Entity Listings [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Entity Registrant Name	ENERGY FUELS INC.
Entity File Number	001-36204
Entity Incorporation, State or Country Code	Z4
Entity Tax Identification Number	98-1067994
Entity Address, Address Line One	225 Union Blvd., Suite 600
Entity Address, State or Province	CO
Entity Address, City or Town	Lakewood,
Entity Address, Postal Zip Code	80228
City Area Code	303
Local Phone Number	974-2140
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Title of 12(b) Security	Common Shares, no par value
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 886,200
Entity Common Stock, Shares Outstanding (in shares)		156,707,285
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001385849
Amendment Flag	false
NEW YORK STOCK EXCHANGE, INC.
Entity Listings [Line Items]
Trading Symbol	UUUU
Security Exchange Name	NYSEAMER
TORONTO STOCK EXCHANGE
Entity Listings [Line Items]
Title of 12(b) Security	Common shares, no par value

Audit Information

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2021
Audit Information [Abstract]
Auditor Name	KPMG LLC
Auditor Location	Denver, CO
Auditor Firm ID	185

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Rare Earth concentrates	$ 1,385	$ 0	$ 0
Revenues, Vanadium Concentrates	74	0	2,237
Revenues, Uranium Concentrates	0	0	66
Alternate Feed Materials processing and other	1,725	1,658	3,562
Total revenues	3,184	1,658	5,865
Costs and expenses applicable to Uranium concentrates	0	0	63
Cost of Revenue, Applicable To Vanadium Concentrates	48	0	1,805
Cost of Revenue, Rare Earth Concentrates	1,235	0	0
Costs and expenses applicable to Alternate Feed Materials and other	0	0	2,079
Underutilized capacity production costs applicable to Rare Earth concentrates	531	0	0
Total costs and expenses applicable to revenues	1,814	0	3,947
Impairment of inventories	0	1,644	14,351
Development, permitting and land holding	10,750	4,333	9,180
Standby costs	9,462	4,015	2,584
Accretion of asset retirement obligation	1,284	1,911	1,931
Selling costs	44	38	190
General and administration	15,255	14,344	14,263
Total operating loss	(35,425)	(24,627)	(40,581)
Gain on disposal of non-core assets	35,733	0	0
Interest expense	(54)	(952)	(1,491)
Other income (loss)	1,194	(2,293)	3,978
Net income (loss)	1,448	(27,872)	(38,094)
Items that may be reclassified in the future to profit and loss
Foreign currency translation adjustment	(365)	(681)	(854)
Other comprehensive loss	(365)	(681)	(854)
Comprehensive income (loss)	$ 1,083	$ (28,553)	$ (38,948)
Basic Net (loss) income per share (in dollars per share)	$ 0.01	$ (0.23)	$ (0.40)
Net income (loss) attributable to:
Owners of the Company	$ 1,541	$ (27,776)	$ (37,978)
Non-controlling interests	(93)	(96)	(116)
Net income (loss)	1,448	(27,872)	(38,094)
Comprehensive income (loss) attributable to:
Owners of the Company	1,176	(28,457)	(38,832)
Non-controlling interests	(93)	(96)	(116)
Comprehensive income (loss)	$ 1,083	$ (28,553)	$ (38,948)
Diluted Net (loss) income per share (in dollars per share)	$ 0.01	$ (0.23)	$ (0.40)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 112,517	$ 20,168
Marketable securities	494	2,247
Trade and other receivables, net of allowance for credit losses of $223 and $223, respectively	3,954	1,169
Inventories, net	30,772	27,575
Prepaid expenses and other assets	1,568	1,313
Total current assets	149,305	52,472
Inventories, net	1,368	1,346
Operating lease right of use asset	408	662
Investments accounted for at fair value	38,538	779
Property, plant and equipment, net	21,983	23,621
Mineral properties, net	83,539	83,539
Restricted cash	20,305	20,817
Total assets	315,446	183,236
Current liabilities
Accounts payable and accrued liabilities	5,764	3,321
Current portion of operating lease liability	324	289
Current portion of warrant liabilities	0	8,573
Current portion of asset retirement obligation	27	131
Total current liabilities	6,115	12,314
Operating lease liability	145	469
Asset retirement obligation	13,660	12,907
Total liabilities	19,920	25,690
Equity
Share capital Common shares, without par value, unlimited shares authorized; shares issued and outstanding 156,262,199 at December 31, 2021 and 134,311,033 at December 31, 2020	685,903	549,317
Accumulated deficit	(396,271)	(397,812)
Accumulated other comprehensive income	1,943	2,308
Total shareholders' equity	291,575	153,813
Non-controlling interests	3,951	3,733
Total equity	295,526	157,546
Total liabilities and equity	315,446	183,236
Commitments and contingencies (Note 18)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for credit loss	$ 223	$ 223
Common stock, shares, issued (in shares)	156,262,199	134,311,033
Common Stock, Shares, Outstanding (in shares)	156,262,199	134,311,033

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Deficit	Accumulated other comprehensive income	Total shareholders' equity	Non-controlling interests
Beginning Balance (in shares) at Dec. 31, 2018		91,445,066
Beginning Balance at Dec. 31, 2018	$ 144,854	$ 469,303	$ (332,058)	$ 3,843	$ 141,088	$ 3,766
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) for the period	(38,094)		(37,978)		(37,978)	(116)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(854)			(854)	(854)
Shares Issued For Cash By At The Market Offering Shares		8,043,365
Shares Issued For Cash By At The Market Offering	20,141	$ 20,141			20,141
Stock Issuance Costs	(463)	(463)			(463)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	3,771	$ 3,771			3,771
Effect of shares issued for conversion of Convertible Debentures		266,272
Shares issued for exercise of share purchase warrants	847	$ 847			847
Shares Issued for Consulting Services		74,781
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	$ 208	$ 208			208
Shares issued for the vesting of restricted stock units (in shares)	786,746	850,150
Contributions attributable to non-controlling interest	$ 46					46
Shares issued for public offering (in shares)		54,805
Shares issued for consulting services	46,067
Adjustments to Additional Paid in Capital, Warrant Issued	$ 5	$ 5			5
Stock Issued During Period, Value, Stock Options Exercised	$ 146	$ 146			146
Stock Issued For Exercise Of Warrants	1,057	1,450
Ending Balance (in shares) at Dec. 31, 2019		100,735,889
Ending Balance at Dec. 31, 2019	$ 130,607	$ 493,958	(370,036)	2,989	126,911	3,696
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) for the period	(27,872)		(27,776)		(27,776)	(96)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(681)			(681)	(681)
Shares Issued For Cash By Public Offering Shares		11,300,000
Shares Issued For Cash By Public Offering Amount	16,611	$ 16,611			16,611
Shares Issued For Cash By At The Market Offering Shares		21,361,784
Shares Issued For Cash By At The Market Offering	38,109	$ 38,109			38,109
Stock Issuance Costs	(2,330)	(2,330)			(2,330)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	2,598	$ 2,598			2,598
Shares Issued for Consulting Services		120,000
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	$ 188	$ 188			188
Shares issued for the vesting of restricted stock units (in shares)	452,932	490,453
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	$ 415	$ 415			415
Contributions attributable to non-controlling interest	$ 133					133
Shares issued for public offering (in shares)		302,707
Shares issued for consulting services	74,672
Adjustments to Additional Paid in Capital, Warrant Issued	$ 1	$ 1			1
Stock Issued During Period, Value, Stock Options Exercised	$ 597	$ 597			597
Stock Issued For Exercise Of Warrants	0	200
Ending Balance (in shares) at Dec. 31, 2020		134,311,033
Ending Balance at Dec. 31, 2020	$ 157,546	$ 549,317	(397,812)	2,308	153,813	3,733
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss) for the period	1,448		1,541		1,541	(93)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(365)			(365)	(365)
Shares Issued For Cash By At The Market Offering Shares		16,627,512
Shares Issued For Cash By At The Market Offering	108,653	$ 108,653			108,653
Stock Issuance Costs	(2,445)	(2,445)			(2,445)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	2,158	$ 2,158			2,158
Shares Issued for Consulting Services		47,393
Adjustments to Additional Paid-in-Capital, Shares Issued For Consulting Services	$ 242	$ 242			242
Shares issued for the vesting of restricted stock units (in shares)	443,364	478,781
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	$ 256	$ 256			256
Contributions attributable to non-controlling interest	$ 311					311
Shares issued for public offering (in shares)		775,814
Shares issued for consulting services	35,933
Adjustments to Additional Paid in Capital, Warrant Issued	$ 26,603	$ 26,603			26,603
Stock Issued During Period, Value, Stock Options Exercised	$ 2,290	2,290			2,290
Effect of stock options exercised	5,643
Stock Issued During Period, Value, Cash Payment for Tax Withholding	$ 659	$ 659			659
Stock Issued For Exercise Of Warrants	1,737,981	4,016,023
Ending Balance (in shares) at Dec. 31, 2021		156,262,199
Ending Balance at Dec. 31, 2021	$ 295,526	$ 685,903	$ (396,271)	$ 1,943	$ 291,575	$ 3,951

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES
Net income (loss) for the period	$ 1,448	$ (27,872)	$ (38,094)
Items not involving cash:
Depletion, depreciation and amortization	3,189	2,701	1,213
Share-based compensation	2,158	2,598	3,771
Gain on disposal of non-core assets	(35,733)	0	0
Change in value of Convertible Debentures	0	(156)	(291)
Change in value of warrant liabilities	8,078	5,436	(3,726)
Accretion of asset retirement obligation	1,284	1,911	1,931
Unrealized foreign exchange (gain) loss	129	(1,045)	78
Revision and settlement of asset retirement obligation	(369)	(7,845)	(1,421)
Impairment of inventories	0	1,644	14,351
Other non-cash (income) expenses	(6,893)	(707)	2,314
Changes in assets and liabilities
Increase in inventories	(3,219)	(6,100)	(18,534)
(Increase) decrease in trade and other receivables	(1,249)	192	(63)
(Increase) decrease in prepaid expenses and other assets	(257)	149	12
Increase (decrease) in accounts payable and accrued liabilities	2,140	(3,084)	(3,195)
Changes in deferred revenue	0	0	(2,724)
Net cash used in operating activities	(29,294)	(32,178)	(44,378)
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(1,368)	(627)	0
Maturities and sales of marketable securities	2,554	4,208	22,575
Disposal of non-core assets	2,000	0	0
Net cash provided by investing activities	3,186	3,581	22,575
FINANCING ACTIVITIES
Issuance of common shares for cash, net of issuance costs	106,208	52,390	19,678
Proceeds from notes payable	0	0	801
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	(538)	(415)	0
Cash received from exercise of stock options	2,375	491	146
Cash received from exercise of warrants	9,840	0	5
Cash paid to settle and fund employee income tax withholding due upon exercise of stock appreciation rights	(256)	0	0
Repayment of loans and borrowings	0	(16,015)	(317)
Cash received from non-controlling interest	311	133	46
Net cash provided by financing activities	117,940	36,584	20,359
Effect of exchange rate fluctuations on cash held in foreign currencies	5	107	43
Net change in cash, cash equivalents and restricted cash	91,837	8,094	(1,401)
Cash, cash equivalents and restricted cash, beginning of period	40,985	32,891	34,292
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	132,822	40,985	32,891
Capital Expenditures Incurred but Not yet Paid	182	0	0
Non-cash investing and financing transactions:
Issuance of common shares to settle liabilities	0	0	847
Issuance of common shares for consulting services	242	188	208
Interest	54	952	1,491
Warrant liability transferred to equity upon exercise	$ 0	$ 0	$ 2

THE COMPANY AND DESCRIPTION OF

THE COMPANY AND DESCRIPTION OF BUSINESS	12 Months Ended
THE COMPANY AND DESCRIPTION OF BUSINESS	Dec. 31, 2021
Accounting Policies [Abstract]
The Company and Description of Business	THE COMPANY AND DESCRIPTION OF BUSINESS Energy Fuels Inc. was incorporated under the laws of the Province of Alberta and was continued under the Business Corporations Act (Ontario). The Company is engaged in uranium extraction, recovery and sales of uranium from mineral properties and the recycling of uranium bearing materials generated by third parties. As a part of these activities the Company also acquires, explores, evaluates and, if warranted, permits uranium properties. The Company’s final uranium product, U 3 O 8 , is sold to customers for further processing into fuel for nuclear reactors. The Company also produces vanadium, along with uranium at its White Mesa Mill, from certain of its Colorado Plateau properties as market conditions warrant and at times from solutions in its Mill tailings impoundment system. The Mill is also currently ramping up to commercial production of RE Carbonate from various uranium- and REE-bearing ores acquired from 3 rd parties, and is additionally evaluating the potential to recover radioisotopes from its existing process streams for use in targeted alpha therapeutics to treat cancer. The Company is a “development stage issuer” as defined by S-K 1300, as it is engaged in the preparation of Mineral Reserves for the extraction on at least one material property. Energy Fuels is engaged in conventional and ISR uranium extraction and recovery, along with the exploration, permitting and evaluation of uranium properties in the United States. Mining activities Mining activities consist of the Mill, conventional mining projects and two ISR mining projects (complete with two ISR recovery facilities on standby and two wellfields). The conventional projects are located at the Colorado Plateau, Bullfrog, Arizona Strip, and Roca Honda Projects, all of which are in the vicinity of the Mill, in addition to the Sheep Mountain Project located in Wyoming. ISR projects include the Nichols Ranch Project (which includes the Jane Dough Property and the Hank Satellite Plant) located in Wyoming and the Alta Mesa ISR Project (the “ Alta Mesa Project ”) located in Texas, both of which are on standby. At December 31, 2021, other than evaluation work and infrastructure improvements and development at the Company’s Pinyon Plain Project, the conventional mining projects in the vicinity of the Mill and Sheep Mountain are on standby, and are being evaluated for continued mining activities and/or are in the process of being permitted. The Mill has completed its most recent vanadium campaign, continues to process third-party uranium-bearing mineralized materials from mining and recycling activities, such as the Mill’s alternate feed program, and continues to expand its U.S.-based REE initiatives and develop its cancer therapeutics initiatives.

BASIS OF PRESENTATION

BASIS OF PRESENTATION	12 Months Ended
BASIS OF PRESENTATION	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	BASIS OF PRESENTATION The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“ U.S. GAAP ”) and are presented in thousands of U.S. dollars (“ USD ”), except for share and per share amounts. Certain footnote disclosures, where indicated, have share prices that are presented in Canadian dollars (“ Cdn$ ”).

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Dec. 31, 2021
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Use of estimates The Company’s consolidated financial statements have been prepared in accordance with U.S. GAAP. The preparation of the Company's consolidated financial statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to expectations of the future price of uranium and estimates of recoverable mineral resources that are the basis for future cash flow estimates utilized in assessing fair value for business combinations and impairment calculations; the determination of whether an acquisition represents a business combination or an asset acquisition; the use of management estimates and assumptions related to environmental, reclamation and closure obligations; marketable securities and derivative instruments; and share-based compensation expense. Actual results may differ significantly from these estimates. Basis of consolidation These consolidated financial statements include the accounts of the Company together with subsidiaries controlled by the Company. Intercompany transactions, balances and unrealized gains on transactions between the Company and its subsidiaries are eliminated. The functional currency of the Company’s operations is the USD. Extracting and recovery activities while in the development stage The Company extracts or recovers mineralized uranium from mining activities, mill tailings pond solutions, and Alternate Feed Materials, resulting in saleable uranium concentrates from its Mill and, when operating, its Nichols Ranch and Alta Mesa ISR Projects. While the Company has established the existence of multiple Mineral Resources and extracts and processes saleable uranium from these operations, the Company has only established proven or probable Mineral Reserves, as defined under SEC S-K 1300, at its Sheep Mountain Project. While now in a development stage, the Company continues to expense most amounts that would normally be capitalized and subsequently depreciated or depleted over the life of Mineral Reserve-based mining operations on its material properties having only Mineral Resources. Items such as the construction of wellfields and related header houses, additions to recovery facilities and advancement of properties are expensed in the period incurred. As a result, the Company’s consolidated financial statements may not be directly comparable to the financial statements of mining companies in the development stage having multiple Mineral Reserves or in the production stage. The Mill, and certain conventional mining projects in the vicinity of the Mill, and the Nichols Ranch Project (collectively the “ Extracting and Recovery Operations ”) were acquired in two unrelated business combinations. These Extracting and Recovery Operations were recorded at fair value on the date of the respective acquisition and included estimated values which included valuing these assets utilizing the Company’s estimate of future market prices of uranium and expected recoveries of uranium. The values determined included estimated cash flows associated with value beyond proven and probable reserves to develop, extract and recover the estimated saleable uranium concentrates from these operations. The fair value of the Extracting and Recovery Operations recorded on the acquisition date is depreciated on a straight-line basis over the estimated useful life of the components of the operation since the Extracting and Recovery Operations do not have proven or probable reserves. Accordingly, all expenditures incurred subsequent to the acquisition dates relating to the preparation of properties for mineral extraction, expansion of or additions to the Extracting and Recovery Operations are expensed as incurred. This includes expenditures relating to activities such as preparing properties for mineral extraction, construction of mine wellfields, header houses and disposal wells, and additions to the recovery facilities are expensed as incurred as no proven or probable reserves have been established for these uranium projects. Impairment of assets The Company reviews and evaluates its long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Mineral properties are monitored for impairment based on factors such as mineral prices, government regulation and taxation, the Company's continued right to explore the area, exploration reports, assays, technical reports, drill results and its continued plans to fund exploration programs on the property. At each reporting date, the Company reviews its assets to determine whether there is any indication of impairment. If any such indication exists, the asset is tested for impairment. Impairment losses are recognized in profit or loss. Recoverability is measured by comparing the undiscounted future net cash flows to the net book value. When the net book value exceeds future net undiscounted cash flows, the fair value is compared to the net book value and an impairment loss may be measured and recorded based on the excess of the net book value over fair value. Fair value for operating mines is determined using a combined approach, which uses a discounted cash flow model for the existing operations and non-operating properties with available cash flow models and a market approach for the fair value assessment of non-operating and exploration properties where no cash flow model is available. Future cash flows are estimated based on quantities of recoverable mineralized material, expected uranium prices (considering current and historical prices, trends and estimates), production levels, operating costs, capital requirements and reclamation costs, all based on life-of-mine plans. In estimating future cash flows, assets are grouped at the lowest level, for which there are identifiable cash flows that are largely independent of future cash flows from other asset groups. The Company's estimates of future cash flows are based on numerous assumptions, and it is possible that actual future cash flows will be significantly different than the estimates, as actual future quantities of recoverable minerals, uranium prices, production levels, costs and capital are each subject to significant risks and uncertainties. Cash and cash equivalents Cash and cash equivalents consist of all cash balances and highly liquid investments with an original maturity of three months or less. Because of the short maturity of these investments, the carrying amounts approximate their fair value. Restricted cash is excluded from cash and cash equivalents and is included in other current or long-term assets, depending on the nature of the restriction. See Note 10 for further discussion of restricted cash. Marketable securities Marketable debt securities consist of excess cash invested in U.S. government notes, U.S. government agencies and tradeable certificates of deposits. We have classified and accounted for our marketable debt securities as available-for-sale. After consideration of our risk versus reward objectives, as well as our liquidity requirements, we may sell these debt securities prior to their stated maturities. As we view these securities as available to support current operations, we classify highly liquid securities with maturities beyond 12 months as current assets under the caption marketable securities on the Consolidated Balance Sheet. Subsequent to initial recognition, they are measured at fair value and changes therein, are recognized as a component of other (loss) income in the Consolidated Statements of Operations and Comprehensive Income (Loss). Marketable equity securities consist of investments in publicly traded equity securities. We have classified and accounted for our marketable equity securities as available for sale. Subsequent to initial recognition, they are measured at fair value and changes therein are recognized as a component of other (loss) income in the Consolidated Statements of Operations and Comprehensive Income (Loss). Accounts Receivables Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company evaluates its estimate of expected credit losses based on historical experience and current and forecasted future economic conditions for each portfolio of customers. As of December 31, 2021 and 2020, the Company did not have an allowance for expected credit losses for trade accounts receivable. Investments at fair value The Company accounts for investments over which the Company exerts significant influence, but not control, over the financial and operating policies through the fair value option of ASC Topic 825 – Financial Instruments. The Company elects the fair value option based on practical expedience, variances in reporting timelines, and cost-benefit considerations. The cost of such investments is measured at the fair value of the assets given up, shares issued, or liabilities assumed at the date of acquisition plus costs directly attributable to the acquisition. Subsequent to initial recognition, they are measured at fair value. The fair value of the investee’s Common Shares is measured based on its closing market price. The Company uses the Black-Scholes option pricing model to estimate the fair value of its investment in warrants with the following assumptions: (i) the investee’s closing market price on the valuation date, (ii) the risk-free interest rate computed based on the U.S. Treasury yield, (iii) an expected term equal to the remaining contractual term, (iv) a dividend yield of zero, and (v) the expected stock price volatility calculated based on the historical volatility of the Common Shares of the investee. Changes in the fair value of these investments are recognized in Other income (loss) in the Company’s Consolidated Statements of Operations and Comprehensive Income (Loss). At December 31, 2021 and 2020, investments at fair value included the Company's 14.8% and 16.5% investment in Virginia Energy Resources Inc. (“ Virginia Energy ”), respectively, and at December 31, 2021, also included the Company’s 19.1% investment in CUR. Inventories Expenditures related to the extraction and recovery of uranium concentrates and depreciation of the acquisition cost of the Extracting and Recovery Operations are inventoried as stockpiles and in-process and concentrate inventories. Stockpiles are comprised of uranium or uranium/vanadium bearing materials that have been extracted from properties and are available for further processing. Extraction costs are added to the stockpile as incurred and removed from the stockpile based upon the average cost per ton of material extracted. The current portion of material in stockpiles represents the amount expected to be processed in the next twelve months. In-process and concentrate inventories include the cost of the material processed from the stockpile, as well as production costs incurred to extract uranium-bearing fluids from the wellfields, and all costs to recover the uranium into concentrates or process through the Mill. Finished uranium concentrate inventories also include costs of any finished product purchased from the market. Recovery costs typically include labor, chemical reagents and directly attributable mill and plant overhead expenditures. Materials and other supplies held for use in the recovery of uranium and vanadium concentrates are added to the costs of inventories when consumed in the uranium extraction process. Inventories are valued at the lower of average cost or net realizable value. Property, plant and equipment a. Recognition and measurement Property, plant and equipment are measured at cost less accumulated depreciation, and any accumulated impairment losses. Cost includes expenditures that are directly attributable to the acquisition of the asset. Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset, when it is replaced, and the cost of the replacement asset is expensed. b. Depreciation and amortization Depreciation and amortization are calculated on a straight-line basis to their estimated residual value over an estimated useful life which ranges from 3 to 15 years depending upon the asset type. When assets are retired or sold, the resulting gains or losses are reflected in current earnings as a component of other income or expense. Residual values, method of depreciation and useful lives of the assets are reviewed at least annually and adjusted if appropriate. Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows: Buildings 12 - 15 years Storage tanks 15 years Shop tools and equipment 3 - 5 years Mining equipment 5 years Office equipment 4 - 5 years Furniture and fixtures 5 - 7 years Light trucks and utility vehicles 5 years The amortization method, residual values, and useful lives of property, plant and equipment are reviewed annually, and any change in estimate is applied prospectively. Non-operating assets Non-operating assets consist of mineral properties and rights, along with data and analyses related to the properties, which are in various stages of evaluation and permitting. Costs to acquire the non-operating assets are capitalized at cost or fair value if such assets were a part of a business combination. Mining activities for non-operating assets involve the search for minerals, the determination of technical feasibility and the assessment of commercial viability of an identified resource. Expenditures incurred in relation to such mining activities include costs which are directly attributable to researching and analyzing existing exploration data; conducting geological studies, exploratory drilling and sampling; examining and testing extraction and treatment methods; and completing pre-feasibility and feasibility studies. Such expenditures are expensed as incurred. Mineral properties, that are not held for production, and any related surface access to the minerals generally require periodic payments and/or certain expenditures related to the property in order for the Company to retain its interest in the mineral property (collectively, “ Holding Costs ”). The Company expenses all Holding Costs in the period they are incurred. Stand-by properties Stand-by properties are mineral properties that have extracted mineral resources in the past but are currently non-operating or properties which could extract mineral resources in the future. Expenditures related to these properties are primarily related to maintaining the assets and permits in a condition that will allow re-start of the operations or development given appropriate commodity prices. All costs related to stand-by assets are expensed as incurred. The Mill operates on a campaign basis. When the Mill is not recovering material, all related costs are expensed as incurred. Leases The Company accounts for leases under ASU 2016-02 which requires leases to be recognized as assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. The Company recognizes in the balance sheet a liability to make lease payments (the lease liability) and the right-of-use asset representing the right to the underlying asset for the lease term. For leases with a term of twelve months or less, the Company has made an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. See Note 15 for further discussion. Asset retirement obligations The Company’s asset retirement obligations (“ ARO ”) relate to expected mine, wellfield, plant and mill reclamation and closure activities, as well as costs associated with reclamation of exploration drilling. The Company’s activities are subject to numerous governmental laws and regulations. Estimates of future reclamation liabilities for ARO are recognized in the period when such liabilities are incurred. These estimates are updated on a periodic basis and are subject to changing laws, regulatory requirements, changing technology and other factors which will be recognized when appropriate. Liabilities related to site restoration include long-term treatment and monitoring costs and incorporate total expected costs net of recoveries. Expenditures incurred to dismantle facilities, restore and monitor closed resource properties are charged against the related ARO. As the Company has no proven or probable reserves, such costs, discounted to their present value, are expensed as soon as the obligation to incur such costs arises. The present value of AROs is measured by discounting the expected cash flows using a discount factor that reflects the credit-adjusted risk-free rate of interest, while taking into account an inflation rate. The decommissioning liability is accreted to full value over time through periodic accretion charges recorded to operations as accretion expense. The Company adjusts the estimate of the ARO for changes in the amount or timing of underlying future cash outflows. The impact of these adjustments to the ARO amounts are expensed as incurred. Loans and borrowings The Company's Convertible Debentures, all of which were redeemed in 2020, are recognized at fair value through the fair value option based on the closing price on the TSX and changes are recognized in earnings as a component of other income (expense). The Company’s interest-bearing loans and borrowings are measured at amortized cost using the effective interest method. Warrant liabilities The Company issued several tranches of warrants for various equity transactions in 2016 all of which were either settled or expired in 2021 and thus no longer outstanding as of December 31, 2021. The Company accounts for its warrants issued in accordance with the U.S. GAAP accounting guidance under FASB ASC Topic 815 Derivative and Hedging (“ ASC 815 ”) which requires instruments within its scope to be recorded on the balance sheet as either an asset or liability measured at its fair value, with changes in fair value recognized in earnings. In accordance with ASC 815, the Company has classified the warrants as liabilities. The warrants are subject to re-measurement at each balance sheet date, with any change in fair value recognized as a component of other income (expense), net in the Consolidated Statements of Operations and Comprehensive Income (Loss). The Company estimates the fair value of these warrants using market prices, if available, or the Black-Scholes option pricing model. The Black-Scholes option pricing model is based on the estimated market value of the underlying common stock at the measurement date, the remaining contractual term of the warrant, risk-free interest rates and expected dividends on, and expected volatility of the price of the underlying common stock. Revenue a. Sale of goods Revenue from the sale of mineral concentrates is recognized when it is probable that the economic benefits will flow to the Company and delivery has occurred, title has transferred, the sales price and costs incurred with respect to the transaction can be measured reliably, and collectability is reasonably assured. For uranium concentrates, revenue is typically recognized when delivery is evidenced by book transfer at the applicable uranium storage facility. For vanadium concentrates, revenue is typically recognized when delivery is evidenced by book transfer at the applicable vanadium storage facility. For rare earth concentrates, revenue is typically recognized when delivery of the mixed RE Carbonate material has arrived at the applicable separations facility. b. Rendering of services Revenue from the delivery of mineralized material received from the clean-up of a third-party uranium mine or for other Alternate Feed Materials is typically recognized upon delivery to the White Mesa Mill. Revenue from toll milling services is recognized as material is processed in accordance with the specifics of the applicable toll milling agreement. Revenue and unbilled accounts receivable are recorded as related costs are incurred using billing formulas included in the applicable toll milling agreement. Deferred revenues represent proceeds received from processing of toll materials where the Company has not delivered the material to the customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Share-based compensation The Company records share-based compensation awards exchanged for employee services at fair value on the date of the grant and expenses the awards in the Consolidated Statements of Operations and Comprehensive Income (Loss) over the requisite employee service period. The fair value of stock options is determined using the Black-Scholes valuation model. The fair value of RSUs is based on the Energy Fuels’ stock price on the date of grant. The fair value of SARs with performance conditions is based on a Monte Carlo simulation performed by a third-party valuation firm. Share-based compensation expense related to awards with only service conditions having a graded vesting schedule is recorded on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards, while expense for all other awards are recognized on a straight-line basis. The Company’s estimates may be impacted by certain variables including, but not limited to, stock price volatility, employee stock option exercise behaviors, additional stock option grants, estimates of forfeitures, the Company's performance, and related tax impacts. Foreign currency Transactions in foreign currencies are translated to the respective functional currency of the Company’s subsidiaries and joint ventures at exchange rates at the dates of the transactions. Monetary assets and liabilities denominated in foreign currencies are translated to the functional currency at the exchange rate as of the reporting date. Non-monetary assets and liabilities that are measured at fair value in a foreign currency are translated to the functional currency at the exchange rate when the fair value was determined. Foreign currency differences are generally recognized in profit or loss. Non-monetary items that are measured based on historical cost in a foreign currency are not translated. The assets and liabilities of entities whose functional currency is not the U.S. dollar are translated into the U.S. dollar at the exchange rate as of the reporting date. The income and expenses of such entities are translated into the U.S. dollar using average exchange rates for the reporting period. Exchange differences on foreign currency translations are recorded in other comprehensive income (loss). The Company’s functional currency is the U.S. dollar. Income taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred income tax assets and liabilities are recorded based on differences between the financial statement carrying values of existing assets and liabilities and their respective income tax bases (temporary differences), and losses carried forward. Deferred income tax assets and liabilities are measured using the enacted tax rates which will be in effect when the temporary differences are likely to reverse. The effect on deferred income tax assets and liabilities of a change in tax rates is included in operations in the period in which the change is enacted. The Company records a valuation allowance to reduce deferred income tax assets to the amount that is believed more likely than not to be realized. When the Company concludes that all or part of the deferred income tax assets are not realizable in the future, the Company makes an adjustment to the valuation allowance that is charged to income tax expense in the period such determination is made. Net income (loss) per share The Company presents basic and diluted income (loss) per share data for its Common Shares, calculated by dividing the income (loss) attributable to common shareholders of the Company by the weighted average number of Common Shares outstanding during the period. Diluted income (loss) per share is determined by adjusting the income (loss) attributable to common shareholders and the weighted average number of Common Shares outstanding for the effects of all potential dilutive instruments. Recently Adopted Accounting Pronouncements Non-employee Share-Based Payment In June 2018, the FASB issued ASU 2018-07, which more closely aligns the accounting for non-employee share-based payment transactions to the guidance for awards to employees except for specific guidance on certain inputs to an option-pricing model and the attribution of cost. The Company adopted this standard effective January 1, 2019 and adoption did not have a significant impact on our net earnings. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, which amended the fair value measurement guidance by removing and modifying certain disclosure requirements, while also adding new disclosure requirements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty would be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments would be applied retrospectively to all periods presented upon their effective date. The Company adopted this pronouncement effective January 1, 2020. Income Taxes - Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, “Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740),” which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. ASU 2019-12 will be effective for interim and annual periods beginning after December 15, 2020 (January 1, 2021 for the Company). Early adoption is permitted. The Company has evaluated the impact the of the adoption of ASU 2019-12 and it does not have an impact on its consolidated financial statements, and may not have an impact until such a time that the Company incurs income tax expenses. Financial Instruments - Credit Losses

MARKETABLE SECURITIES

MARKETABLE SECURITIES	12 Months Ended
MARKETABLE SECURITIES	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
MARKETABLE SECURITIES	MARKETABLE SECURITIES The following tables summarize our marketable securities by significant investment categories as of December 31, 2021: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable equity securities $ 756 $ (262) $ — $ 494 The following tables summarize our marketable securities by significant investment categories as of December 31, 2020: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable equity securities $ 824 $ (418) $ 1,841 $ 2,247

RECEIVABLES

RECEIVABLES	12 Months Ended
RECEIVABLES	Dec. 31, 2021
Receivables [Abstract]
Receivables	RECEIVABLES December 31, 2021 December 31, 2020 Trade receivables $ 1,858 $ 385 Other 1,753 441 Notes receivable, net 343 343 $ 3,954 $ 1,169 During the year ended December 31, 2014, the Company received two notes with a combined principal totaling $1.05 million due in 2018 in connection with the sale of certain assets previously recorded as held for sale. The note with principal totaling $0.50 million was collected during the year ended December 31, 2018. Alternatively, the note with a principal payment of $0.55 million due November 7, 2018 was not paid and the Company notified the issuing party (“ Default Party ”) of its default on November 9, 2018. The Company has an allowance for credit losses of $0.22 million as of December 31, 2021 (2020 - $0.22 million) against the collectability of this note. The promissory note is secured by all issued and outstanding stock and all of the assets sold to the default party.

INVENTORIES

INVENTORIES	12 Months Ended
INVENTORIES	Dec. 31, 2021
Inventory Disclosure [Abstract]
Inventories	INVENTORIES December 31, 2021 December 31, 2020 Concentrates and work-in-progress (1) $ 27,619 $ 25,768 Inventory of ore in stockpiles 351 241 Raw materials and consumables 4,170 2,912 $ 32,140 $ 28,921 Inventories - by duration Current $ 30,772 $ 27,575 Long term - raw materials and consumables 1,368 1,346 $ 32,140 $ 28,921

INVESTMENTS ACCOUNTED FOR AT FA

INVESTMENTS ACCOUNTED FOR AT FAIR VALUE	12 Months Ended
INVESTMENTS ACCOUNTED FOR AT FAIR VALUE	Dec. 31, 2021
Fair Value Disclosures [Abstract]
INVESTMENTS ACCOUNTED FOR AT FAIR VALUE	FAIR VALUE ACCOUNTING Assets and liabilities measured at fair value on a recurring basis The following tables set forth the fair value of the Company’s assets and liabilities measured at fair value on a recurring basis (at least annually) by level within the fair value hierarchy as of December 31, 2021. As required by accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Fair value accounting utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2 - Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity). Our financial instruments include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and current accrued liabilities. These instruments are carried at cost, which approximates fair value due to the short-term maturities of the instruments. Allowances for doubtful accounts are recorded against the accounts receivable balance to estimate net realizable value. The fair value of the Company’s Convertible Debentures are measured at fair value based on the closing price on the TSX (a Level 1 measurement) and changes are recognized in other income (expense). The Company’s investments in marketable equity securities which are exchange traded and are valued using quoted market prices in active markets and as such are classified within Level 1 of the fair value hierarchy. The Company’s investments in marketable debt securities which are exchange-traded and are valued using quoted prices of a pricing service and as such are classified within Level 2 of the fair value hierarchy. The Company’s investments accounted for at fair value consisting of Common Shares are valued using quoted market prices in active markets and as such are classified within Level 1 of the fair value hierarchy. The Company’s investments accounted for at fair value consisting of warrants are valued using the Black-Scholes option model based on observable inputs and as such are classified within Level 2 of the hierarchy. The Company’s warrants are classified as liabilities. The warrants are subject to re-measurement at each balance sheet date, with any change in fair value recognized as a component of other income (expense), net in the Consolidated Statements of Operations and Comprehensive Income (Loss). The warrants issued in September 2016 are classified as Level 1 under the fair value hierarchy using quoted market prices in active markets. As of December 31, 2021 and 2020, the fair values of cash and cash equivalents, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments. December 31, 2021 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 37,407 $ 1,131 $ — $ 38,538 Marketable equity securities (Note 4) 494 — — 494 $ 37,901 $ 1,131 $ — $ 39,032 December 31, 2020 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 779 $ — $ — $ 779 Marketable equity securities (Note 4) 2,247 — — 2,247 Warrant liabilities (Note 12) (8,573) — — (8,573) $ (5,547) $ — $ — $ (5,547) There were no transfers into or out of Level 3 during the year ended December 31, 2021.

PROPERTY, PLANT AND EQUIPMENT A

PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES	12 Months Ended
PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Plant and Equipment and Mineral Properties	PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES The following is a summary of property, plant and equipment: December 31, 2021 December 31, 2020 Cost Accumulated Net Book Value Cost Accumulated Net Book Property, plant and equipment Nichols Ranch $ 29,210 $ (18,185) $ 11,025 $ 29,210 $ (16,150) $ 13,060 Alta Mesa 13,626 (4,996) 8,630 13,626 (4,088) 9,538 Equipment and other 15,079 (12,751) 2,328 13,528 (12,505) 1,023 Property, plant and equipment total $ 57,915 $ (35,932) $ 21,983 $ 56,364 $ (32,743) $ 23,621 The net book value for the Nichols Ranch Project includes the value beyond proven and probable Mineral Reserves ascribed to the processing plant, the Nichols Ranch wellfields and the Jane Dough project upon acquisition. For the year ended December 31, 2021, the Company recorded nil (December 31, 2020 - $0.51 million) of depreciation expense related to Nichols Ranch that was included in the capitalized costs to inventory on the Consolidated Balance Sheet. The following is a summary of mineral properties: December 31, 2021 December 31, 2020 Mineral properties Uranerz ISR properties $ 25,974 $ 25,974 Sheep Mountain 34,183 34,183 Roca Honda 22,095 22,095 Other 1,287 1,287 Mineral properties total $ 83,539 $ 83,539 Disposal of certain properties On July 15, 2021, the Company and CUR jointly announced the signing of a definitive asset purchase agreement (the “ Agreement ”) for CUR to acquire a portfolio of the Company's non-core conventional uranium projects located in Utah and Colorado, including the Daneros mine, the Tony M mine, the Rim mine, the Sage Plain project, and several U.S. Department of Energy leases (the “ Sale ”). On October 27, 2021 (“ Closing Date ”), the parties closed the Sale in accordance with the terms of the Agreement, as a result of which the aforementioned properties and leases were transferred to CUR in exchange for the following consideration: • $2,000,000 in cash on the Closing Date; • the issuance of 11,860,101 Common Shares of CUR, constituting 19.9% of the outstanding CUR Common Shares immediately after the Closing Date, at a price per share of CDN$2.95 equal to the closing price of the CUR Common Shares on the TSX Venture Exchange (“ TSXV ”) on the last trading day immediately prior to issuance; • an additional CDN$3,000,000 in cash payable on or before the 18-month anniversary of the Closing Date (“ Second Payment ”); • an additional CDN$3,000,000 in cash payable on or before the 36-month anniversary of the Closing Date (“ Third Payment ” and together with the Second Payment, the “ Deferred Cash Payments ”); and • the commitment to make production payments on a per-project basis totaling CDN$5,000,000 as set forth pursuant to individual production payment agreements executed on the Closing Date. As part of the Agreement, the Company has entered into a mine operating agreement pursuant to which it will act, through its indirect wholly owned subsidiary Energy Fuels Resources (USA) Inc., as Operator to the Sale projects in accordance with a program and budget determined annually, in exchange for which the Company will receive reimbursement for all direct costs in addition to an overhead allocation and management fee. In addition, the Company has entered into a toll milling agreement pursuant to which it will process all ore mined from the properties at the Mill, in exchange for which the Company will receive reimbursement of direct costs in addition to a milling fee. Pursuant to an investor rights agreement, for so long as the Company’s equity ownership in CUR remains at or above 10%, it will be entitled to equity participation rights to maintain its pro-rata equity ownership in the Company and to appoint one nominee to the CUR Board of Directors. The Company’s CEO was appointed to the CUR Board of Directors at the Closing Date. These non-core conventional uranium project assets had no carrying value at the Closing Date. The Company recognized a gain on the disposal of $35.73 million at the Closing Date and subsequently derecognized asset retirement obligations of $0.27 million prior to December 31, 2021 upon being legally released from being the primary obligor under the liabilities. For a period of three years, if CUR issues Common Shares or other securities convertible into Common Shares in a private placement or prospectus offering, the Company has the right to accelerate a portion of the Deferred Cash Payments, in cash or securities, up to a maximum amount equal to the product of (i) the gross proceeds of the financing multiplied by (ii) the Company’s then current cumulative percentage ownership of CUR common stock on a non-diluted basis prior to the completion of the financing (the “ Acceleration Right ”). On November 22, 2021, CUR completed such a financing under which the Company elected its Acceleration Right and received 1,875,085 Common Shares of CUR and 937,542 warrants to purchase Common Shares of

IMPAIRMENTS

IMPAIRMENTS	12 Months Ended
IMPAIRMENTS	Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Impairments	IMPAIRMENTS Impairment of property, plant and equipment, mineral properties and mineral properties held for sale The Company conducts a review of potential triggering events for all its mineral properties on a quarterly basis. When events or changes in circumstances indicate that the related carrying amounts may not be recoverable, the Company carries out a review and evaluation of its long-lived assets in accordance with its accounting policy. No impairment of property, plant and equipment, mineral properties and mineral properties held for sale recorded in the years ended December 31, 2021, 2020 and 2019.

ASSET RETIREMENT OBLIGATIONS AN

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH	12 Months Ended
ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations and Restricted Cash	ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH The following table summarizes the Company’s asset retirement obligations: December 31, 2021 December 31, 2020 Asset retirement obligation, beginning of period $ 13,038 $ 18,972 Revision of estimate (235) (7,845) Disposal of non-core obligations (269) — Accretion of liabilities 1,284 1,911 Settlements (131) — Asset retirement obligation, end of period $ 13,687 $ 13,038 Asset retirement obligation: Current $ 27 $ 131 Non-current 13,660 12,907 Asset retirement obligation, end of period $ 13,687 $ 13,038 The asset retirement obligations of the Company are subject to legal and regulatory requirements. Estimates of the costs of reclamation are reviewed periodically by the Company and the applicable regulatory authorities. The above provision represents the Company’s estimate of the present value of future reclamation costs, discounted using credit adjusted risk-free rates ranging from 9.50% to 11.67% and inflation rates ranging from 2.00% to 2.41%. The total undiscounted decommissioning liability at December 31, 2021 is $41.34 million (2020 - $41.95 million). The downward revision of estimate of $0.24 million for the year ended December 31, 2021 includes net changes in estimated costs, timing and discount rates of future reclamation activities. These revisions were recognized in Development, permitting, and land holding, and Standby costs on the Consolidated Statement of Operations and Comprehensive Income (Loss). The Company derecognized asset retirement obligations of $0.27 million prior to December 31, 2021 upon being legally released from being the primary obligor under the liabilities and this disposal was recognized in Gain on sale of non-core assets on the Consolidated Statement of Operations and Comprehensive Income (Loss). The downward revision of estimate of $7.85 million for the year ended December 31, 2020 includes net changes in the estimated costs, timing and discount rates of future reclamation activities. These revisions were recognized in Development, permitting, and land holding and Standby costs on the Consolidated Statement of Operations and Comprehensive Income (Loss). The following table summarizes the Company’s restricted cash: December 31, 2021 December 31, 2020 Restricted cash, beginning of period $ 20,817 $ 20,081 Additional collateral posted 48 768 Refunds of collateral (560) (32) Restricted cash, end of period $ 20,305 $ 20,817

LOANS AND BORROWINGS

LOANS AND BORROWINGS	12 Months Ended
LOANS AND BORROWINGS	Dec. 31, 2021
Debt Disclosure [Abstract]
Loans and Borrowings	LOANS AND BORROWINGS On July 24, 2012, the Company completed a bought deal public offering of 22,000 floating-rate convertible unsecured subordinated debentures originally maturing June 30, 2017 (the “ Convertible Debentures ”) at a price of Cdn$1,000 per Convertible Debenture for gross proceeds of Cdn$21.55 million (the “ Offering ”). The Convertible Debentures are convertible into Common Shares at the option of the holder. Interest is paid in cash and in addition, unless an event of default has occurred and is continuing, the Company may elect, from time to time, subject to applicable regulatory approval, to satisfy its obligation to pay interest on the Convertible Debentures, on the date it is payable under the indenture: (i) in cash; (ii) by delivering sufficient Common Shares to the debenture trustee, for sale, to satisfy the interest obligations in accordance with the indenture in which event holders of the Convertible Debentures will be entitled to receive a cash payment equal to the proceeds of the sale of such Common Shares; or (iii) any combination of (i) and (ii). On August 4, 2016, the Company, by a vote of the debenture holders, extended the maturity date of the Convertible Debentures from June 30, 2017 to December 31, 2020, and reduced the conversion price of the Convertible Debentures from Cdn$15.00 to Cdn$4.15 per Common Share of the Company. In addition, a redemption provision was added that enabled the Company, upon giving not less than 30 days’ notice to debenture holders, to redeem the Convertible Debentures for cash, in whole or in part at any time after June 30, 2019 but prior to maturity, at a price of 101% of the aggregate principal amount redeemed, plus accrued and unpaid interest (less any tax required by law to be deducted) on such Convertible Debentures up to but excluding the redemption date. In addition, certain other amendments were made to the indenture, as required by the U.S. Trust Indenture Act of 1939, as amended, and with respect to the addition of a U.S. Trustee in compliance therewith, as well as to remove provisions of the indenture that no longer apply, such as U.S. securities law restrictions. On July 14, 2020, the Company redeemed Cdn$10.43 million principal amount of the Cdn$20.86 million Convertible Debentures. The Convertible Debentures were redeemed on that date for an amount equal to 101% of the aggregate principal amount plus accrued and unpaid interest thereon, up to but excluding July 14, 2020 for approximately $7.78 million. On October 6, 2020, the Company redeemed the remaining Cdn$10.43 million principal amount of the Cdn$10.43 million Convertible Debentures then outstanding for approximately $7.82 million. The Convertible Debentures were redeemed on that date for an amount equal to 101% of the aggregate principal amount, plus accrued and unpaid interest thereon, up to but excluding October 6, 2020. As a result of the final redemption, no Convertible Debentures remain outstanding and the Convertible Debentures have ceased to be listed on the TSX. The Company currently has no other remaining short- or long-term debt. The Convertible Debentures were measured at fair value based on the closing price on the TSX (a Level 1 measurement), and changes were recognized in earnings. For the year ended December 31, 2020, the Company recorded a gain on revaluation of Convertible Debentures of $0.16 million).

CAPITAL STOCK

CAPITAL STOCK	12 Months Ended
CAPITAL STOCK	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
Capital Stock	CAPITAL STOCK Authorized capital stock The Company is authorized to issue an unlimited number of Common Shares without par value, unlimited Preferred Shares issuable in series, and unlimited Series A Preferred Shares. The Series A Preferred Shares issuable are non-redeemable, non-callable, non-voting and with no right to dividends. The Preferred Shares issuable in series will have the rights, privileges, restrictions and conditions assigned to the particular series upon the Board of Directors approving their issuance. Issued capital stock The significant transactions relating to capital stock issued during 2021, 2020, and 2019 are: a) On February 20, 2020, the Company completed a bought deal public offering of 11,300,000 Common Shares at a price of $1.47 per share. The Company received net proceeds, after commissions and fees, of $15.14 million. b) In the year ended December 31, 2021, the Company issued 16,627,512 Common Shares under the Company’s ATM offering for net proceeds of $106.21 million. In the year ended December 31, 2020, the Company issued 21,361,784 Common Shares under the Company’s ATM offering for net proceeds of $37.25 million. In the year ended December 31, 2019, the Company issued 8,043,365 Common Shares under the Company’s ATM for net proceeds of $19.68 million. Share Purchase Warrants The following table summarizes the Company’s share purchase warrants denominated in U.S. dollars. These warrants are accounted for as derivative liabilities, as the functional currency of the entity issuing the warrants, Energy Fuels Inc., is Cdn$. Month Issued Expiry Date Exercise Price Warrants Fair value at September 2016 (1) September 20, 2021 2.45 — $ — (1) The warrants issued in September 2016 are classified as Level 1 under the fair value hierarchy (Note 19). Each warrant was exercisable until September 20, 2021 and entitled the holder thereof to acquire one common share upon exercise at an exercise price of $2.45 per common share. These warrants are accounted for as a derivative liability, as the functional currency of the entity issuing the warrant is Cdn$. On March 14, 2019, 2,328,925 warrants issued in March 2016 expired un-exercised.

BASIC AND DILUTED LOSS PER COMM

BASIC AND DILUTED LOSS PER COMMON SHARE	12 Months Ended
BASIC AND DILUTED LOSS PER COMMON SHARE	Dec. 31, 2021
Earnings Per Share [Abstract]
Basic and Diluted Loss Per Common Share	BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE The following is a reconciliation of weighted average Common Shares outstanding for the years ended December 31, 2021, 2020, 2019, respectively: Years ended December 31, 2021 2020 2019 Issued shares at beginning of period 134,311,033 100,735,889 91,445,066 Effect of stock options exercised 474,072 12,934 45,040 Effect of shares issued for settlement of vesting of restricted stock units 443,364 452,932 786,746 Effect of shares issued for settlement of exercises of stock appreciation rights 2,316 — — Effect of shares issued for exercise of share purchase warrants 1,737,981 — 1,057 Shares issued for consulting services 35,933 74,672 46,067 Effect of shares issued to settle liabilities — — 141,525 Effect of shares issued in public offerings 9,899,825 19,891,709 3,199,866 Weighted average common shares outstanding 146,904,524 121,168,136 95,665,367 Basic and diluted income (loss) per common share The calculation of basic and diluted income (loss) per share after adjustment for the effects of all potential dilutive Common Shares, calculated as follows: Years ended December 31, 2021 2020 2019 Net income (loss) attributable to owners of the Company $ 1,541 $ (27,776) $ (37,978) Basic weighted average common shares outstanding 146,904,524 121,168,136 95,665,367 Dilutive impact of stock options, restricted stock units, and warrants 2,816,593 — — Diluted weighted average common shares outstanding 149,721,117 121,168,136 95,665,367 Basic net income (loss) per common share $ 0.01 $ (0.23) $ (0.40) Diluted net income (loss) per common share $ 0.01 $ (0.23) $ (0.40)

SHARE-BASED PAYMENTS

SHARE-BASED PAYMENTS	12 Months Ended
SHARE-BASED PAYMENTS	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Share-Based Payments	SHARE-BASED PAYMENTS The Company, under the 2021 Amended and Restated Omnibus Equity Incentive Compensation Plan (the “ Compensation Plan ”), maintains an equity incentive plan for directors, executives, eligible employees and consultants. Equity incentive awards include employee stock options, RSUs and SARs. The Company issues new shares of common stock to satisfy exercises and vesting under its equity incentive awards. At December 31, 2021, a total of 15,626,220 Common Shares were authorized for equity incentive plan awards. Employee Stock Options The Company, under the Compensation Plan, may grant stock options to directors, executives, employees and consultants to purchase Common Shares of the Company. The exercise price of the stock options is set as the higher of the Company’s closing share price on the day before the grant date and the five-day VWAP ending on the day before the grant date. Stock options granted under the Compensation Plan generally vest over a period of two years or more and are generally exercisable over a period of five years from the grant date, such period not to exceed 10 years. The value of each option award is estimated at the grant date using the Black-Scholes Option Valuation Model. The fair value of the stock options granted under the Compensation Plan for the years ended December 31, 2021, 2020 and 2019 was estimated at the date of grant, using the Black-Scholes Option Valuation Model, with the following weighted average assumptions: Years ended December 31, 2021 2020 2019 Risk-free interest rate 0.44 % 1.27 % 2.62 % Expected life (in years) 5.0 years 4.6 years 5.0 years Expected volatility 61.96 % 61.81 % * 59.38 % * Expected dividend yield 0 % 0 % 0 % Weighted average grant date fair value $ 2.06 $ 0.82 $ 1.54 * Expected volatility is measured based on the Company’s historical share price volatility over a period equivalent to the expected life of the stock options. The summary of the Company’s stock options at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Range of Exercise Prices Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2018 $1.70 - $15.61 1,732,754 $ 3.84 Granted 2.92 296,450 2.92 Exercised 1.70 - 2.92 (54,805) 2.27 Forfeited 1.70 - 7.42 (342,866) 3.94 Expired 6.97 (144,100) 6.97 Outstanding, December 31, 2019 $1.70 - $15.61 1,487,433 $ 3.43 Granted 1.76 - 3.06 711,414 1.77 Exercised 1.70 - 2.92 (302,707) 1.97 Forfeited 1.70 - 5.18 (188,541) 3.26 Expired 4.12 - 5.22 (98,512) $ 4.40 Outstanding, December 31, 2020 $1.70 - $15.61 1,609,087 $ 2.91 Granted 3.89 - 8.41 169,310 3.99 Exercised 1.70 - 7.42 (775,814) 2.95 Forfeited 1.76 - 5.91 (8,048) 3.16 Expired 1.70 - 15.61 (51,653) 8.14 Outstanding, December 31, 2021 $1.70 - $8.41 942,882 $ 2.79 2.50 $ 4,565 Exercisable, December 31, 2021 $1.70 - $7.14 729,565 $ 2.83 2.22 $ 3,504 In the year ended December 31, 2021, the Company issued 775,814 shares upon exercise of stock options at an average exercise price of $2.95 with an intrinsic value of $2.88 million. The Company received cash proceeds related to stock option exercises of $2.38 million during the year ended December 31, 2021. In the year ended December 31, 2020, the Company issued 302,707 shares upon exercise of stock options at an average exercise price of $1.97 with an intrinsic value of $0.42 million. The Company received cash proceeds related to stock option exercises of $0.49 million during the year ended December 31, 2020. In the year ended December 31, 2019, the Company issued 54,805 shares upon exercise of stock options at an average exercise price of $2.27 with an intrinsic value of $0.05 million. The Company received cash proceeds related to stock option exercises of $0.15 million during the year ended December 31, 2019. The summary of the Company’s non-vested stock options at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2018 297,044 $ 1.06 Granted 296,450 1.54 Vested (356,626) 1.27 Forfeited (13,487) 1.59 Non-vested, December 31, 2019 223,381 $ 1.32 Granted 711,414 0.82 Vested (508,630) 0.94 Forfeited (22,175) 0.96 Non-vested, December 31, 2020 403,990 $ 0.94 Granted 169,310 2.06 Vested (351,934) 1.23 Forfeited (8,049) 1.60 Non-vested, December 31, 2021 213,317 $ 1.34 Restricted Stock Units The Company grants RSUs to directors, executives and eligible employees. Awards for executives and eligible employees are determined as a target percentage of base salary and generally vest over three years. Prior to vesting, holders of RSUs generally do not have voting rights. The RSUs are subject to forfeiture risk and other restrictions. Upon vesting, the employee is entitled to receive one share of the Company’s common stock for each RSU at no additional payment. During the year ended December 31, 2021, the Company’s Board of Directors issued 0.44 million RSUs under the Compensation Plan (2020 – 0.74 million, 2019 - 0.73 million). The summary of the Company’s non-vested RSUs at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2018 1,580,187 $ 1.99 Granted 731,435 2.91 Vested (862,378) 2.00 Forfeited (133,708) 2.40 Non-vested, December 31, 2019 1,315,536 $ 2.45 Granted 740,998 1.65 Vested (746,477) 2.45 Forfeited (216,001) 2.13 Non-vested, December 31, 2020 1,094,056 $ 1.98 Granted 441,241 3.89 Vested (635,233) 1.94 Forfeited — — Non-vested, December 31, 2021 900,064 $ 2.94 The total intrinsic value and fair value of RSUs that vested and were settled for equity in the year ended December 31, 2021 was $2.67 million (2020 - $1.21 million, 2019 - $2.51 million). Stock Appreciation Rights During the year ended December 31, 2019, the Company’s Board of Directors issued 2.20 million SARs under the Compensation Plan (2021 and 2020 - nil) with a fair value of $1.25 per SAR. These SARs are intended to provide additional long-term performance-based equity incentives for the Company’s senior management. The SARs are performance based because they only vest upon the achievement of performance goals designed to significantly increase shareholder value. Each SAR granted entitles the holder to receive, upon a valid exercise, payment from the Company in cash or Common Shares (at the sole discretion of the Company) in an amount representing the difference between the fair market value (“ FMV ”) of the Company’s Common Shares on the date of exercise and $2.92 (the closing market price or “Grant Price” at the time of grant). Fair Market Value as used herein means the closing price of the Shares on the TSX or the NYSE American on the trading day immediately prior to the date of exercise. The term of the SARs grant is five years, with SARs vesting only upon the achievement of the following performance goals: as to one-third of the SARs granted, automatically upon the 90-calendar-day volume weighted average price (“ VWAP ”) of the Company’s Common Shares on the NYSE American equaling or exceeding $5.00 for any continuous 90-calendar-day period; as to an additional one-third of the SARs granted, automatically upon the 90-calendar-day VWAP of the Company’s Common Shares on the NYSE American equaling or exceeding $7.00 for any continuous 90-calendar-day period; and as to the final one-third of the SARs granted, automatically upon the 90-calendar-day VWAP of the Company’s Common Shares on the NYSE American equaling or exceeding $10.00 for any continuous 90-calendar-day period. Further, notwithstanding the foregoing vesting schedule, no SARs were able to be exercised by the holder for an initial period of one year from the Date of Grant; the date first exercisable being January 22, 2020. The first two tranches of these vesting performance goals were met during the year ended December 31, 2021. The summary of the Company’s SARs at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2018 — $ — Granted 2,195,994 2.92 Exercised — — Forfeited (30,485) 2.92 Expired — — Outstanding, December 31, 2019 2,165,509 $ 2.92 Granted — — Exercised — — Forfeited (444,886) 2.92 Expired — — Outstanding, December 31, 2020 1,720,623 $ 2.92 Granted — — Exercised (48,201) 2.92 Forfeited — — Expired — — Outstanding, December 31, 2021 1,672,422 $ 2.92 2.06 $ 7,877 Exercisable, December 31, 2021 1,098,873 $ 2.92 2.06 $ 5,176 In the year ended December 31, 2021, the Company issued 5,643 shares and paid cash of $0.26 million upon the exercise of 48,201 SARs with a total intrinsic value of $0.31 million. The summary of the Company’s non-vested SARs at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Grant Date Fair Value Non-vested December 31, 2018 — $ — Granted 2,195,994 1.25 Vested — — Forfeited (30,485) 1.25 Non-vested December 31, 2019 2,165,509 $ 1.25 Granted — — Vested — — Forfeited (444,886) 1.25 Non-vested December 31, 2020 1,720,623 $ 1.25 Granted — — Vested (1,147,074) 1.27 Forfeited — — Non-vested December 31, 2021 573,549 $ 1.19 The components of share-based compensation are as follows: Years ended December 31, 2021 2020 2019 Recognized expense Stock options $ 323 $ 555 $ 453 RSU awards (1) 1,562 1,272 2,006 SARs 273 771 1,312 Total recognized expense $ 2,158 $ 2,598 $ 3,771 (1) The fair value of the RSUs granted under the Compensation Plan for the years ended December 31, 2021, 2020 and 2019, was estimated at the date of grant, using the stated market price. At December 31, 2021, there were $0.06 million, $0.68 million and nil of unrecognized compensation costs related to the unvested stock options, RSU awards and SARs, respectively, to be recognized over a weighted average period of 1.13 years, 1.67 years, and zero years, respectively.

LEASES

LEASES	12 Months Ended
LEASES	Dec. 31, 2021
Leases [Abstract]
Leases	LEASES The Company’s leases are primarily for office space, the largest being an office building lease for the Company’s Lakewood, Colorado corporate offices. As of December 31, 2021, this lease has a remaining term of approximately 17 months and includes an option to extend the lease for one five-year term. Certain of our other leases include variable payments for lessor operating expenses that are not included within right-of-use (“ ROU ”) assets and lease liabilities in the Consolidated Balance Sheets. The Company’s lease agreements do not contain any material residual value guarantees or restrictive covenants. Beginning January 1, 2019, operating ROU assets and operating lease liabilities are recognized based on the present value of lease payments over the lease term at commencement date. Operating leases in effect prior to January 1, 2019 were recognized at the present value of the remaining payments on the remaining lease term as of January 1, 2019. Because most of the Company's leases do not provide an explicit rate of return, the Company's incremental secured borrowing rate based on lease term information available at the commencement date of the lease will be used in determining the present value of lease payments. For purposes of calculating operating lease liabilities, lease terms may be deemed to include options to extend or terminate the lease when it is reasonably certain that we will exercise that option. The Company’s operating lease expense is recognized on a straight-line basis over the lease term and is recorded in General and Administration expenses. Short-term leases, which have an initial term of 12 months or less, are not recorded in the Consolidated Balance Sheets. Total lease cost includes the following components: Years ended December 31, 2021 2020 2019 Operating leases $ 308 $ 339 $ 381 Short-term leases 324 297 297 Sublease income — — (56) Total lease expense $ 632 $ 636 $ 622 The weighted average remaining lease term and weighted average discount rate were as follows: Years ended December 31, 2021 2020 2019 Weighted average remaining lease term of operating leases 1.4 years 2.4 years 3.3 years Weighted average discount rate of operating leases 9.0 % 9.0 % 9.0 % Supplemental cash flow information related to leases was as follows: Years ended December 31, 2021 2020 2019 Operating cash flow information: Cash paid for amounts included in the measurement of operating lease liabilities $ 343 $ 367 $ 333 Future minimum payments of operating lease liabilities as of December 31, 2021 are as follows: Years ending December 31: 2022 $ 350 2023 147 2024 — 2025 — 2026 — Thereafter — Total lease payments $ 497 Less: Interest (28) Present value of lease liabilities $ 469

INCOME TAXES

INCOME TAXES	12 Months Ended
INCOME TAXES	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES For financial reporting purposes, income before taxes includes the following components: Years ended December 31, 2021 2020 2019 Canada $ (7,549) $ (10,407) $ (4,174) Foreign 8,997 (17,465) (33,920) Total $ 1,448 $ (27,872) $ (38,094) A reconciliation of income tax expense and the product of accounting income before income tax, multiplied by the combined Canadian federal and provincial income tax rate (the rate applicable to the Canadian parent company) is as follows: Years ended December 31, 2021 2020 2019 Income (Loss) before income taxes $ 1,448 $ (27,872) $ (38,094) Combined federal and provincial rate 26.50 % 26.50 % 26.50 % Expected income tax recovery $ 384 $ (7,385) $ (10,095) Share-based compensation (89) 565 985 Other non-deductible/non-taxable items 159 1,985 (376) Unrecognized deferred tax assets (454) 4,835 9,486 Income tax expense $ — $ — $ — The components of the net deferred tax assets and liabilities as of December 31, 2021 and 2020 are as follows: Years ended December 31, 2021 2020 Deferred tax assets Inventories $ 6,380 $ 7,051 Short-term investments 209 209 Operating loss carry forwards 101,345 95,060 Capital loss carry forwards 914 843 Deferred revenue and other 1,520 2,057 Mineral properties and deferred costs, United States 18,682 24,794 Mineral properties and deferred costs, Canada 1,884 1,760 Asset retirement obligations 3,627 3,455 Property, plant and equipment 942 1,806 Total deferred tax assets $ 135,503 $ 137,035 Less: valuation allowance (135,503) (137,035) Net deferred tax assets $ — $ — At December 31, 2021, and 2020, the Company recorded a valuation allowance against the net deferred tax assets for the above related items in the financial statements as management did not consider it more likely than not that the Company will be able to realize the deferred tax assets in the future. The following table summarizes the changes to the valuation allowance: For the Years Ended Balance Balance December 31, Beginning of Period Additions (a) Deductions (b) End of Period 2021 $ 137,035 $ 6,653 $ (8,185) $ 135,503 2020 $ 131,554 $ 7,140 $ (1,659) $ 137,035 a) The 2021 additions to the valuation allowance result from additional losses incurred and increases to other tax assets such as reclamation obligations. Management does not feel these additions meet the more-likely-than-not criterion for recognition. b) The 2021 reductions to the valuation allowance result primarily from the decreases to other tax assets such as property, plant and equipment and mineral properties. The following table summarizes the Company's capital losses and net operating losses as of December 31, 2021 that can be applied against future taxable profit. Country Type Amount Expiry Date Canada Non-capital losses $ 49,737 2027 - 2039 Canada Allowable capital losses 3,450 None Canada Investment tax credits 1,254 2023-2027 United States Pre-2018 net operating losses 292,139 2026-2036 United States Post-2017 net operating losses 40,562 None United States US Excess Interest Carryforward 11 None Under Section 382 of the Internal Revenue Code of 1986, (“IRC Section 382”), a corporation that undergoes an ownership change is subject to limitations on its use of pre-change tax attributes and carryforwards to offset future taxable income. The Company has determined that as a result of previous changes in ownership, approximately $75 million in net operating losses will never be utilized as a result of these limitations and the remaining net operating losses are not expected to be utilized. In addition, as a result of the Tax Cuts and Jobs Act, United States net operating loss carryforwards generated after December 31, 2017, are limited to usage at 80% of taxable income and will be permitted to be carried forward indefinitely. Utilization of the Canadian loss carry forwards will be subject to the Acquisition of Control Rules in any year as a result of previous changes in ownership. The Company files income tax returns in the US federal and various state jurisdictions with varying statutes of limitations. The Company’s NOL from all years may be subject to adjustment for three or four years following the year in which utilized. We do not anticipate that any potential tax adjustments will have a significant impact on our financial position or results of operations. Company policy is to include interest and penalties related to uncertain tax positions in the income tax expense line on the financial statements. However, as of December 31, 2021 the Company does not have any uncertain tax positions.

SUPPLEMENTAL FINANCIAL INFORMAT

SUPPLEMENTAL FINANCIAL INFORMATION	12 Months Ended
SUPPLEMENTAL FINANCIAL INFORMATION	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Financial Information	SUPPLEMENTAL FINANCIAL INFORMATION The components of revenues are as follows: The Company had two major customers to which its sales for the year were as follows: 2021 - $1.57 million; $1.39 million (2020 (one major customer) - $1.55 million); (2019 (four major customers) - $2.72 million; $0.77 million; $0.75 million; $0.74 million). The Company’s revenues by country of customer for the current year were as follows: 2021 - $1.72 million - U.S.; $1.39 million - Estonia; $0.08 million - Other (2020 - $1.66 million - U.S.) (2019 - $5.80 million - U.S.; $0.07 million - Other). The Company did not have any deferred revenue at December 31, 2021, 2020 and 2019. The components of trade receivables are as follows: The Company had two major customers for which there were outstanding trade receivables as of December 31, 2021 as follows: $1.39 million; $0.37 million (as of December 31, 2020 (one major customer) - $0.35 million). The Company's trade receivables by country of customer as of December 31, 2021 were as follows: $0.47 million - U.S., $1.39 million - Estonia (as of December 31, 2020: $0.39 million - U.S.). In December of 2020, the Company entered into a three-year supply agreement with The Chemours Company (“Chemours”) to acquire natural monazite sands from the Chemours' Offerman Mineral Sand Plant in Georgia for processing at the Mill for the production of a marketable mixed RE carbonate as well as recovery of contained uranium, which is currently the Company’s only RE carbonate feed supplier. However, the Company is currently actively engaged in discussions to secure its own sources of monazite sands or other/additional REE bearing deposits. The components of other income (loss) are as follows: Years ended December 31, 2021 2020 2019 Interest income $ 44 $ 153 $ 482 Change in value of investments accounted for at fair value 7,106 1,835 (153) Change in value of warrant liabilities (8,078) (5,436) 3,726 Change in value of Convertible Debentures — 155 291 Foreign exchange gain (loss) (128) 767 (46) Department of Energy awards (1) 1,900 — — Other 350 233 (322) Other income (loss) $ 1,194 $ (2,293) $ 3,978 (1) See Part II, Item 7 " Outlook : Update on Rare Earth Element Initiative ." The components of accounts payable and accrued liabilities are as follows: December 31, 2021 December 31, 2020 Accounts payable $ 3,038 $ 1,108 Payroll liabilities 1,988 1,512 Other accrued liabilities 738 701 Accounts payable and accrued liabilities $ 5,764 $ 3,321

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
COMMITMENTS AND CONTINGENCIES	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES General legal matters Other than routine litigation incidental to our business, or as described below, the Company is not currently a party to any material pending legal proceedings that management believes would be likely to have a material adverse effect on our financial position, results of operations or cash flows. White Mesa Mill In 2013, the Ute Mountain Ute Tribe filed a Petition to Intervene and Request for Agency Action challenging the Corrective Action Plan approved by the State of Utah Department of Environmental Quality (“ UDEQ ”) relating to nitrate contamination in the shallow aquifer at the Mill. The challenge is currently being evaluated and may involve the appointment of an administrative law judge (“ ALJ ”) to hear the matter. The Company does not consider this action to have any merit. If the petition is successful, the likely outcome would be a requirement to modify or replace the existing Corrective Action Plan. At this time, the Company does not believe any such modification or replacement would materially affect its financial position, results of operations or cash flows. However, the scope and costs of remediation under a revised or replaced Corrective Action Plan have not yet been determined and could be significant. The UDEQ renewed in January 2018, then reissued with minor corrections in February 2018, the Mill’s radioactive materials license (the “ Mill License ”) for another ten years and the Groundwater Discharge Permit (the “ GWDP ”) for another five years, after which further applications for renewal of the Mill License and GWDP will need to be submitted. During the review period for each application for renewal, the Mill can continue to operate under its existing Mill License and GWDP until such time as the renewed Mill License or GWDP is issued. In 2018, the Grand Canyon Trust, Ute Mountain Ute Tribe and Uranium Watch (collectively, the “ Mill Plaintiffs ”) served Petitions for Review challenging UDEQ’s renewal of the Mill License and GWDP and Requests for Appointment of an ALJ, which they later agreed to suspend pursuant to a Stipulation and Agreement with UDEQ, effective June 4, 2018. The Company and the Mill Plaintiffs held multiple discussions over the course of 2018 and 2019 in an effort to settle the dispute outside of any judicial proceeding. In February 2019, the Mill Plaintiffs submitted to the Company their proposal for reaching a settlement agreement. The proposal remains under consideration by the Company. The Company does not consider these challenges to have any merit and, if a settlement cannot be reached, intends to participate with UDEQ in defending against the challenges. If the challenges are successful, the likely outcome would be a requirement to modify the renewed Mill License and/or GWDP. At this time, the Company does not believe any such modification would materially affect its financial position, results of operations or cash flows. On August 26, 2021, the Ute Mountain Ute Tribe filed a Petition to Intervene and Petition for Review challenging the UDEQ’s approval of Amendment No. 10 to the Mill License, which expanded the list of Alternate Feed Materials that the Mill is authorized to accept and process for its source material content. Then, on November 18, 2021, the Tribe filed its Request for Appointment of an ALJ, followed shortly thereafter by a stay on the request in accordance with a Stipulation and Agreement between the Tribe, UDEQ and Company. The Company does not consider this action to have any merit. If the stay is lifted, an ALJ is appointed and the petition is successful, the likely outcome would be a requirement to modify or revoke the Mill License amendment. At this time, the Company does not believe any such modification or revocation would materially affect its financial position, results of operations or cash flows. Pinyon Plain Project In March 2013, the Center for Biological Diversity, the Grand Canyon Trust, the Sierra Club and the Havasupai Tribe (the “ Pinyon Plaintiffs ”) filed a complaint in the U.S. District Court for the District of Arizona (the “ District Court ”) against the U.S. Forest Service (“ USFS ”) and the USFS Forest Supervisor for the Kaibab National Forest (together, the “ Defendants ”) seeking an order (a) declaring that the USFS failed to comply with environmental, mining, public land, and historic preservation laws in relation to our Pinyon Plain Project (formerly known as the Canyon Project), (b) setting aside any approvals regarding exploration and mining operations at the Pinyon Plain Project, and (c) directing operations to cease at the Pinyon Plain Project and enjoining the USFS from allowing any further exploration or mining-related activities at the Pinyon Plain Project until the USFS fully complies with all applicable laws. In April 2013, the Pinyon Plaintiffs filed a Motion for Preliminary Injunction, which was later denied by the District Court. In April 2015, the District Court issued its final ruling on the merits in favor of the Defendants and the Company and against the Pinyon Plaintiffs on all counts. The Pinyon Plaintiffs appealed the District Court’s ruling on the merits to the United States Ninth Circuit Court of Appeals (the “ Ninth Circuit ”) and filed motions for an injunction pending appeal with the District Court. Those motions for an injunction pending appeal were denied by the District Court on May 26, 2015. Thereafter, the Pinyon Plaintiffs filed urgent motions for an injunction pending appeal with the Ninth Circuit, which were denied on June 30, 2015. The hearing on the merits was held at the Ninth Circuit on December 15, 2016, which result in a favorable ruling for the Defendants a year later. The Pinyon Plaintiffs petitioned the Ninth Circuit for a rehearing en banc and, on October 25, 2018, the Ninth Circuit panel withdrew its prior opinion and filed a new opinion, which affirmed the prior opinion with one exception to the District Court’s decision. The Ninth Circuit panel reversed itself on its prudential standing analysis as applied to the fourth claim on “valid existing rights,” having initially determined that the Pinyon Plaintiffs lacked standing under the General Mining Law of 1872 (the “ Mining Law ”). The panel remanded the claim back to the District Court to hear on the merits, with the Pinyon Plaintiffs alleging that the USFS did not consider all relevant costs in analyzing whether the Company satisfied the Mining Law’s “prudent person test” in its mineral examination and, thus, erred in concluding that the Company has valid existing rights to operate the Pinyon Plain Mine on lands otherwise subject to a 2012 U.S. Department of Interior withdrawal from location and entry. On May 22, 2020, after the matters were briefed, the District Court issued its final order in favor of the Defendants, which the Pinyon Plaintiffs thereafter appealed to the Ninth Circuit. In December 2020, the Pinyon Plaintiffs filed their Appellant’s Opening Brief with the Ninth Circuit and, in April 2021, the Defendants filed their respective Answering Briefs. Oral arguments were held remotely on August 30, 2021. On February 22, 2022, the Ninth Circuit filed its Opinion in favor of the USFS and the Company. The Pinyon Plaintiffs have the right to request a hearing en banc by the Ninth Circuit, or request a hearing on this matter in front of the U.S. Supreme Court. If the Pinyon Plaintiffs successfully appeal the matter at a rehearing en banc with the Ninth Circuit or successfully appeal the Ninth Circuit’s decision at the U.S. Supreme Court, the Company may be required to maintain the Pinyon Plain Project on standby pending resolution of the matter. Such a prolonged delay of mining activities could have a significant impact on our future operations. Daneros Mine On October 27, 2021, the Company sold the Daneros mine to CUR, in addition to a number of its other non-core conventional uranium assets (see Part I, Item 1, “ Development of the Business – Major Transactions over the Past Five Years ”). Mineral Property Commitments The Company enters into commitments with federal and state agencies and private individuals to lease mineral rights. These leases are renewable annually, and annual renewal costs are expected to total $1.75 million for the year ended December 31, 2022. Surety Bonds The Company has indemnified third-party companies to provide surety bonds as collateral for the Company’s ARO. The Company is obligated to replace this collateral in the event of a default and is obligated to repay any reclamation or closure costs due. As of December 31, 2021, the Company has $20.31 million posted against an undiscounted ARO of $41.34 million (December 31, 2020 - $20.82 million posted against an undiscounted ARO of $41.95 million). Commitments The Company is contractually obligated under a non-material Sales and Agency Agreement appointing an exclusive sales and marketing agent for all vanadium pentoxide produced by the Company.

FAIR VALUE ACCOUNTING

FAIR VALUE ACCOUNTING	12 Months Ended
FAIR VALUE ACCOUNTING	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Accounting	FAIR VALUE ACCOUNTING Assets and liabilities measured at fair value on a recurring basis The following tables set forth the fair value of the Company’s assets and liabilities measured at fair value on a recurring basis (at least annually) by level within the fair value hierarchy as of December 31, 2021. As required by accounting guidance, assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Fair value accounting utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets and liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below: Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities; Level 2 - Quoted prices in markets that are not active, or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (supported by little or no market activity). Our financial instruments include cash and cash equivalents, restricted cash, accounts receivable, accounts payable and current accrued liabilities. These instruments are carried at cost, which approximates fair value due to the short-term maturities of the instruments. Allowances for doubtful accounts are recorded against the accounts receivable balance to estimate net realizable value. The fair value of the Company’s Convertible Debentures are measured at fair value based on the closing price on the TSX (a Level 1 measurement) and changes are recognized in other income (expense). The Company’s investments in marketable equity securities which are exchange traded and are valued using quoted market prices in active markets and as such are classified within Level 1 of the fair value hierarchy. The Company’s investments in marketable debt securities which are exchange-traded and are valued using quoted prices of a pricing service and as such are classified within Level 2 of the fair value hierarchy. The Company’s investments accounted for at fair value consisting of Common Shares are valued using quoted market prices in active markets and as such are classified within Level 1 of the fair value hierarchy. The Company’s investments accounted for at fair value consisting of warrants are valued using the Black-Scholes option model based on observable inputs and as such are classified within Level 2 of the hierarchy. The Company’s warrants are classified as liabilities. The warrants are subject to re-measurement at each balance sheet date, with any change in fair value recognized as a component of other income (expense), net in the Consolidated Statements of Operations and Comprehensive Income (Loss). The warrants issued in September 2016 are classified as Level 1 under the fair value hierarchy using quoted market prices in active markets. As of December 31, 2021 and 2020, the fair values of cash and cash equivalents, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments. December 31, 2021 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 37,407 $ 1,131 $ — $ 38,538 Marketable equity securities (Note 4) 494 — — 494 $ 37,901 $ 1,131 $ — $ 39,032 December 31, 2020 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 779 $ — $ — $ 779 Marketable equity securities (Note 4) 2,247 — — 2,247 Warrant liabilities (Note 12) (8,573) — — (8,573) $ (5,547) $ — $ — $ (5,547) There were no transfers into or out of Level 3 during the year ended December 31, 2021.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
RELATED PARTY TRANSACTIONS	Dec. 31, 2021
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS On May 17, 2017, the Board of Directors of the Company appointed Robert W. Kirkwood and Benjamin Eshleman III to the Board of Directors of the Company. Mr. Kirkwood is a principal of the Kirkwood Companies, including Kirkwood Oil and Gas LLC, Wesco Operating, Inc., and United Nuclear LLC (“ United Nuclear ”). United Nuclear, owns a 19% interest in the Company’s Arkose Mining Venture while the Company owns the remaining 81%. The Company acts as manager of the Arkose Mining Venture and has management and control over operations carried out by the Arkose Mining Venture. The Arkose Mining Venture is a contractual joint venture governed by a venture agreement dated as of January 15, 2008 entered into by Uranerz Energy Corporation, a wholly owned, indirectly held subsidiary of the Company (“ Uranerz ”) and United Nuclear (the “ Venture Agreement ”). United Nuclear contributed $0.31 million, $0.13 million and $0.05 million to the expenses of the Arkose Joint Venture based on the approved budget for the years ended December 31, 2021, 2020 and 2019. On June 1, 2021, Uranerz renewed its Casper, Wyoming-based Office Lease Agreement with Metro, Inc. where Mr. Kirkwood acts as General Manager. The term is for a period of 12 months with rent in the amount of $15,000 paid in $1,250 monthly increments. The original Office Lease Agreement was entered into by the parties on June 1, 2020, for a period of 12 months, with rent in the amount of $12,000 paid in $1,000 monthly increments. Mr. Benjamin Eshleman III is President of Mesteña LLC, which became a shareholder of the Company through the Company’s acquisition of Mesteña Uranium, L.L.C (now Alta Mesa LLC) and certain of its affiliates (collectively, the “ Acquired Companies ”) in June 2016. Pursuant to the purchase agreement, the Alta Mesa Properties held by the Acquired Companies are subject to a royalty of 3.125% of the value of the recovered U 3 O 8 from the Alta Mesa Properties sold at a price of $65.00 per pound or less, 6.25% of the value of the recovered U 3 O 8 from the Alta Mesa Properties sold at a price greater than $65.00 per pound up to and including $95.00 per pound, and 7.5% of the value of the recovered U 3 O 8 from the Alta Mesa Properties sold

REVENUE RECOGNITION AND CONTRAC

REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS	12 Months Ended
REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS	REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS All revenue recognized is a result of contracts with customers either through sales contracts or Alternate Feed Agreements. As of December 31, 2018, the Company had one customer contract with material performance obligations remaining. The Company had not delivered material from its toll processing activities to the customer. The material was delivered in the first half of 2019 and the Company recognized $2.74 million. The Company’s long-term contracts expired following the Company’s 2018 deliveries, and all uranium sales after 2018 will be required to be made at spot prices until the Company enters into new long-term contracts at satisfactory prices in the future. Revenue beyond our current contracts will be affected by both spot and long-term U 3 O 8 price fluctuations which are beyond our control, including: the demand for nuclear power; political and economic conditions; governmental legislation in uranium producing and consuming countries; and production levels and costs of production of other producing companies, as well as fluctuations in the price of vanadium and the price of REEs, both of which are beyond the Company’s control.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
SUBSEQUENT EVENTS	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS Issuance of Stock Options, RSUs, and SARs On January 25, 2022, the Company granted 0.10 million non-incentive stock options with an exercise price of $6.47 per share, 0.33 million RSUs, and 0.83 million SARs at a grant price of $6.47 per share, to its employees and directors. The stock options carry a five-year life and vest as follows: 50% on January 25, 2023; and 50% on January 25, 2024. The RSUs vest as follows: 50% on January 27, 2023; 25% on January 27, 2024; and 25% on January 27, 2025. The SARs have a term of five years vesting only upon the achievement of the following performance goals: as to one-third of the SARs granted, automatically upon the 90-calendar-day VWAP of the Company’s Common Shares on the NYSE American equaling or exceeding US$12.00 for any continuous 90-calendar-day period; as to an additional one-third of the SARs granted, automatically upon the 90-calendar-day VWAP of the Company’s Common Shares equaling or exceeding US$14.00 for any continuous 90-calendar-day period; and as to the final one-third of the SARs granted, automatically upon the 90-calendar-day VWAP of the Company’s Common Shares equaling or exceeding US$16.00 for any continuous 90-calendar-day period. Further, notwithstanding the foregoing vesting schedule, no SARs are able to be exercised by the holder for an initial period of one year from the date of grant; the date first exercisable being January 25, 2023.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Dec. 31, 2021
Accounting Policies [Abstract]
Basis of Accounting	The consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“ U.S. GAAP ”) and are presented in thousands of U.S. dollars (“ USD ”), except for share and per share amounts. Certain footnote disclosures, where indicated, have share prices that are presented in Canadian dollars (“ Cdn$ ”).
Use of Estimates	Use of estimates The Company’s consolidated financial statements have been prepared in accordance with U.S. GAAP. The preparation of the Company's consolidated financial statements requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and the related disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The more significant areas requiring the use of management estimates and assumptions relate to expectations of the future price of uranium and estimates of recoverable mineral resources that are the basis for future cash flow estimates utilized in assessing fair value for business combinations and
Basis of Consolidation	Basis of consolidation These consolidated financial statements include the accounts of the Company together with subsidiaries controlled by the Company. Intercompany transactions, balances and unrealized gains on transactions between the Company and its subsidiaries are eliminated. The functional currency of the Company’s operations is the USD.
Extracting and Recovery Activities while in the Exploration Stage	Extracting and recovery activities while in the development stage The Company extracts or recovers mineralized uranium from mining activities, mill tailings pond solutions, and Alternate Feed Materials, resulting in saleable uranium concentrates from its Mill and, when operating, its Nichols Ranch and Alta Mesa ISR Projects. While the Company has established the existence of multiple Mineral Resources and extracts and processes saleable uranium from these operations, the Company has only established proven or probable Mineral Reserves, as defined under SEC S-K 1300, at its Sheep Mountain Project. While now in a development stage, the Company continues to expense most amounts that would normally be capitalized and subsequently depreciated or depleted over the life of Mineral Reserve-based mining operations on its material properties having only Mineral Resources. Items such as the construction of wellfields and related header houses, additions to recovery facilities and advancement of properties are expensed in the period incurred. As a result, the Company’s consolidated financial statements may not be directly comparable to the financial statements of mining companies in the development stage having multiple Mineral Reserves or in the production stage. The Mill, and certain conventional mining projects in the vicinity of the Mill, and the Nichols Ranch Project (collectively the “ Extracting and Recovery Operations ”) were acquired in two unrelated business combinations. These Extracting and Recovery Operations were recorded at fair value on the date of the respective acquisition and included estimated values which included valuing these assets utilizing the Company’s estimate of future market prices of uranium and expected recoveries of uranium. The values determined included estimated cash flows associated with value beyond proven and probable reserves to develop, extract and recover the estimated saleable uranium concentrates from these operations. The fair value of the Extracting and Recovery Operations recorded on the acquisition date is depreciated on a straight-line basis over the estimated useful life of the components of the operation since the Extracting and Recovery Operations do not have proven or probable reserves. Accordingly, all expenditures incurred subsequent to the acquisition dates relating to the preparation of properties for mineral extraction, expansion of or additions to the Extracting and Recovery Operations are expensed as incurred. This includes expenditures relating to activities such as preparing properties for mineral extraction, construction of mine wellfields, header houses and disposal wells, and additions to the recovery facilities are expensed as incurred as no proven or probable reserves have been established for these uranium projects.
Impairment of Assets	Impairment of assets The Company reviews and evaluates its long-lived assets for impairment when events or changes in circumstances indicate that the related carrying amounts may not be recoverable. Mineral properties are monitored for impairment based on factors such as mineral prices, government regulation and taxation, the Company's continued right to explore the area, exploration reports, assays, technical reports, drill results and its continued plans to fund exploration programs on the property. At each reporting date, the Company reviews its assets to determine whether there is any indication of impairment. If any such indication exists, the asset is tested for impairment. Impairment losses are recognized in profit or loss. Recoverability is measured by comparing the undiscounted future net cash flows to the net book value. When the net book value exceeds future net undiscounted cash flows, the fair value is compared to the net book value and an impairment loss may be measured and recorded based on the excess of the net book value over fair value. Fair value for operating mines is determined using a combined approach, which uses a discounted cash flow model for the existing operations and non-operating properties with available cash flow models and a market approach for the fair value assessment of non-operating and exploration properties where no cash flow model is available. Future cash flows are estimated based on quantities of recoverable mineralized material, expected uranium prices (considering current and historical prices, trends and estimates), production levels, operating costs, capital requirements and reclamation costs, all based on life-of-mine plans. In estimating future cash flows, assets are grouped at the lowest level, for which there are identifiable cash flows that are largely independent of future cash flows from other asset groups. The Company's estimates of future cash flows are based on numerous assumptions, and it is possible that actual future cash flows will be significantly different than the estimates, as actual future
Cash and Cash Equivalents	Cash and cash equivalents Cash and cash equivalents consist of all cash balances and highly liquid investments with an original maturity of three months or less. Because of the short maturity of these investments, the carrying amounts approximate their fair value. Restricted cash is excluded from cash and cash equivalents and is included in other current or long-term assets, depending on the nature of the restriction. See Note 10 for further discussion of restricted cash.
Marketable Securities	Marketable securities Marketable debt securities consist of excess cash invested in U.S. government notes, U.S. government agencies and tradeable certificates of deposits. We have classified and accounted for our marketable debt securities as available-for-sale. After consideration of our risk versus reward objectives, as well as our liquidity requirements, we may sell these debt securities prior to their stated maturities. As we view these securities as available to support current operations, we classify highly liquid securities with maturities beyond 12 months as current assets under the caption marketable securities on the Consolidated Balance Sheet. Subsequent to initial recognition, they are measured at fair value and changes therein, are recognized as a component of other (loss) income in the Consolidated Statements of Operations and Comprehensive Income (Loss). Marketable equity securities consist of investments in publicly traded equity securities. We have classified and accounted for our marketable equity securities as available for sale. Subsequent to initial recognition, they are measured at fair value and changes therein are recognized as a component of other (loss) income in the Consolidated Statements of Operations and Comprehensive Income (Loss).
Accounts Receivable	Accounts Receivables Trade accounts receivable are recorded at the invoiced amount and do not bear interest. The Company evaluates its estimate of expected credit losses based on historical experience and current and forecasted future economic conditions for each portfolio of customers. As of December 31, 2021 and 2020, the Company did not have an allowance for expected credit losses for trade accounts receivable.
Investments at Fair Value	Investments at fair value The Company accounts for investments over which the Company exerts significant influence, but not control, over the financial and operating policies through the fair value option of ASC Topic 825 – Financial Instruments. The Company elects the fair value option based on practical expedience, variances in reporting timelines, and cost-benefit considerations. The cost of such investments is measured at the fair value of the assets given up, shares issued, or liabilities assumed at the date of acquisition plus costs directly attributable to the acquisition. Subsequent to initial recognition, they are measured at fair value. The fair value of the investee’s Common Shares is measured based on its closing market price. The Company uses the Black-Scholes option pricing model to estimate the fair value of its investment in warrants with the following assumptions: (i) the investee’s closing market price on the valuation date, (ii) the risk-free interest rate computed based on the U.S. Treasury yield, (iii) an expected term equal to the remaining contractual term, (iv) a dividend yield of zero, and (v) the expected stock price volatility calculated based on the historical volatility of the Common Shares of the investee. Changes in the fair value of these investments are recognized in Other income (loss) in the Company’s Consolidated Statements of Operations and Comprehensive Income (Loss). At December 31, 2021 and 2020, investments at fair value included the Company's 14.8% and 16.5% investment in Virginia Energy Resources Inc. (“ Virginia Energy ”), respectively, and at December 31, 2021, also included the Company’s 19.1% investment in CUR.
Inventories	Inventories Expenditures related to the extraction and recovery of uranium concentrates and depreciation of the acquisition cost of the Extracting and Recovery Operations are inventoried as stockpiles and in-process and concentrate inventories. Stockpiles are comprised of uranium or uranium/vanadium bearing materials that have been extracted from properties and are available for further processing. Extraction costs are added to the stockpile as incurred and removed from the stockpile based upon the average cost per ton of material extracted. The current portion of material in stockpiles represents the amount expected to be processed in the next twelve months. In-process and concentrate inventories include the cost of the material processed from the stockpile, as well as production costs incurred to extract uranium-bearing fluids from the wellfields, and all costs to recover the uranium into concentrates or process through the Mill. Finished uranium concentrate inventories also include costs of any finished product purchased from the market. Recovery costs typically include labor, chemical reagents and directly attributable mill and plant overhead expenditures. Materials and other supplies held for use in the recovery of uranium and vanadium concentrates are added to the costs of inventories when consumed in the uranium extraction process.
Property, Plant and Equipment	Property, plant and equipment a. Recognition and measurement Property, plant and equipment are measured at cost less accumulated depreciation, and any accumulated impairment losses. Cost includes expenditures that are directly attributable to the acquisition of the asset. Subsequent costs are included in the asset’s carrying amount or recognized as a separate asset, when it is replaced, and the cost of the replacement asset is expensed. b. Depreciation and amortization Depreciation and amortization are calculated on a straight-line basis to their estimated residual value over an estimated useful life which ranges from 3 to 15 years depending upon the asset type. When assets are retired or sold, the resulting gains or losses are reflected in current earnings as a component of other income or expense. Residual values, method of depreciation and useful lives of the assets are reviewed at least annually and adjusted if appropriate. Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows: Buildings 12 - 15 years Storage tanks 15 years Shop tools and equipment 3 - 5 years Mining equipment 5 years Office equipment 4 - 5 years Furniture and fixtures 5 - 7 years Light trucks and utility vehicles 5 years The amortization method, residual values, and useful lives of property, plant and equipment are reviewed annually, and any change in estimate is applied prospectively.
Non-operating Assets	Non-operating assets Non-operating assets consist of mineral properties and rights, along with data and analyses related to the properties, which are in various stages of evaluation and permitting. Costs to acquire the non-operating assets are capitalized at cost or fair value if such assets were a part of a business combination. Mining activities for non-operating assets involve the search for minerals, the determination of technical feasibility and the assessment of commercial viability of an identified resource. Expenditures incurred in relation to such mining activities include costs which are directly attributable to researching and analyzing existing exploration data; conducting geological studies, exploratory drilling and sampling; examining and testing extraction and treatment methods; and completing pre-feasibility and feasibility studies. Such expenditures are expensed as incurred. Mineral properties, that are not held for production, and any related surface access to the minerals generally require periodic payments and/or certain expenditures related to the property in order for the Company to retain its interest in the mineral property (collectively, “ Holding Costs ”). The Company expenses all Holding Costs in the period they are incurred.
Stand-by Properties	Stand-by properties Stand-by properties are mineral properties that have extracted mineral resources in the past but are currently non-operating or properties which could extract mineral resources in the future. Expenditures related to these properties are primarily related to maintaining the assets and permits in a condition that will allow re-start of the operations or development given appropriate commodity prices. All costs related to stand-by assets are expensed as incurred. The Mill operates on a campaign basis. When the Mill is not recovering material, all related costs are expensed as incurred.
Leases	Leases The Company accounts for leases under ASU 2016-02 which requires leases to be recognized as assets and liabilities on the balance sheet for the rights and obligations created by all leases with terms of more than 12 months. The Company recognizes in the balance sheet a liability to make lease payments (the lease liability) and the right-of-use asset representing the right to the underlying asset for the lease term. For leases with a term of twelve months or less, the Company has made an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. See Note 15 for further discussion.
Asset Retirement Obligations	Asset retirement obligations The Company’s asset retirement obligations (“ ARO ”) relate to expected mine, wellfield, plant and mill reclamation and closure activities, as well as costs associated with reclamation of exploration drilling. The Company’s activities are subject to numerous governmental laws and regulations. Estimates of future reclamation liabilities for ARO are recognized in the period when such liabilities are incurred. These estimates are updated on a periodic basis and are subject to changing laws, regulatory requirements, changing technology and other factors which will be recognized when appropriate. Liabilities related to site restoration include long-term treatment and monitoring costs and incorporate total expected costs net of recoveries. Expenditures incurred to dismantle facilities, restore and monitor closed resource properties are charged against the related ARO. As the Company has no proven or probable reserves, such costs, discounted to their present value, are expensed as soon as the obligation to incur such costs arises. The present value of AROs is measured by discounting the expected cash flows using a discount factor that reflects the credit-adjusted risk-free rate of interest, while taking into account an inflation rate. The decommissioning liability is accreted to full value over time through periodic accretion charges recorded to operations as accretion expense. The Company adjusts the estimate of the ARO for changes in the amount or timing of underlying future cash outflows. The impact of these adjustments to the ARO amounts are expensed as incurred.
Loans and Borrowings	Loans and borrowings The Company's Convertible Debentures, all of which were redeemed in 2020, are recognized at fair value through the fair value option based on the closing price on the TSX and changes are recognized in earnings as a component of other income (expense). The Company’s interest-bearing loans and borrowings are measured at amortized cost using the effective interest method.
Warrant Liabilities	Warrant liabilities The Company issued several tranches of warrants for various equity transactions in 2016 all of which were either settled or expired in 2021 and thus no longer outstanding as of December 31, 2021. The Company accounts for its warrants issued in accordance with the U.S. GAAP accounting guidance under FASB ASC Topic 815 Derivative and Hedging (“ ASC 815
Revenue	Revenue a. Sale of goods Revenue from the sale of mineral concentrates is recognized when it is probable that the economic benefits will flow to the Company and delivery has occurred, title has transferred, the sales price and costs incurred with respect to the transaction can be measured reliably, and collectability is reasonably assured. For uranium concentrates, revenue is typically recognized when delivery is evidenced by book transfer at the applicable uranium storage facility. For vanadium concentrates, revenue is typically recognized when delivery is evidenced by book transfer at the applicable vanadium storage facility. For rare earth concentrates, revenue is typically recognized when delivery of the mixed RE Carbonate material has arrived at the applicable separations facility. b. Rendering of services Revenue from the delivery of mineralized material received from the clean-up of a third-party uranium mine or for other Alternate Feed Materials is typically recognized upon delivery to the White Mesa Mill. Revenue from toll milling services is recognized as material is processed in accordance with the specifics of the applicable toll milling agreement. Revenue and unbilled accounts receivable are recorded as related costs are incurred using billing formulas included in the applicable toll milling agreement. Deferred revenues represent proceeds received from processing of toll materials where the Company has not delivered the material to the customer.
Share-Based Compensation	Share-based compensation The Company records share-based compensation awards exchanged for employee services at fair value on the date of the grant and expenses the awards in the Consolidated Statements of Operations and Comprehensive Income (Loss) over the requisite employee service period. The fair value of stock options is determined using the Black-Scholes valuation model. The fair value of RSUs is based on the Energy Fuels’ stock price on the date of grant. The fair value of SARs with performance conditions is based on a Monte Carlo simulation performed by a third-party valuation firm. Share-based compensation expense related to awards with only service conditions having a graded vesting schedule is recorded on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in substance, multiple awards, while expense for all other awards are recognized on a straight-line basis. The Company’s estimates may be impacted by certain variables including, but not limited to, stock price volatility, employee stock option exercise behaviors, additional stock option grants, estimates of forfeitures, the Company's performance, and related tax impacts.
Foreign Currency	Foreign currency Transactions in foreign currencies are translated to the respective functional currency of the Company’s subsidiaries and joint ventures at exchange rates at the dates of the transactions. Monetary assets and liabilities denominated in foreign currencies are translated to the functional currency at the exchange rate as of the reporting date. Non-monetary assets and liabilities that are measured at fair value in a foreign currency are translated to the functional currency at the exchange rate when the fair value was determined. Foreign currency differences are generally recognized in profit or loss. Non-monetary items that are measured based on historical cost in a foreign currency are not translated. The assets and liabilities of entities whose functional currency is not the U.S. dollar are translated into the U.S. dollar at the exchange rate as of the reporting date. The income and expenses of such entities are translated into the U.S. dollar using average exchange rates for the reporting period. Exchange differences on foreign currency translations are recorded in other comprehensive income (loss). The Company’s functional currency is the U.S. dollar.
Income Taxes	Income taxes The Company uses the asset and liability method of accounting for income taxes. Under this method, deferred income tax assets and liabilities are recorded based on differences between the financial statement carrying values of existing assets and liabilities and their respective income tax bases (temporary differences), and losses carried forward. Deferred income tax assets and liabilities are measured using the enacted tax rates which will be in effect when the temporary differences are likely to reverse. The effect on deferred income tax assets and liabilities of a change in tax rates is included in operations in the period in which the change is enacted. The Company records a valuation allowance to reduce deferred income tax assets to the amount that is believed more likely than not to be realized. When the Company concludes that all or part of the deferred income tax assets are not realizable in the future, the Company makes an adjustment to the valuation allowance that is charged to income tax expense in the period such determination is made.
Net Income (Loss) per Share	Net income (loss) per share The Company presents basic and diluted income (loss) per share data for its Common Shares, calculated by dividing the income (loss) attributable to common shareholders of the Company by the weighted average number of Common Shares outstanding during the period. Diluted income (loss) per share is determined by adjusting the income (loss) attributable to common shareholders and the weighted average number of Common Shares outstanding for the effects of all potential dilutive instruments.
Recently Adopted & Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements Non-employee Share-Based Payment In June 2018, the FASB issued ASU 2018-07, which more closely aligns the accounting for non-employee share-based payment transactions to the guidance for awards to employees except for specific guidance on certain inputs to an option-pricing model and the attribution of cost. The Company adopted this standard effective January 1, 2019 and adoption did not have a significant impact on our net earnings. Fair Value Measurement In August 2018, the FASB issued ASU 2018-13, which amended the fair value measurement guidance by removing and modifying certain disclosure requirements, while also adding new disclosure requirements. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty would be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments would be applied retrospectively to all periods presented upon their effective date. The Company adopted this pronouncement effective January 1, 2020. Income Taxes - Simplifying the Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, “Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740),” which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. ASU 2019-12 will be effective for interim and annual periods beginning after December 15, 2020 (January 1, 2021 for the Company). Early adoption is permitted. The Company has evaluated the impact the of the adoption of ASU 2019-12 and it does not have an impact on its consolidated financial statements, and may not have an impact until such a time that the Company incurs income tax expenses. Financial Instruments - Credit Losses

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Dec. 31, 2021
Accounting Policies [Abstract]
Schedule of Property, Plant and Equipment Useful Lives	Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows: Buildings 12 - 15 years Storage tanks 15 years Shop tools and equipment 3 - 5 years Mining equipment 5 years Office equipment 4 - 5 years Furniture and fixtures 5 - 7 years Light trucks and utility vehicles 5 years The following is a summary of property, plant and equipment: December 31, 2021 December 31, 2020 Cost Accumulated Net Book Value Cost Accumulated Net Book Property, plant and equipment Nichols Ranch $ 29,210 $ (18,185) $ 11,025 $ 29,210 $ (16,150) $ 13,060 Alta Mesa 13,626 (4,996) 8,630 13,626 (4,088) 9,538 Equipment and other 15,079 (12,751) 2,328 13,528 (12,505) 1,023 Property, plant and equipment total $ 57,915 $ (35,932) $ 21,983 $ 56,364 $ (32,743) $ 23,621

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	12 Months Ended
MARKETABLE SECURITIES (Tables)	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Marketable Securities	The following tables summarize our marketable securities by significant investment categories as of December 31, 2021: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable equity securities $ 756 $ (262) $ — $ 494 The following tables summarize our marketable securities by significant investment categories as of December 31, 2020: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable equity securities $ 824 $ (418) $ 1,841 $ 2,247

RECEIVABLES (Tables)

RECEIVABLES (Tables)	12 Months Ended
RECEIVABLES (Tables)	Dec. 31, 2021
Receivables [Abstract]
Summary of Trade, and Notes Receivables	December 31, 2021 December 31, 2020 Trade receivables $ 1,858 $ 385 Other 1,753 441 Notes receivable, net 343 343 $ 3,954 $ 1,169

INVENTORIES (Tables)

INVENTORIES (Tables)	12 Months Ended
INVENTORIES (Tables)	Dec. 31, 2021
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	December 31, 2021 December 31, 2020 Concentrates and work-in-progress (1) $ 27,619 $ 25,768 Inventory of ore in stockpiles 351 241 Raw materials and consumables 4,170 2,912 $ 32,140 $ 28,921 Inventories - by duration Current $ 30,772 $ 27,575 Long term - raw materials and consumables 1,368 1,346 $ 32,140 $ 28,921

INVESTMENTS ACCOUNTED FOR AT _2

INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Tables)	12 Months Ended
INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Tables)	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	September 30, 2021 Current assets $ 16,733 Non-current assets $ 11,455 Current liabilities $ 3,119 Non-current liabilities $ 27 Nine months ended September 30, 2021 Loss from continuing operations, net loss, and net loss attributable to the entity $ (3,665) September 30, 2021 September 30, 2020 Current assets $ 548 $ 808 Non-current assets $ 3,753 $ 2,986 Current liabilities $ 278 $ 537 Non-current liabilities $ 2 $ 2 Twelve months ended September 30, 2021 2020 2019 Loss from continuing operations, net loss, and net loss attributable to the entity $ (275) $ (20,150) $ (279) December 31, 2021 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 37,407 $ 1,131 $ — $ 38,538 Marketable equity securities (Note 4) 494 — — 494 $ 37,901 $ 1,131 $ — $ 39,032 December 31, 2020 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 779 $ — $ — $ 779 Marketable equity securities (Note 4) 2,247 — — 2,247 Warrant liabilities (Note 12) (8,573) — — (8,573) $ (5,547) $ — $ — $ (5,547)

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows: Buildings 12 - 15 years Storage tanks 15 years Shop tools and equipment 3 - 5 years Mining equipment 5 years Office equipment 4 - 5 years Furniture and fixtures 5 - 7 years Light trucks and utility vehicles 5 years The following is a summary of property, plant and equipment: December 31, 2021 December 31, 2020 Cost Accumulated Net Book Value Cost Accumulated Net Book Property, plant and equipment Nichols Ranch $ 29,210 $ (18,185) $ 11,025 $ 29,210 $ (16,150) $ 13,060 Alta Mesa 13,626 (4,996) 8,630 13,626 (4,088) 9,538 Equipment and other 15,079 (12,751) 2,328 13,528 (12,505) 1,023 Property, plant and equipment total $ 57,915 $ (35,932) $ 21,983 $ 56,364 $ (32,743) $ 23,621
Schedule of Summary of Mineral Properties	The following is a summary of mineral properties: December 31, 2021 December 31, 2020 Mineral properties Uranerz ISR properties $ 25,974 $ 25,974 Sheep Mountain 34,183 34,183 Roca Honda 22,095 22,095 Other 1,287 1,287 Mineral properties total $ 83,539 $ 83,539

ASSET RETIREMENT OBLIGATIONS _2

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)	12 Months Ended
ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)	Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Change in Asset Retirement Obligation	The following table summarizes the Company’s asset retirement obligations: December 31, 2021 December 31, 2020 Asset retirement obligation, beginning of period $ 13,038 $ 18,972 Revision of estimate (235) (7,845) Disposal of non-core obligations (269) — Accretion of liabilities 1,284 1,911 Settlements (131) — Asset retirement obligation, end of period $ 13,687 $ 13,038 Asset retirement obligation: Current $ 27 $ 131 Non-current 13,660 12,907 Asset retirement obligation, end of period $ 13,687 $ 13,038
Schedule of Restricted Cash and Cash Equivalents	The following table summarizes the Company’s restricted cash: December 31, 2021 December 31, 2020 Restricted cash, beginning of period $ 20,817 $ 20,081 Additional collateral posted 48 768 Refunds of collateral (560) (32) Restricted cash, end of period $ 20,305 $ 20,817

CAPITAL STOCK (Tables)

CAPITAL STOCK (Tables)	12 Months Ended
CAPITAL STOCK (Tables)	Dec. 31, 2021
Stockholders' Equity Note [Abstract]
Schedule of Stockholders' Equity Note, Warrants or Rights	The following table summarizes the Company’s share purchase warrants denominated in U.S. dollars. These warrants are accounted for as derivative liabilities, as the functional currency of the entity issuing the warrants, Energy Fuels Inc., is Cdn$. Month Issued Expiry Date Exercise Price Warrants Fair value at September 2016 (1) September 20, 2021 2.45 — $ — (1) The warrants issued in September 2016 are classified as Level 1 under the fair value hierarchy (Note 19). Each warrant was exercisable until September 20, 2021 and entitled the holder thereof to acquire one common share upon exercise at an exercise price of $2.45 per common share. These warrants are accounted for as a derivative liability, as the functional currency of the entity issuing the warrant is Cdn$.

BASIC AND DILUTED LOSS PER CO_2

BASIC AND DILUTED LOSS PER COMMON SHARE (Tables)	12 Months Ended
BASIC AND DILUTED LOSS PER COMMON SHARE (Tables)	Dec. 31, 2021
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	The following is a reconciliation of weighted average Common Shares outstanding for the years ended December 31, 2021, 2020, 2019, respectively: Years ended December 31, 2021 2020 2019 Issued shares at beginning of period 134,311,033 100,735,889 91,445,066 Effect of stock options exercised 474,072 12,934 45,040 Effect of shares issued for settlement of vesting of restricted stock units 443,364 452,932 786,746 Effect of shares issued for settlement of exercises of stock appreciation rights 2,316 — — Effect of shares issued for exercise of share purchase warrants 1,737,981 — 1,057 Shares issued for consulting services 35,933 74,672 46,067 Effect of shares issued to settle liabilities — — 141,525 Effect of shares issued in public offerings 9,899,825 19,891,709 3,199,866 Weighted average common shares outstanding 146,904,524 121,168,136 95,665,367
Schedule of Earnings Per Share, Basic and Diluted	The calculation of basic and diluted income (loss) per share after adjustment for the effects of all potential dilutive Common Shares, calculated as follows: Years ended December 31, 2021 2020 2019 Net income (loss) attributable to owners of the Company $ 1,541 $ (27,776) $ (37,978) Basic weighted average common shares outstanding 146,904,524 121,168,136 95,665,367 Dilutive impact of stock options, restricted stock units, and warrants 2,816,593 — — Diluted weighted average common shares outstanding 149,721,117 121,168,136 95,665,367 Basic net income (loss) per common share $ 0.01 $ (0.23) $ (0.40) Diluted net income (loss) per common share $ 0.01 $ (0.23) $ (0.40)

SHARE-BASED PAYMENTS (Tables)

SHARE-BASED PAYMENTS (Tables)	12 Months Ended
SHARE-BASED PAYMENTS (Tables)	Dec. 31, 2021
Share-based Payment Arrangement [Abstract]
Schedule of share-based compensation, stock options, activity	The summary of the Company’s stock options at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Range of Exercise Prices Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2018 $1.70 - $15.61 1,732,754 $ 3.84 Granted 2.92 296,450 2.92 Exercised 1.70 - 2.92 (54,805) 2.27 Forfeited 1.70 - 7.42 (342,866) 3.94 Expired 6.97 (144,100) 6.97 Outstanding, December 31, 2019 $1.70 - $15.61 1,487,433 $ 3.43 Granted 1.76 - 3.06 711,414 1.77 Exercised 1.70 - 2.92 (302,707) 1.97 Forfeited 1.70 - 5.18 (188,541) 3.26 Expired 4.12 - 5.22 (98,512) $ 4.40 Outstanding, December 31, 2020 $1.70 - $15.61 1,609,087 $ 2.91 Granted 3.89 - 8.41 169,310 3.99 Exercised 1.70 - 7.42 (775,814) 2.95 Forfeited 1.76 - 5.91 (8,048) 3.16 Expired 1.70 - 15.61 (51,653) 8.14 Outstanding, December 31, 2021 $1.70 - $8.41 942,882 $ 2.79 2.50 $ 4,565 Exercisable, December 31, 2021 $1.70 - $7.14 729,565 $ 2.83 2.22 $ 3,504
Schedule of compensation costs for share-based payment arrangements	The components of share-based compensation are as follows: Years ended December 31, 2021 2020 2019 Recognized expense Stock options $ 323 $ 555 $ 453 RSU awards (1) 1,562 1,272 2,006 SARs 273 771 1,312 Total recognized expense $ 2,158 $ 2,598 $ 3,771 (1) The fair value of the RSUs granted under the Compensation Plan for the years ended December 31, 2021, 2020 and 2019, was estimated at the date of grant, using the stated market price.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of the stock options granted under the Compensation Plan for the years ended December 31, 2021, 2020 and 2019 was estimated at the date of grant, using the Black-Scholes Option Valuation Model, with the following weighted average assumptions: Years ended December 31, 2021 2020 2019 Risk-free interest rate 0.44 % 1.27 % 2.62 % Expected life (in years) 5.0 years 4.6 years 5.0 years Expected volatility 61.96 % 61.81 % * 59.38 % * Expected dividend yield 0 % 0 % 0 % Weighted average grant date fair value $ 2.06 $ 0.82 $ 1.54 * Expected volatility is measured based on the Company’s historical share price volatility over a period equivalent to the expected life of the stock options.
Schedule of share-based compensation, restricted stock and restricted stock units activity	The summary of the Company’s non-vested stock options at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2018 297,044 $ 1.06 Granted 296,450 1.54 Vested (356,626) 1.27 Forfeited (13,487) 1.59 Non-vested, December 31, 2019 223,381 $ 1.32 Granted 711,414 0.82 Vested (508,630) 0.94 Forfeited (22,175) 0.96 Non-vested, December 31, 2020 403,990 $ 0.94 Granted 169,310 2.06 Vested (351,934) 1.23 Forfeited (8,049) 1.60 Non-vested, December 31, 2021 213,317 $ 1.34 The summary of the Company’s non-vested RSUs at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2018 1,580,187 $ 1.99 Granted 731,435 2.91 Vested (862,378) 2.00 Forfeited (133,708) 2.40 Non-vested, December 31, 2019 1,315,536 $ 2.45 Granted 740,998 1.65 Vested (746,477) 2.45 Forfeited (216,001) 2.13 Non-vested, December 31, 2020 1,094,056 $ 1.98 Granted 441,241 3.89 Vested (635,233) 1.94 Forfeited — — Non-vested, December 31, 2021 900,064 $ 2.94
Share-based Payment Arrangement, Stock Appreciation Right, Activity	The summary of the Company’s SARs at December 31, 2021, 2020 and 2019, respectively, and the changes for the fiscal periods ending on those dates, are presented below: Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2018 — $ — Granted 2,195,994 2.92 Exercised — — Forfeited (30,485) 2.92 Expired — — Outstanding, December 31, 2019 2,165,509 $ 2.92 Granted — — Exercised — — Forfeited (444,886) 2.92 Expired — — Outstanding, December 31, 2020 1,720,623 $ 2.92 Granted — — Exercised (48,201) 2.92 Forfeited — — Expired — — Outstanding, December 31, 2021 1,672,422 $ 2.92 2.06 $ 7,877 Exercisable, December 31, 2021 1,098,873 $ 2.92 2.06 $ 5,176 Number of Shares Weighted Average Grant Date Fair Value Non-vested December 31, 2018 — $ — Granted 2,195,994 1.25 Vested — — Forfeited (30,485) 1.25 Non-vested December 31, 2019 2,165,509 $ 1.25 Granted — — Vested — — Forfeited (444,886) 1.25 Non-vested December 31, 2020 1,720,623 $ 1.25 Granted — — Vested (1,147,074) 1.27 Forfeited — — Non-vested December 31, 2021 573,549 $ 1.19

LEASES (Tables)

LEASES (Tables)	12 Months Ended
LEASES (Tables)	Dec. 31, 2021
Leases [Abstract]
Lease Costs	Total lease cost includes the following components: Years ended December 31, 2021 2020 2019 Operating leases $ 308 $ 339 $ 381 Short-term leases 324 297 297 Sublease income — — (56) Total lease expense $ 632 $ 636 $ 622 The weighted average remaining lease term and weighted average discount rate were as follows: Years ended December 31, 2021 2020 2019 Weighted average remaining lease term of operating leases 1.4 years 2.4 years 3.3 years Weighted average discount rate of operating leases 9.0 % 9.0 % 9.0 % Supplemental cash flow information related to leases was as follows: Years ended December 31, 2021 2020 2019 Operating cash flow information: Cash paid for amounts included in the measurement of operating lease liabilities $ 343 $ 367 $ 333
Operating Lease Future Minimum Payments	Future minimum payments of operating lease liabilities as of December 31, 2021 are as follows: Years ending December 31: 2022 $ 350 2023 147 2024 — 2025 — 2026 — Thereafter — Total lease payments $ 497 Less: Interest (28) Present value of lease liabilities $ 469

INCOME TAXES (Tables)

INCOME TAXES (Tables)	12 Months Ended
INCOME TAXES (Tables)	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	A reconciliation of income tax expense and the product of accounting income before income tax, multiplied by the combined Canadian federal and provincial income tax rate (the rate applicable to the Canadian parent company) is as follows: Years ended December 31, 2021 2020 2019 Income (Loss) before income taxes $ 1,448 $ (27,872) $ (38,094) Combined federal and provincial rate 26.50 % 26.50 % 26.50 % Expected income tax recovery $ 384 $ (7,385) $ (10,095) Share-based compensation (89) 565 985 Other non-deductible/non-taxable items 159 1,985 (376) Unrecognized deferred tax assets (454) 4,835 9,486 Income tax expense $ — $ — $ —
Schedule of Deferred Tax Assets and Liabilities	The components of the net deferred tax assets and liabilities as of December 31, 2021 and 2020 are as follows: Years ended December 31, 2021 2020 Deferred tax assets Inventories $ 6,380 $ 7,051 Short-term investments 209 209 Operating loss carry forwards 101,345 95,060 Capital loss carry forwards 914 843 Deferred revenue and other 1,520 2,057 Mineral properties and deferred costs, United States 18,682 24,794 Mineral properties and deferred costs, Canada 1,884 1,760 Asset retirement obligations 3,627 3,455 Property, plant and equipment 942 1,806 Total deferred tax assets $ 135,503 $ 137,035 Less: valuation allowance (135,503) (137,035) Net deferred tax assets $ — $ —
Summary of Valuation Allowance	The following table summarizes the changes to the valuation allowance: For the Years Ended Balance Balance December 31, Beginning of Period Additions (a) Deductions (b) End of Period 2021 $ 137,035 $ 6,653 $ (8,185) $ 135,503 2020 $ 131,554 $ 7,140 $ (1,659) $ 137,035 a) The 2021 additions to the valuation allowance result from additional losses incurred and increases to other tax assets such as reclamation obligations. Management does not feel these additions meet the more-likely-than-not criterion for recognition. b) The 2021 reductions to the valuation allowance result primarily from the decreases to other tax assets such as property, plant and equipment and mineral properties.
Summary of Operating Loss Carryforwards	The following table summarizes the Company's capital losses and net operating losses as of December 31, 2021 that can be applied against future taxable profit. Country Type Amount Expiry Date Canada Non-capital losses $ 49,737 2027 - 2039 Canada Allowable capital losses 3,450 None Canada Investment tax credits 1,254 2023-2027 United States Pre-2018 net operating losses 292,139 2026-2036 United States Post-2017 net operating losses 40,562 None United States US Excess Interest Carryforward 11 None
Schedule of Income before Income Tax, Domestic and Foreign	For financial reporting purposes, income before taxes includes the following components: Years ended December 31, 2021 2020 2019 Canada $ (7,549) $ (10,407) $ (4,174) Foreign 8,997 (17,465) (33,920) Total $ 1,448 $ (27,872) $ (38,094)

SUPPLEMENTAL FINANCIAL INFORM_2

SUPPLEMENTAL FINANCIAL INFORMATION (Tables)	12 Months Ended
SUPPLEMENTAL FINANCIAL INFORMATION (Tables)	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Other Nonoperating Income (Expense)	The components of other income (loss) are as follows: Years ended December 31, 2021 2020 2019 Interest income $ 44 $ 153 $ 482 Change in value of investments accounted for at fair value 7,106 1,835 (153) Change in value of warrant liabilities (8,078) (5,436) 3,726 Change in value of Convertible Debentures — 155 291 Foreign exchange gain (loss) (128) 767 (46) Department of Energy awards (1) 1,900 — — Other 350 233 (322) Other income (loss) $ 1,194 $ (2,293) $ 3,978 (1) See Part II, Item 7 " Outlook : Update on Rare Earth Element Initiative ."
Schedule of Accounts Payable and Accrued Liabilities	The components of accounts payable and accrued liabilities are as follows: December 31, 2021 December 31, 2020 Accounts payable $ 3,038 $ 1,108 Payroll liabilities 1,988 1,512 Other accrued liabilities 738 701 Accounts payable and accrued liabilities $ 5,764 $ 3,321

FAIR VALUE ACCOUNTING (Tables)

FAIR VALUE ACCOUNTING (Tables)	12 Months Ended
FAIR VALUE ACCOUNTING (Tables)	Dec. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	September 30, 2021 Current assets $ 16,733 Non-current assets $ 11,455 Current liabilities $ 3,119 Non-current liabilities $ 27 Nine months ended September 30, 2021 Loss from continuing operations, net loss, and net loss attributable to the entity $ (3,665) September 30, 2021 September 30, 2020 Current assets $ 548 $ 808 Non-current assets $ 3,753 $ 2,986 Current liabilities $ 278 $ 537 Non-current liabilities $ 2 $ 2 Twelve months ended September 30, 2021 2020 2019 Loss from continuing operations, net loss, and net loss attributable to the entity $ (275) $ (20,150) $ (279) December 31, 2021 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 37,407 $ 1,131 $ — $ 38,538 Marketable equity securities (Note 4) 494 — — 494 $ 37,901 $ 1,131 $ — $ 39,032 December 31, 2020 Level 1 Level 2 Level 3 Total Investments accounted for at fair value (Note 7) $ 779 $ — $ — $ 779 Marketable equity securities (Note 4) 2,247 — — 2,247 Warrant liabilities (Note 12) (8,573) — — (8,573) $ (5,547) $ — $ — $ (5,547)

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	Oct. 27, 2021	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Operating lease right of use asset		$ 408	$ 662
Present value of lease liabilities		$ 469
Virginia Uranium, Inc.
Property, Plant and Equipment [Line Items]
Percentage of fair value investment		14.80%	16.50%
Consolidated Uranium Inc.
Property, Plant and Equipment [Line Items]
Percentage of fair value investment	19.90%	19.10%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Depreciation (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)		3 years
Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)		15 years
Buildings \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	12 years
Buildings \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	15 years
Storage tanks
Property, Plant and Equipment [Line Items]
Useful life (in years)	15 years
Shop tools and equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	3 years
Shop tools and equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years
Mining equipment
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years
Office equipment \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	4 years
Office equipment \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years
Furniture and fixtures \| Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years
Furniture and fixtures \| Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	7 years
Light trucks and utility vehicles
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years

MARKETABLE SECURITIES - Schedul

MARKETABLE SECURITIES - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 494	$ 2,247
Marketable equity securities
Debt Securities, Available-for-sale [Line Items]
Cost Basis	756	824
Gross Unrealized losses	(262)	(418)
Gross Unrealized gains	0	1,841
Fair Value	$ 494	$ 2,247

RECEIVABLES (Details)

RECEIVABLES (Details) $ in Thousands	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Nov. 07, 2018USD ($)	Dec. 31, 2016note	Dec. 31, 2015USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivables	$ 1,858	$ 385
Other	1,753	441
Notes receivable, net	343	343
Total receivables	3,954	1,169
Number of Note Receivables \| note					2
Financing receivable, principal amount			$ 500	$ 550		$ 1,050
Financing receivable, reserve against collectability	220	$ 220
Consolidated Uranium Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other	$ 1,680

INVENTORIES - Schedule of Inven

INVENTORIES - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Concentrates and work-in-progress	$ 27,619	$ 25,768
Inventory of ore in stockpiles	351	241
Raw materials and consumables	4,170	2,912
Inventory, net	32,140	28,921
Current	30,772	27,575
Long term - raw materials and consumables	$ 1,368	$ 1,346

INVENTORIES - Narrative (Detail

INVENTORIES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
INVENTORIES - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Inventory Disclosure [Abstract]
Impairment loss	$ 0	$ 1,640

INVESTMENTS ACCOUNTED FOR AT _3

INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Details) - USD ($) $ in Thousands	Oct. 27, 2021	Dec. 31, 2021	Dec. 31, 2020
Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of fair value investment		14.80%	16.50%
Gain (Loss) on Investments		$ 5,590
Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of fair value investment	19.90%	19.10%
Gain (Loss) on Investments		$ 720
Level 1 \| Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value		6,310	$ 780
Level 1 \| Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value		$ 32,230

INVESTMENTS ACCOUNTED FOR AT _4

INVESTMENTS ACCOUNTED FOR AT FAIR VALUE - Schedule of Fair Value Investments (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current assets				$ 149,305	$ 52,472
Current liabilities				$ 6,115	$ 12,314
Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current assets	$ 16,733
Non-current assets	11,455
Current liabilities	3,119
Non-current liabilities	27
Loss from continuing operations, net loss, and net loss attributable to the entity	(3,665)
Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Current assets	548	$ 808
Non-current assets	3,753	2,986
Current liabilities	278	537
Non-current liabilities	2	2
Loss from continuing operations, net loss, and net loss attributable to the entity	$ (275)	$ (20,150)	$ (279)

PROPERTY, PLANT AND EQUIPMENT_3

PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Cost	$ 57,915	$ 56,364
Accumulated Depreciation	(35,932)	(32,743)
Net Book Value	21,983	23,621
Nichols Ranch
Property, Plant and Equipment [Line Items]
Cost	29,210	29,210
Accumulated Depreciation	(18,185)	(16,150)
Net Book Value	11,025	13,060
Alta Mesa
Property, Plant and Equipment [Line Items]
Cost	13,626	13,626
Accumulated Depreciation	(4,996)	(4,088)
Net Book Value	8,630	9,538
Equipment and other
Property, Plant and Equipment [Line Items]
Cost	15,079	13,528
Accumulated Depreciation	(12,751)	(12,505)
Net Book Value	$ 2,328	$ 1,023

PROPERTY, PLANT AND EQUIPMENT_4

PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Narrative) (Details)	Nov. 22, 2021USD ($)$ / sharesshares	Oct. 27, 2021USD ($)shares	Oct. 27, 2021CAD ($)$ / shares	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Property, Plant and Equipment [Line Items]
Sales and property tax refunds		$ 35,730,000
Settlement of Asset Retirement Obligations Through Noncash Payments, Amount		$ 270,000
Disposal Group, Shares Received In Transaction \| shares	1,875,085	11,860,101
Disposal Group, Shares Received In Transaction, Price Per Share \| $ / shares			$ 2.95
Disposal Group, Production Payment Commitment			$ 5,000,000
Disposal Group, Warrants Issued \| shares	937,542
Disposal Group, Warrants Issued, Price Per Share \| $ / shares	$ 4
Disposal Group, Proceeds For Payment Agreement	$ 1,970,000
Second Payment
Property, Plant and Equipment [Line Items]
Disposal Group, Deferred Cash Receivable			3,000,000
Third Payment
Property, Plant and Equipment [Line Items]
Disposal Group, Deferred Cash Receivable			$ 3,000,000
Consolidated Uranium Inc.
Property, Plant and Equipment [Line Items]
Proceeds from Sale of Productive Assets		$ 2,000,000
Percentage of fair value investment		19.90%		19.10%
Nichols Ranch
Property, Plant and Equipment [Line Items]
Depreciation				$ 0	$ 510,000

PROPERTY, PLANT AND EQUIPMENT_5

PROPERTY, PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Summary of Mineral Properties (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Mineral properties	$ 83,539	$ 83,539
Uranerz ISR properties
Property, Plant and Equipment [Line Items]
Mineral properties	25,974	25,974
Sheep Mountain
Property, Plant and Equipment [Line Items]
Mineral properties	34,183	34,183
Roca Honda
Property, Plant and Equipment [Line Items]
Mineral properties	22,095	22,095
Other
Property, Plant and Equipment [Line Items]
Mineral properties	$ 1,287	$ 1,287

IMPAIRMENTS (Details)

IMPAIRMENTS (Details) - USD ($)	12 Months Ended
IMPAIRMENTS (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment of plant and equipment and mineral properties	$ 0	$ 0	$ 0

ASSET RETIREMENT OBLIGATIONS _3

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Schedule of Change in Asset Retirement Obligation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligation, beginning of period	$ 13,038	$ 18,972
Revision of estimate	(235)	(7,845)
Disposal of non-core obligations	(269)	0
Accretion of liabilities	1,284	1,911	$ 1,931
Settlements	(131)	0
Asset retirement obligation, end of period	13,687	13,038	18,972
Asset Retirement Obligation [Abstract]
Current	27	131
Non-current	13,660	12,907
Asset retirement obligation, end of period	$ 13,687	$ 13,038	$ 18,972

ASSET RETIREMENT OBLIGATIONS _4

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Narrative (Details) - USD ($) $ in Thousands	Oct. 27, 2021	Dec. 31, 2021	Dec. 31, 2020
Schedule of Asset Retirement Obligations [Line Items]
Undiscounted decommissioning liability		$ 41,340	$ 41,950
Revision of estimate		$ 235	$ 7,845
Settlement of Asset Retirement Obligations Through Noncash Payments, Amount	$ 270
Minimum
Schedule of Asset Retirement Obligations [Line Items]
Risk Free Rate		9.50%
Inflation rate		2.00%
Maximum
Schedule of Asset Retirement Obligations [Line Items]
Risk Free Rate		11.67%
Inflation rate		2.41%

ASSET RETIREMENT OBLIGATIONS _5

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restricted Cash And Cash Equivalents [Roll Forward]
Restricted cash, beginning of period	$ 20,817	$ 20,081
Refunds of collateral	(560)	(32)
Collateral Already Posted, Aggregate Fair Value	48	768
Restricted cash, end of period	$ 20,305	$ 20,817

LOANS AND BORROWINGS - Narrativ

LOANS AND BORROWINGS - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Thousands	Oct. 06, 2020CAD ($)	Jul. 14, 2020CAD ($)	Aug. 04, 2016$ / shares	Jul. 24, 2012CAD ($)shares	Dec. 31, 2021USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Oct. 06, 2020USD ($)	Aug. 03, 2016$ / shares
Debt Instrument [Line Items]
Public offering of floating-rate convertible unsecured subordinated debentures (in shares) \| shares				22
Price per debenture issuance				$ 1,000
Proceeds from issuance of debt				$ 21,550,000
Conversion price per share \| $ / shares			$ 4.15						$ 15
Price Of Aggregate Principal Amount Redeemed, Percent			101.00%
Change in value of Convertible Debentures					$ 0	$ 155	$ 291
Convertible Debentures \| Convertible Debt
Debt Instrument [Line Items]
Number of days notice to redeem debentures			30 days
Repayments of Convertible Debt	$ 10,430,000	$ 10,430,000
Convertible Subordinated Debt		$ 20,860,000						$ 7,820
Principal amount purchased plus accrued and unpaid interest		101.00%						101.00%

CAPITAL STOCK - Narrative (Deta

CAPITAL STOCK - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 20, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 20, 2021	Mar. 14, 2019	Dec. 31, 2018
Class of Warrant or Right [Line Items]
Shares issued (in shares)		156,262,199	134,311,033	100,735,889			91,445,066
Number of warrants outstanding (in shares)					149,807	2,328,925
At The Market Sale Of Stock
Class of Warrant or Right [Line Items]
Sale of Stock, Number of Shares Issued in Transaction		16,627,512	21,361,784	8,043,365
Sale of stock consideration received		$ 106,210	$ 37,250	$ 19,680
Public Offering
Class of Warrant or Right [Line Items]
Sale of Stock, Price Per Share	$ 1.47
Shares issued (in shares)	11,300,000
Sale of stock consideration received	$ 15,140

CAPITAL STOCK - Schedule of Sto

CAPITAL STOCK - Schedule of Stockholders' Equity Note, Warrants or Rights (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Sep. 20, 2021	Mar. 14, 2019
Class of Warrant or Right [Line Items]
Number of warrants outstanding (in shares)		149,807	2,328,925
Share Purchase Warrants Denominated in United States Dollars \| September 20, 2021 Expiration Date
Class of Warrant or Right [Line Items]
Exercise price of warrants (in dollars per share)	$ 2.45
Number of warrants outstanding (in shares)	0
Fair value of warrants	$ 0

BASIC AND DILUTED LOSS PER CO_3

BASIC AND DILUTED LOSS PER COMMON SHARE - Schedule of Weighted Average Shares (Details) - shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Issued common shares at beginning of period (in shares)	134,311,033	100,735,889	91,445,066
Effect of stock options exercised	474,072	12,934	45,040
Effect of shares issued for settlement of vesting of restricted stock units	443,364	452,932	786,746
Effect of shares issued for settlement of exercises of stock appreciation rights	2,316	0	0
Effect of shares issued for exercise of share purchase warrants	1,737,981	0	1,057
Shares issued for consulting services	35,933	74,672	46,067
Effect of shares issued to settle liabilities	0	0	141,525
Basic weighted average number of common shares outstanding (in shares)	146,904,524	121,168,136	95,665,367
Public Offerings
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Effect of shares issued in public offerings	9,899,825	19,891,709	3,199,866

BASIC AND DILUTED LOSS PER CO_4

BASIC AND DILUTED LOSS PER COMMON SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income (loss) attributable to owners of the Company	$ 1,541	$ (27,776)	$ (37,978)
Basic weighted average number of common shares outstanding (in shares)	146,904,524	121,168,136	95,665,367
Diluted weighted average number of common shares outstanding (in shares)	2,816,593	0	0
Basic and diluted weighted average number of common shares outstanding (in shares)	149,721,117	121,168,136	95,665,367
Net income (loss) per Basic share (in dollars per share)	$ 0.01	$ (0.23)	$ (0.40)
Diluted net income (loss) per common share (in dollars per share)	$ 0.01	$ (0.23)	$ (0.40)

BASIC AND DILUTED LOSS PER CO_5

BASIC AND DILUTED LOSS PER COMMON SHARE - Narrative (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	60	6,870	6,970

SHARE-BASED PAYMENTS - Narrativ

SHARE-BASED PAYMENTS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable options, weighted average remaining contractual term	2 years 2 months 19 days
Number of options (in shares)	942,882	1,609,087	1,487,433	1,732,754
Number of exercisable options (in shares)	729,565
Outstanding options, weighted average exercise price (in dollars per share)	$ 2.79	$ 2.91	$ 3.43	$ 3.84
Number of exercises in period (in shares)	775,814	302,707	54,805
Stock exercised, intrinsic value	$ 2,880	$ 420	$ 50
Grants in period, weighted average exercise price (in dollars per share)	$ 3.99	$ 1.77	$ 2.92
Exercise price (in USD per share)	$ 2.95	$ 1.97	$ 2.27
Cash received from exercise of stock options	$ 2,375	$ 491	$ 146
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	15,626,220
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Award exercise period	5 years
Unrecognized compensation costs related to unvested stock options	$ 60
Recognition period for unrecognized compensation costs	1 year 1 month 17 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Number of RSUs granted in period (in shares)	440,000	740,000	730,000
Grants in period, grant date intrinsic value (in dollars per share)	$ 2,670,000	$ 1,210,000	$ 2,510,000
Unrecognized compensation costs related to RSU awards	$ 680
Recognition period for unrecognized compensation costs	1 year 8 months 1 day
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			5 years
Stock options granted in period (in shares)	0	0	2,200,000
Grants in period, weighted average exercise price (in dollars per share)			$ 1.25
Unrecognized compensation costs related to RSU awards	$ 0
Recognition period for unrecognized compensation costs	0 days
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Issued	5,643
Exercised (in shares)	(48,201)	0	0
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercised, Aggregate Intrinsic Value	$ 310
Payments For Exercise of Stock Appreciation Rights	$ 260
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options, weighted average exercise price (in dollars per share)	$ 1.70	$ 1.70	$ 1.70	1.70
Grants in period, weighted average exercise price (in dollars per share)	3.89	1.76
Exercise price (in USD per share)	1.70	1.70	1.70
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding options, weighted average exercise price (in dollars per share)	8.41	15.61	15.61	$ 15.61
Grants in period, weighted average exercise price (in dollars per share)	8.41	3.06
Exercise price (in USD per share)	$ 7.42	$ 2.92	2.92
Maximum \| Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable options, weighted average remaining contractual term	10 years
Common Stock \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, weighted average exercise price (in dollars per share)			2.92
Share-based Compensation Award, Tranche One \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, weighted average exercise price (in dollars per share)			5
Share-based Compensation Award, Tranche Two \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, weighted average exercise price (in dollars per share)			$ 7
Exercised in period (in shares)	90 days		90 days
Share-based Compensation Award, Tranche Three \| Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, weighted average exercise price (in dollars per share)			$ 10
Exercised in period (in shares)			90 days

SHARE-BASED PAYMENTS - Schedule

SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options, Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning of period (in dollars per share)	$ 2.91	$ 3.43	$ 3.84
Grants in period, weighted average exercise price (in dollars per share)	3.99	1.77	2.92
Exercises in period, weighted average exercise price (in dollars per share)	2.95	1.97	2.27
Forfeitures in period, weighted average exercise price (in dollars per share)	3.16	3.26	3.94
Expirations in period, weighted average exercise price (in dollars per share)	8.14	4.40	6.97
Weighted average exercise price, end of period (in dollars per share)	2.79	$ 2.91	$ 3.43
Exercisable options, weighted average exercise price (in dollars per share)	$ 2.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options (in shares)	942,882	1,609,087	1,487,433	1,732,754
Number of exercisable options (in shares)	729,565
Number of exercises in period (in shares)	(775,814)	(302,707)	(54,805)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(8,048)	(188,541)	(342,866)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period	(51,653)	(98,512)	(144,100)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	169,310	711,414	296,450
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, weighted average remaining contractual life	2 years 6 months
Exercisable options, weighted average remaining contractual term	2 years 2 months 19 days
Options outstanding, intrinsic value	$ 4,565
Exercisable options, intrinsic value	$ 3,504
Minimum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning of period (in dollars per share)	$ 1.70	$ 1.70	$ 1.70
Grants in period, weighted average exercise price (in dollars per share)	3.89	1.76
Exercises in period, weighted average exercise price (in dollars per share)	1.70	1.70	1.70
Forfeitures in period, weighted average exercise price (in dollars per share)	1.76	1.70	1.70
Expirations in period, weighted average exercise price (in dollars per share)	1.70	4.12
Weighted average exercise price, end of period (in dollars per share)	1.70	1.70	1.70
Exercisable options, weighted average exercise price (in dollars per share)	1.70
Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, beginning of period (in dollars per share)	15.61	15.61	15.61
Grants in period, weighted average exercise price (in dollars per share)	8.41	3.06
Exercises in period, weighted average exercise price (in dollars per share)	7.42	2.92	2.92
Forfeitures in period, weighted average exercise price (in dollars per share)	5.91	5.18	7.42
Expirations in period, weighted average exercise price (in dollars per share)	15.61	5.22
Weighted average exercise price, end of period (in dollars per share)	8.41	$ 15.61	$ 15.61
Exercisable options, weighted average exercise price (in dollars per share)	$ 7.14

SHARE-BASED PAYMENTS - Schedu_2

SHARE-BASED PAYMENTS - Schedule of Compensation Costs for Share-based Payment Arrangements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 2,158	$ 2,598	$ 3,771
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	323	555	453
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	1,562	1,272	2,006
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 273	$ 771	$ 1,312

SHARE-BASED PAYMENTS - Schedu_3

SHARE-BASED PAYMENTS - Schedule of Valuation Assumptions (Details) - Compensation Plan - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.44%	1.27%	2.62%
Expected life	5 years	4 years 7 months 6 days	5 years
Expected volatility	61.96%	61.81%	59.38%
Expected dividend yield	0.00%	0.00%	0.00%
Weighted average grant date fair value	$ 2.06	$ 0.82	$ 1.54

SHARE-BASED PAYMENTS - Schedu_4

SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options and Restricted Stock Units Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-option
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Number of nonvested shares, beginning of period (in shares)	403,990	223,381	297,044
Granted, nonvested, number of shares (in shares)	169,310	711,414	296,450
Vested, number of shares (in shares)	(351,934)	(508,630)	(356,626)
Nonvested options forfeited, number of shares (in shares)	(8,049)	(22,175)	(13,487)
Number of nonvested shares, end of period (in shares)	213,317	403,990	223,381
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share)	$ 0.94	$ 1.32	$ 1.06
Granted, nonvested, weighted average grant date fair value (in dollars per share)	2.06	0.82	1.54
Vested, weighted average grant date fair value (in dollars per share)	1.23	0.94	1.27
Nonvested options forfeited, weighted average grant date fair value (in dollars per share)	1.60	0.96	1.59
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 1.34	$ 0.94	$ 1.32
RSU
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Number of nonvested shares, beginning of period (in shares)	1,094,056	1,315,536	1,580,187
Granted, nonvested, number of shares (in shares)	441,241	740,998	731,435
Vested, number of shares (in shares)	(635,233)	(746,477)	(862,378)
Nonvested options forfeited, number of shares (in shares)	0	(216,001)	(133,708)
Number of nonvested shares, end of period (in shares)	900,064	1,094,056	1,315,536
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Nonvested, weighted average grant date fair value, beginning of period (in dollars per share)	$ 1.98	$ 2.45	$ 1.99
Granted, nonvested, weighted average grant date fair value (in dollars per share)	3.89	1.65	2.91
Vested, weighted average grant date fair value (in dollars per share)	1.94	2.45	2
Nonvested options forfeited, weighted average grant date fair value (in dollars per share)	0	2.13	2.40
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 2.94	$ 1.98	$ 2.45

SHARE-BASED PAYMENTS - Schedu_5

SHARE-BASED PAYMENTS - Schedule of Stock Appreciation Rights (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Stock Appreciation Rights (SARs)
Number of Shares
Beginning balance (in shares)	1,720,623	2,165,509	0
Granted (in shares)	0	0	2,195,994
Exercised (in shares)	48,201	0	0
Forfeited (in shares)	0	(444,886)	(30,485)
Expired (in shares)	0	0	0
Ending balance (in shares)	1,672,422	1,720,623	2,165,509	0
Exercisable (in shares)	1,098,873
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 2.92	$ 2.92	$ 0
Granted (in dollars per share)		0	0	$ 2.92
Exercised (in dollars per shares)		2.92	0	0
Forfeited (in dollars per share)		0	2.92	2.92
Expired (in dollars per share)		0	0	0
Ending balance (in dollars per share)	2.92	$ 2.92	$ 2.92	$ 0
Exercisable (in dollars per share)	$ 2.92
Weighted Average Remaining Contractual Life (Years), Outstanding	2 years 21 days
Weighted Average Remaining Contractual Life (Years), Exercisable	2 years 21 days
Intrinsic Value Outstanding	$ 7,877
Intrinsic Value, Exercisable	$ 5,176
Stock Appreciation Rights, Non-vested
Number of Shares
Beginning balance (in shares)	1,720,623	2,165,509	0
Granted (in shares)	0	0	2,195,994
Vested (in dollars per share)	$ 1.27	$ 0	$ 0
Vested (in shares)	(1,147,074)	0	0
Forfeited (in shares)	0	(444,886)	(30,485)
Ending balance (in shares)	573,549	1,720,623	2,165,509	0
Weighted Average Exercise Price
Beginning balance (in dollars per share)	$ 1.25	$ 1.25	$ 0
Granted (in dollars per share)	0	0	1.25
Forfeited (in dollars per share)	0	1.25	1.25
Ending balance (in dollars per share)	$ 1.19	$ 1.25	$ 1.25	$ 0

LEASES Narrative (Details)

LEASES Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
LEASES Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Lessee, Lease, Description [Line Items]
Right-of use asset	$ 408	$ 662
Operating lease liability, current	324	289
Operating lease liability, noncurrent	$ 145	469
Lease, term of contract	17 months
Lease extensions	5 years
Lease expense	$ 308	$ 339	$ 381

LEASES Lease Costs (Details)

LEASES Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
LEASES Lease Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Short-term leases	$ 324	$ 297	$ 297
Sublease income	0	0	(56)
Total lease expense	632	636	622
Cash paid for amounts included in the measurement of operating lease liabilities	$ 343	$ 367	$ 333
Weighted average remaining lease term of operating leases	1 year 4 months 24 days	2 years 4 months 24 days	3 years 3 months 18 days
Weighted average discount rate of operating leases	9.00%	9.00%	9.00%
Lease expense	$ 308	$ 339	$ 381

LEASES Future Minimum Lease Pay

LEASES Future Minimum Lease Payments (Details) $ in Thousands	Dec. 31, 2021USD ($)
Leases [Abstract]
2020	$ 350
2021	147
2022	0
2023	0
2024	0
Thereafter	0
Total lease payments	497
Less: Interest	(28)
Present value of lease liabilities	$ 469

INCOME TAXES - Schedule of Inco

INCOME TAXES - Schedule of Income (Loss) Before Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Investments, Owned, Federal Income Tax Note [Line Items]
Net income (loss) for the period	$ 1,448	$ (27,872)	$ (38,094)
Canada
Investments, Owned, Federal Income Tax Note [Line Items]
Net income (loss) for the period	(7,549)	(10,407)	(4,174)
Foreign
Investments, Owned, Federal Income Tax Note [Line Items]
Net income (loss) for the period	$ 8,997	$ (17,465)	$ (33,920)

INCOME TAXES - Schedule of Effe

INCOME TAXES - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income (Loss) before income taxes	$ 1,448	$ (27,872)	$ (38,094)
Combined federal and provincial rate	26.50%	26.50%	26.50%
Expected income tax recovery	$ 384	$ (7,385)	$ (10,095)
Share-based compensation	(89)	565	985
Other non-deductible/non-taxable items	159	1,985	(376)
Unrecognized deferred tax assets	(454)	4,835	9,486
Income tax expense	$ 0	$ 0	$ 0

INCOME TAXES - Schedule of Defe

INCOME TAXES - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets
Inventories	$ 6,380	$ 7,051
Short-term investments	209	209
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Classification [Abstract]
Operating loss carry forwards	101,345	95,060
Capital loss carry forwards	914	843
Deferred revenue and other	1,520	2,057
Mineral properties and deferred costs, United States	18,682	24,794
Mineral properties and deferred costs, Canada	1,884	1,760
Asset retirement obligations	3,627	3,455
Property, plant and equipment	942	1,806
Total deferred tax assets	135,503	137,035
Less: valuation allowance	(135,503)	(137,035)
Net deferred tax assets	$ 0	$ 0

INCOME TAXES - Valuation Allowa

INCOME TAXES - Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance, Beginning Balance	$ 137,035
Valuation allowance, additions	6,653	$ 7,140
Valuation allowance, deductions	(8,185)	(1,659)
Valuation allowance, Ending Balance	135,503	137,035
Valuation Allowance of Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance, Beginning Balance	137,035	131,554
Valuation allowance, Ending Balance	$ 135,503	$ 137,035

INCOME TAXES - Schedule of Capi

INCOME TAXES - Schedule of Capital Losses and Net Operating Losses (Details) $ in Thousands	Dec. 31, 2021USD ($)
UNITED STATES \| Excess Interest Carryforward \| United States
Operating Loss Carryforwards [Line Items]
Amount	$ 11
Canada \| Non-capital losses \| Canada
Operating Loss Carryforwards [Line Items]
Amount	49,737
Canada \| Capital losses \| Canada
Operating Loss Carryforwards [Line Items]
Amount	3,450
Canada \| Investment tax credits \| Canada
Operating Loss Carryforwards [Line Items]
Amount	1,254
Pre-2018 net operating losses \| UNITED STATES \| United States
Operating Loss Carryforwards [Line Items]
Amount	292,139
Post-2017 net operating losses \| UNITED STATES \| United States
Operating Loss Carryforwards [Line Items]
Amount	$ 40,562

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Details) $ in Millions	12 Months Ended
INCOME TAXES - Narrative (Details) $ in Millions	Dec. 31, 2021USD ($)
Income Tax Disclosure [Abstract]
Operating losses, not utilized	$ 75

SUPPLEMENTAL FINANCIAL INFORM_3

SUPPLEMENTAL FINANCIAL INFORMATION - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue, Major Customer [Line Items]
Revenue	$ 3,184,000	$ 1,658,000	$ 5,865,000
Contract with Customer, Liability	0	0	0
Sales Revenue, Net \| Customer Concentration Risk \| Customer 1
Revenue, Major Customer [Line Items]
Revenue	1,570,000	1,550,000	2,720,000
Sales Revenue, Net \| Customer Concentration Risk \| Customer 2
Revenue, Major Customer [Line Items]
Revenue	1,390,000		770,000
Sales Revenue, Net \| Customer Concentration Risk \| Customer 3
Revenue, Major Customer [Line Items]
Revenue			750,000
Sales Revenue, Net \| Customer Concentration Risk \| Customer 4
Revenue, Major Customer [Line Items]
Revenue			740,000
Sales Revenue, Net \| United States \| Geographic Concentration Risk
Revenue, Major Customer [Line Items]
Revenue	1,720,000	1,660,000	5,800,000
Sales Revenue, Net \| Other \| Geographic Concentration Risk
Revenue, Major Customer [Line Items]
Revenue	80,000		$ 70,000
Sales Revenue, Net \| ESTONIA \| Geographic Concentration Risk
Revenue, Major Customer [Line Items]
Revenue	1,390,000
Accounts Receivable Benchmark \| Customer Concentration Risk \| Customer 1
Revenue, Major Customer [Line Items]
Accounts Receivable, after Allowance for Credit Loss	1,390,000	350,000
Accounts Receivable Benchmark \| Customer Concentration Risk \| Customer 2
Revenue, Major Customer [Line Items]
Accounts Receivable, after Allowance for Credit Loss	370,000
Accounts Receivable Benchmark \| United States \| Geographic Concentration Risk
Revenue, Major Customer [Line Items]
Accounts Receivable, after Allowance for Credit Loss	470,000	$ 390,000
Accounts Receivable Benchmark \| ESTONIA \| Geographic Concentration Risk
Revenue, Major Customer [Line Items]
Accounts Receivable, after Allowance for Credit Loss	$ 1,390,000

SUPPLEMENTAL FINANCIAL INFORM_4

SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Other Nonoperating Income (Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest income	$ 44	$ 153	$ 482
Change in value of investments accounted for at fair value	7,106	1,835	(153)
Change in value of warrant liabilities	(8,078)	(5,436)	3,726
Change in value of Convertible Debentures	0	155	291
Foreign exchange gain (loss)	(128)	767	(46)
Other	350	233	(322)
Other income (loss)	1,194	(2,293)	3,978
Department Of Energy Award	$ 1,900	$ 0	$ 0

SUPPLEMENTAL FINANCIAL INFORM_5

SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 3,038	$ 1,108
Payroll liabilities	1,988	1,512
Other accrued liabilities	738	701
Accounts payable and accrued liabilities	$ 5,764	$ 3,321

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Asset retirement obligation	$ 13,687	$ 13,038	$ 18,972
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	350
Mining Properties and Mineral Rights
Other Commitments [Line Items]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	1,750
Canyon Project
Other Commitments [Line Items]
Loss contingency, estimate of possible loss	20,310	20,820
Asset retirement obligation	$ 41,340	$ 41,950

FAIR VALUE ACCOUNTING - Fair Va

FAIR VALUE ACCOUNTING - Fair Value Measurements, Recurring and Nonrecurring (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value (Note 7)	$ 38,538	$ 779
Time Deposits	494	2,247
Warrant liabilities (Note 12)		(8,573)
Fair Value, Net Asset (Liability)	39,032	(5,547)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value (Note 7)	37,407	779
Time Deposits	494	2,247
Warrant liabilities (Note 12)		(8,573)
Fair Value, Net Asset (Liability)	37,901	(5,547)
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value (Note 7)	1,131	0
Time Deposits	0	0
Warrant liabilities (Note 12)		0
Fair Value, Net Asset (Liability)	1,131	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value (Note 7)	0	0
Time Deposits	0	0
Warrant liabilities (Note 12)		0
Fair Value, Net Asset (Liability)	$ 0	$ 0

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($)	Jun. 01, 2021	Jun. 01, 2020	Jun. 30, 2016	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2018
Related Party Transaction [Line Items]
Lessor, Operating Lease, Annual Lease Expense	$ 15,000	$ 12,000
Lessor, Operating Lease, Monthly Lease Payment	$ 1,250	$ 1,000
Royalty percentage of minerals recovered sold under minimum price threshold			3.125%
Mineral price per pound, low range							$ 65
Royalty percentage of minerals recovered sold between price thresholds			6.25%
Mineral price per pound, upper range							$ 95
Royalty percentage of minerals recovered sold above maximum price threshold			7.50%
Surface Use Payments				$ 300,000	$ 300,000
Accounts Receivable, Related Parties				$ 100,000
Director
Related Party Transaction [Line Items]
Equity method, ownership percentage				81.00%
Proceeds from contributed capital				$ 310,000	$ 130,000	$ 50,000
Director \| United Nuclear
Related Party Transaction [Line Items]
Equity method, ownership percentage				19.00%

REVENUE RECOGNITION AND CONTR_2

REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS (Details) $ in Thousands	Dec. 31, 2020USD ($)
Accounting Standards Update 2014-09 [Member]
Revenue from External Customer [Line Items]
Revenue, Remaining Performance Obligation, Amount	$ 2,740

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($) $ / shares in Units, $ in Thousands	Jan. 25, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Exercise price (in USD per share)		$ 2.95	$ 1.97	$ 2.27
Shares issued (in shares)		156,262,199	134,311,033	100,735,889	91,445,066
Subsequent Event
Subsequent Event [Line Items]
Stock options granted in period (in shares)	100,000
Employee Stock Option
Subsequent Event [Line Items]
Award vesting period		2 years
Employee Stock Option \| Subsequent Event
Subsequent Event [Line Items]
Exercise price (in USD per share)	$ 6.47
Award vesting period	5 years
Employee Stock Option \| Share-based Compensation Award, Tranche Two \| Subsequent Event
Subsequent Event [Line Items]
Award vesting rights, percentage	50.00%
Employee Stock Option \| Share-based Compensation Award, Tranche Three \| Subsequent Event
Subsequent Event [Line Items]
Award vesting rights, percentage	50.00%
Restricted Stock Units (RSUs)
Subsequent Event [Line Items]
Shares granted in share-based compensation awards (in shares)		440,000	740,000	730,000
Award vesting period		3 years
Restricted Stock Units (RSUs) \| Subsequent Event
Subsequent Event [Line Items]
Shares granted in share-based compensation awards (in shares)	330,000
Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Four \| Subsequent Event
Subsequent Event [Line Items]
Award vesting rights, percentage	50.00%
Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Five \| Subsequent Event
Subsequent Event [Line Items]
Award vesting rights, percentage	25.00%
Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Six \| Subsequent Event
Subsequent Event [Line Items]
Award vesting rights, percentage	25.00%
Stock Appreciation Rights (SARs)
Subsequent Event [Line Items]
Stock options granted in period (in shares)		0	0	2,200,000
Award vesting period				5 years
Stock appreciation rights, grants (in shares)		0	0	2,195,994
Stock Appreciation Rights (SARs) \| Subsequent Event
Subsequent Event [Line Items]
Award vesting period	5 years
Stock appreciation rights, grants (in shares)	830,000
Stock Appreciation Rights (SARs) \| Share-based Compensation Award, Tranche One \| Subsequent Event
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Volume Weighted Average Price Per Share	$ 12
Stock Appreciation Rights (SARs) \| Share-based Compensation Award, Tranche Two
Subsequent Event [Line Items]
Exercised in period (in shares)		90 days		90 days
Stock Appreciation Rights (SARs) \| Share-based Compensation Award, Tranche Two \| Subsequent Event
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Volume Weighted Average Price Per Share	$ 14
Exercised in period (in shares)	90 days
Stock Appreciation Rights (SARs) \| Share-based Compensation Award, Tranche Three
Subsequent Event [Line Items]
Exercised in period (in shares)				90 days
Stock Appreciation Rights (SARs) \| Share-based Compensation Award, Tranche Three \| Subsequent Event
Subsequent Event [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Volume Weighted Average Price Per Share	$ 16
Stock Appreciation Rights and Restricted Stock Units \| Subsequent Event
Subsequent Event [Line Items]
Share-based Compensation Arrangements by Share-based Payment Award, Equity Instruments Other than Options And Non Equity Instruments, Exercises in Period, Weighted Average Exercise Price	$ 6.47
At The Market Sale Of Stock
Subsequent Event [Line Items]
Sale of stock consideration received		$ 106,210	$ 37,250	$ 19,680