Energy Fuels (UUUU) 10-Q4 Aug 232023 Q2 Quarterly reportFinancial data

Company Profile

Cover

Cover - shares	6 Months Ended
Cover - shares	Jun. 30, 2023	Aug. 01, 2023
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	001-36204
Entity Registrant Name	ENERGY FUELS INC.
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, City or Town	Lakewood,
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80228
City Area Code	303
Local Phone Number	974-2140
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		158,248,796
Amendment Flag	false
Entity Central Index Key	0001385849
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
NEW YORK STOCK EXCHANGE, INC. [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Shares, no par value
Trading Symbol	UUUU
Security Exchange Name	NYSEAMER
TORONTO STOCK EXCHANGE [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common shares, no par value

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Uranium concentrates	$ 4,335	$ 0	$ 22,805
Vanadium concentrates	0	5,295	871	$ 7,707
RE Carbonate	2,271	449	2,271	449
Alternate Feed Materials, processing and other	257	723	529	1,248
Total revenues	6,863	6,467	26,476	9,404
Costs applicable to uranium concentrates	2,337	0	10,052	0
Costs applicable to vanadium concentrates	0	2,102	551	3,331
Costs applicable to RE Carbonate	2,030	222	2,030	222
Underutilized capacity production costs applicable to RE Carbonate	0	(1,095)	0	(2,758)
Total costs applicable to revenues	4,367	3,419	12,633	6,311
Other operating costs and expenses
Exploration, development and processing	3,820	1,219	6,916	2,392
Standby	1,607	3,323	3,894	6,798
Accretion of asset retirement obligations	274	510	620	904
Selling, general and administration	7,458	4,703	13,481	9,919
Total operating loss	(10,663)	(6,707)	(11,068)	(16,920)
Gain on sale of assets	2,807		119,257	0
Other income (loss) (Note 11)	2,971	(11,352)	1,190	(15,869)
Other income (loss)	5,778	(11,352)	120,447	(15,869)
Net income (loss)	$ (4,885)	$ (18,059)	$ 109,379	$ (32,789)
Basic loss per share (in dollars per share)	$ (0.03)	$ (0.11)	$ 0.69	$ (0.21)
Diluted loss per share (in dollars per share)	$ (0.03)	$ (0.11)	$ 0.69	$ (0.21)
Items that may be reclassified in the future to income (loss)
Foreign currency translation adjustment	$ 0	$ (3,488)	$ 0	$ (1,722)
Other comprehensive loss	0	(3,488)	0	(1,722)
Comprehensive income (loss)	(4,885)	(21,547)	109,379	(34,511)
Net income (loss) attributable to:
Owners of the Company	(4,861)	(18,054)	109,404	(32,783)
Non-controlling interests	(24)	(5)	(25)	(6)
Net income (loss)	(4,885)	(18,059)	109,379	(32,789)
Comprehensive income (loss) attributable to:
Owners of the Company	(4,861)	(21,542)	109,404	(34,505)
Non-controlling interests	(24)	(5)	(25)	(6)
Comprehensive income (loss)	$ (4,885)	$ (21,547)	$ 109,379	$ (34,511)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 35,592	$ 62,820
Marketable securities (Notes 3 and 13)	64,120	12,192
Trade and other receivables, net of allowance for credit losses of $223 and $223, as of June 30, 2023 and December 31, 2022, respectively	2,930	519
Inventories (Note 4)	32,978	38,155
Prepaid expenses and other current assets	4,312	9,529
Property, plant and equipment and other assets held for sale, net (Note 5)	0	12,375
Total current assets	139,932	135,590
Other long-term receivables	1,532	1,537
Inventories (Note 4)	2,127	2,465
Operating lease right of use asset	1,304	1,376
Investments accounted for at fair value (Note 13)	17,373	19,329
Property, plant and equipment, net (Note 5)	17,427	12,662
Mineral properties (Note 5)	115,715	83,539
Convertible note (Notes 3 and 13)	59,206	0
Restricted cash (Note 6)	17,459	17,449
Total assets	372,075	273,947
Current liabilities
Accounts payable and accrued liabilities (Note 11)	5,449	6,929
Operating lease liability	120	59
Deposits for assets held for sale	0	6,000
Asset retirement obligation and other liabilities held for sale (Note 6)	0	5,636
Total current liabilities	5,569	18,624
Operating lease liability	1,224	1,319
Asset retirement obligations (Note 6)	10,136	9,595
Total liabilities	16,929	29,538
Equity
Share capital Common shares, without par value, unlimited shares authorized; shares issued and outstanding 158,238,796 and 157,682,531 as of June 30, 2023 and December 31, 2022, respectively	699,851	698,493
Accumulated deficit	(346,716)	(456,120)
Accumulated other comprehensive loss	(1,946)	(1,946)
Total shareholders' equity	351,189	240,427
Non-controlling interests	3,957	3,982
Total equity	355,146	244,409
Total liabilities and equity	372,075	273,947
Commitments and contingencies (Note 12)

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 223	$ 223
Common stock, shares, issued (in shares)	158,238,796	157,682,531
Common stock, shares, outstanding (in shares)	158,238,796	157,682,531

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Total	Common Stock	Deficit	Accumulated Other Comprehensive Income (Loss)	Total Shareholders' Equity	Non-Controlling Interests
Beginning balance ( in shares) at Dec. 31, 2021		156,262,199
Beginning balance at Dec. 31, 2021	$ 295,526	$ 685,903	$ (396,271)	$ 1,943	$ 291,575	$ 3,951
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(14,730)		(14,729)		(14,729)	(1)
Other comprehensive loss	1,766			1,766	1,766
Shares Issued For Cash By At The Market Offering Shares		413,751
Shares issued for cash by at-the-market offering	4,260	$ 4,260			4,260
Share issuance cost	96	96			96
Share-based compensation	862	$ 862			862
shares issued for exrcise of stock options (in shares)		135,926
Shares issued for exercise of stock options	(328)	$ (328)			(328)
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	884	$ 884			884
Shares issued for consulting services (in shares)		6,022
Shares issued for consulting services	$ 51	$ 51			51
Shares issued for exercise of stock appreciation rights (in shares)	362,350
Ending balance (in shares) at Mar. 31, 2022		157,180,248
Ending balance at Mar. 31, 2022	$ 287,083	$ 690,424	(411,000)	3,709	283,133	3,950
Beginning balance ( in shares) at Dec. 31, 2021		156,262,199
Beginning balance at Dec. 31, 2021	295,526	$ 685,903	(396,271)	1,943	291,575	3,951
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(32,789)
Other comprehensive loss	(1,722)
Ending balance (in shares) at Jun. 30, 2022		157,569,420
Ending balance at Jun. 30, 2022	270,516	$ 695,404	(429,054)	221	266,571	3,945
Beginning balance ( in shares) at Mar. 31, 2022		157,180,248
Beginning balance at Mar. 31, 2022	287,083	$ 690,424	(411,000)	3,709	283,133	3,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(18,059)		(18,054)		(18,054)	(5)
Other comprehensive loss	(3,488)			(3,488)	(3,488)
Shares Issued For Cash By At The Market Offering Shares		356,028
Shares issued for cash by at-the-market offering	3,808	$ 3,808			3,808
Share issuance cost	86	86			86
Share-based compensation	1,147	$ 1,147			1,147
shares issued for exrcise of stock options (in shares)		24,326
Shares issued for exercise of stock options	(67)	$ (67)			(67)
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	11	$ 11			11
Shares issued for consulting services (in shares)		5,183
Shares issued for consulting services	55	$ 55			55
Shares issued for exercise of stock appreciation rights (in shares)		3,635
Ending balance (in shares) at Jun. 30, 2022		157,569,420
Ending balance at Jun. 30, 2022	270,516	$ 695,404	(429,054)	221	266,571	3,945
Beginning balance ( in shares) at Dec. 31, 2022		157,682,531
Beginning balance at Dec. 31, 2022	244,409	$ 698,493	(456,120)	(1,946)	240,427	3,982
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	114,264		114,265		114,265	(1)
Share-based compensation	1,186	$ 1,186			1,186
shares issued for exrcise of stock options (in shares)		34,219
Shares issued for exercise of stock options	(72)	$ (72)			(72)
Shares issued for the vesting of restricted stock units (in shares)		312,662
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	918	$ 918			918
Ending balance (in shares) at Mar. 31, 2023		158,029,412
Ending balance at Mar. 31, 2023	359,013	$ 698,833	(341,855)	(1,946)	355,032	3,981
Beginning balance ( in shares) at Dec. 31, 2022		157,682,531
Beginning balance at Dec. 31, 2022	244,409	$ 698,493	(456,120)	(1,946)	240,427	3,982
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	109,379
Other comprehensive loss	0
Ending balance (in shares) at Jun. 30, 2023		158,238,796
Ending balance at Jun. 30, 2023	355,146	$ 699,851	(346,716)	(1,946)	351,189	3,957
Beginning balance ( in shares) at Mar. 31, 2023		158,029,412
Beginning balance at Mar. 31, 2023	359,013	$ 698,833	(341,855)	(1,946)	355,032	3,981
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,885)		(4,861)		(4,861)	(24)
Other comprehensive loss	0
Share-based compensation	1,554	$ 1,554			1,554
shares issued for exrcise of stock options (in shares)		45,126
Shares issued for exercise of stock options	(312)	$ (312)			(312)
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	848	$ 848			848
Shares issued for exercise of stock appreciation rights (in shares)		164,258
Ending balance (in shares) at Jun. 30, 2023		158,238,796
Ending balance at Jun. 30, 2023	$ 355,146	$ 699,851	$ (346,716)	$ (1,946)	$ 351,189	$ 3,957

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Net income (loss) for the period	$ (4,885)	$ 114,264	$ (18,059)	$ (14,730)	$ 109,379	$ (32,789)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depletion, depreciation and amortization	660		870		1,319	1,679
Share-based compensation					2,740	2,009
Accretion of asset retirement obligations	274		510		620	904	$ 1,556
Revision and settlement of asset retirement obligation					0	(445)	(238)
Unrealized foreign exchange (gain) loss					(325)	(1,340)
Unrealized loss on investments accounted for at fair value					2,189	16,837
Gain on sale of assets	(2,807)				(119,257)	0
Other, net					76	87
Changes in current assets and liabilities:
Marketable securities					(335)	172
Inventories					5,515	1,784
Trade and other receivables					(2,373)	(675)
Prepaid expenses and other current assets					(1,348)	(6,594)
Accounts payable and accrued liabilities					(2,269)	(2,987)
Net cash used in operating activities					(4,069)	(21,358)
INVESTING ACTIVITIES
Additions to property, plant and equipment					(5,467)	(705)
Additions to mineral properties					(3,055)	0
Acquisition of mineral properties					(22,374)	0
Purchases of marketable securities					(67,775)	(11,435)
Maturities of marketable securities					16,405	0
Proceeds from sale of assets					56,859	0
Net cash used in investing activities					(25,407)	(12,140)
FINANCING ACTIVITIES
Issuance of common shares for cash, net of issuance costs					0	7,886
Cash received from exercise of stock options					384	395
Net cash provided by (used in) financing activities					(1,382)	7,386
Effect of exchange rate fluctuations on cash held in foreign currencies					50	(21)
Plus: release of restricted cash related to sale of assets					3,590	0
Net change in cash, cash equivalents and restricted cash					(27,218)	(26,133)
Cash, cash equivalents and restricted cash, beginning of period		$ 80,269		$ 132,822	80,269	132,822	132,822
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	$ 53,051		$ 106,689		53,051	106,689	$ 80,269
Non-cash investing and financing transactions:
Issuance of common shares for consulting services					0	106
Acquisition of convertible note					59,259	0
Supplemental disclosure of cash flow information:
Cash paid during the period for interest					13	17
Increase (decrease) in accounts payable and accrued liabilities for property, plant and equipment and mineral properties					734	(182)
Stock Appreciation Rights (SARs)
FINANCING ACTIVITIES
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units					(848)	(11)
Restricted Stock Units (RSUs)
FINANCING ACTIVITIES
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units					$ (918)	$ (884)

THE COMPANY AND DESCRIPTION OF

THE COMPANY AND DESCRIPTION OF BUSINESS	6 Months Ended
THE COMPANY AND DESCRIPTION OF BUSINESS	Jun. 30, 2023
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). Energy Fuels Inc. and its subsidiary companies (collectively “ the Company ” or “ Energy Fuels ”) are together engaged in conventional and in situ recovery (“ ISR ”) uranium extraction, recovery and sales of uranium from mineral properties and the recycling of uranium-bearing materials generated by third parties, along with the exploration, permitting and evaluation of uranium properties in the United States (the “ U.S. ”). As a part of these activities, the Company also acquires, explores, evaluates and, if warranted, permits uranium properties. The Company’s final uranium product, uranium oxide concentrate (“ U 3 O 8 ” or “ uranium concentrate ”), known more commonly as “yellowcake,” is sold to customers for further processing into fuel for nuclear reactors. The Company also produces vanadium pentoxide (“ V 2 O 5 ”), along with uranium at the White Mesa Mill (the “ White Mesa Mill ” or the “ 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 ramping up to commercial production of rare earth element (“ REE ”) carbonate (“ RE Carbonate ”) from various uranium- and REE-bearing materials acquired from third parties and is working on modifications and enhancements at the Mill for the potential production of separated REE oxides. Additionally, the Company is evaluating the potential to recover radioisotopes from its existing process streams at the Mill for use in targeted alpha therapy (“ TAT ”) therapeutics for the treatment of cancer. With its uranium, vanadium, REE and potentially radioisotope production, the Mill is working to establish itself as a critical minerals hub in the U.S. Uranium is the fuel for carbon-free, emission-free baseload nuclear power – one of the cleanest forms of energy in the world. The REEs produced are used to manufacture permanent magnets for electric vehicles, wind turbines and other clean energy and modern technologies. The Company’s uranium and REE production and recycling helps Energy Fuels play a part in addressing global climate change and reducing air pollution. Additionally, the radioisotopes, which the Company is evaluating for recovery from its uranium processing streams, have the potential to provide the isotopes needed for emerging TAT cancer-fighting therapeutics. The Company is a “development stage issuer” as defined by S-K 1300, as it is engaged in the preparation of Mineral Reserves for extraction of at least one material property. Mining Activities Mining activities consist of the Mill, multiple conventional mining projects and an ISR mining project (complete with an ISR recovery facility on standby). The conventional mining projects are located on the Colorado Plateau, including the Pinyon Plain, Whirlwind, La Sal, Bullfrog, Arizona Strip and Roca Honda Projects, all of which are in the vicinity of the Mill, as well as the Sheep Mountain Project located in Wyoming. The ISR project is the Nichols Ranch Project (which includes Jane Dough and Hank Satellite deposits) located in Wyoming. As of June 30, 2023, the Company is performing rehabilitation and development work on its La Sal, Whirlwind and Pinyon Plain projects. Other 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 continues to receive third-party uranium-bearing mineralized materials from mining and recycling activities, such as the Mill's alternate feed program, for processing, continues to expand its REE initiatives, and continues to develop its cancer therapeutics initiatives.

BASIS OF PRESENTATION

BASIS OF PRESENTATION	6 Months Ended
BASIS OF PRESENTATION	Jun. 30, 2023
Accounting Policies [Abstract]
Basis of Presentation	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation These unaudited condensed consolidated financial statements included herein have been prepared by the Company pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“ SEC ”) applicable to interim financial information and should be read in conjunction with the consolidated financial statements and notes thereto and the summary of significant accounting policies included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2022, which was filed with the SEC on March 8, 2023, as amended on March 30 and June 1, 2023. These unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“ U.S. GAAP ”) for interim financial information, and, accordingly, do not include all of the information and footnotes required by U.S. GAAP for complete consolidated financial statements. These unaudited condensed consolidated financial statements are presented in thousands of U.S. dollars, except for share and per share amounts. Certain information and note disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations, although the Company believes that the disclosures included are adequate to make the information presented not misleading. In management’s opinion, these unaudited condensed consolidated financial statements reflect all adjustments, consisting solely of normal recurring items, which are necessary for the fair presentation of the Company’s financial position, results of operations and cash flows on a basis consistent with that of the Company’s audited consolidated financial statements for the year ended December 31, 2022. However, the results of operations for the interim periods may not be indicative of results to be expected for the full fiscal year. Principles of Consolidation These unaudited condensed consolidated financial statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated. Certain prior period amounts have been reclassified in order to conform to the current period presentation. These reclassifications had no effect on the reported results of operations.

MARKETABLE SECURITIES

MARKETABLE SECURITIES	6 Months Ended
MARKETABLE SECURITIES	Jun. 30, 2023
Cash and Cash Equivalents [Abstract]
Marketable Securities	MARKETABLE SECURITIES The Company elected the fair value option for its marketable debt securities and convertible note for which changes in fair value and interest income are recorded in Other income (loss) in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). The fair value option was elected for these marketable debt securities, as the Company may sell them prior to their stated maturities after consideration of the Company’s risk versus reward objectives, as well as its liquidity requirements. The stated contractual maturity dates of marketable debt securities held as of June 30, 2023 and December 31, 2022 are due in one to two years. The convertible note was received as partial consideration for the Alta Mesa Transaction (defined in Note 5 – Property, Plant and Equipment and Mineral Properties). The Company elected the fair value option for the secured convertible note, as it has the option of converting the principal due into fully paid and non-assessable common shares of enCore Energy Corp. (“ enCore ”). Marketable equity securities are measured at fair value as of each reporting date, and realized and unrealized gains (losses) and interest income are recorded in Other income (loss) in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). The following table summarizes our marketable securities by significant investment categories as of June 30, 2023: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable debt securities (1) $ 63,019 $ — $ 212 $ 63,231 Convertible note (2) 59,457 (251) — 59,206 Marketable equity securities 2,876 (1,987) — 889 Total marketable securities $ 125,352 $ (2,238) $ 212 $ 123,326 (1) Marketable debt securities are comprised primarily of U.S. government agency bonds. (2) The Convertible note was received as partial consideration in the Alta Mesa Transaction (defined in Note 5 – Property, Plant and Equipment and Mineral Properties) and is valued using a binomial lattice model using Level 3 inputs. See Note 5 – Property, Plant and Equipment and Mineral Properties and Note 13 – Fair Value Accounting for more information. The following table summarizes our marketable securities by significant investment categories as of December 31, 2022: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable debt securities (1) $ 11,435 $ (310) $ — $ 11,125 Marketable equity securities 2,876 (1,809) — 1,067 Total marketable securities $ 14,311 $ (2,119) $ — $ 12,192 (1) Marketable debt securities are comprised primarily of U.S. government agency bonds.

INVENTORIES

INVENTORIES	6 Months Ended
INVENTORIES	Jun. 30, 2023
Inventory Disclosure [Abstract]
Inventories	INVENTORIES Inventories consisted of the following items: June 30, 2023 December 31, 2022 Concentrates and work-in-progress $ 32,978 $ 35,476 Inventory of ore in stockpiles 256 940 Consumables 1,871 4,204 Total inventories $ 35,105 $ 40,620

PLANT AND EQUIPMENT AND MINERAL

PLANT AND EQUIPMENT AND MINERAL PROPERTIES	6 Months Ended
PLANT AND EQUIPMENT AND MINERAL PROPERTIES	Jun. 30, 2023
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, net: June 30, 2023 December 31, 2022 Cost Accumulated Net Book Value Cost Accumulated Net Book Property, plant and equipment Nichols Ranch $ 29,210 $ (21,238) $ 7,972 $ 29,210 $ (20,221) $ 8,989 Pinyon Plain 2,437 (784) 1,653 1,617 (714) 903 Equipment and other 20,273 (12,471) 7,802 15,009 (12,239) 2,770 Property, plant and equipment total $ 51,920 $ (34,493) $ 17,427 $ 45,836 $ (33,174) $ 12,662 As of December 31, 2022, the net book value of the property, plant and equipment attributable to Alta Mesa was $8.21 million, which was included in Property, plant and equipment and other assets held for sale, net on the Condensed Consolidated Balance Sheets. The Company recognized depreciation expense of $0.66 million and $0.87 million for the three months ended June 30, 2023 and 2022, respectively, and $1.32 million and $1.68 million for the six months ended June 30, 2023, and 2022, respectively. Depreciation expense is included in Exploration, development and process and Standby in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). For the three months ended June 30, 2023 and 2022, the Company capitalized $0.08 million and $0.05 million, respectively, of depreciation expense related to the Mill and Pinyon Plain that was included in the capitalized costs to inventory and mineral properties on the Condensed Consolidated Balance Sheet. For the six months ended June 30, 2023 and 2022, the Company capitalized $0.16 million and $0.05 million, respectively, of depreciation expense related to the Mill and mineral properties that was included in the capitalized costs to inventory and mineral properties on the Condensed Consolidated Balance Sheet. The following is a summary of mineral properties: June 30, 2023 December 31, 2022 Mineral properties Sheep Mountain $ 34,183 $ 34,183 Bahia Project 29,130 — Uranerz ISR properties 25,974 25,974 Roca Honda 22,095 22,095 Pinyon Plain 3,046 — Other 1,287 1,287 Mineral properties total $ 115,715 $ 83,539 Bahia Project On February 10, 2023, the Company closed on two purchase agreements to acquire a total of 17 mineral concessions in the State of Bahia, Brazil totaling approximately 37,300 acres or 58.3 square miles (the “ Bahia Project ”). Under the terms of the purchase agreements, the Company entered into mineral rights transfer agreements with the sellers to acquire the 17 mineral sand concessions. The total purchase price under the purchase agreements was $27.50 million, which consisted of deposit payments of $5.90 million due upon reaching certain stipulated milestones and the remaining $21.60 million due at closing. Upon final payment on February 10, 2023, the transfer and assignment of the mineral rights was completed (the “ Bahia Closing ”). Additionally, the Company incurred direct deal costs related to such asset acquisition of $1.63 million. The purchase deposit payments and direct transaction costs were capitalized as Prepaid expenses and other current assets in the Consolidated Balance Sheets as of December 31, 2022 and reclassified to Mineral properties upon closing within the Condensed Consolidated Balance Sheets. The Bahia Closing followed the Brazilian Government ’ s approval of the transfers to Energy Fuels ’ wholly owned Brazilian subsidiary Energy Fuels Brazil Ltda. Alta Mesa Transaction On February 14, 2023, the Company closed on its sale to enCore of three wholly-owned subsidiaries that together held Energy Fuels' Alta Mesa ISR Project for total consideration of $120 million (the “ Alta Mesa Transaction ”), paid as follows: a. $60 million cash, which included $6 million prior to closing and $54 million at closing; and b. $60 million in the Convertible Note, payable in two years from the closing, bearing annual interest of eight percent (8%). The Convertible Note is convertible at Energy Fuels’ election into enCore common shares at a conversion price of $2.9103 per share, being a 20% premium to the 10-day volume-weighted average price of enCore shares ending the day before the Closing (the “ Conversion Option ”). enCore is currently traded on the TSX-V and NYSE American. The Convertible Note is guaranteed by enCore and fully secured by Alta Mesa. Unless a block trade or similar distribution is executed by Energy Fuels to sell the enCore common shares received on conversion of the Convertible Note, Energy Fuels will be limited to selling a maximum of $10 million of common shares per thirty (30)-day period. The Company recognized a gain on sale of assets from the Alta Mesa Transaction of $116.50 million, which is calculated as the total fair value of the consideration received of $119.46 million consisting of $60 million in cash and the Convertible Note with a fair value of $59.46 million, less the net book value attributable to the Alta Mesa ISR project assets and liabilities after working capital adjustments of $3.40 million, net of transaction costs. Receipt of the Convertible Note represents a non-cash investing activity at its initial fair value. See Note 13 – Fair Value Accounting for more information on the fair value of the Convertible Note. In addition, after the closing of the transaction, enCore was required to replace the $3.59 million of reclamation bonds that existed for the Alta Mesa project, which the Company received during the six months ended June 30, 2023. The Company reclassified $3.59 million cash as a release of collateral from those bonds from Property, plant and equipment and other assets held for sale, net to cash and cash equivalents on its Condensed Consolidated Balance Sheets. In connection with the Alta Mesa Transaction, on May 3, 2023, the Company completed the sale of its Prompt Fission Neutron assets, including the underlying contracts, technology, licenses and intellectual property (collectively, the “ PFN Assets ”), to enCore in exchange for cash consideration received at closing of $3.10 million, which resulted in a gain of $2.75 million. At closing, the PFN Assets, which the Company had purchased in 2020 for cash consideration of $0.5 million, had a net book value of $0.35 million. The PFN Assets were used exclusively at the Alta Mesa ISR Project. Should the Company have the need for the use of a PFN tool in the future, the Company retained a 20-year usage right as a condition of this sale during which, subject to the availability of the PFN Assets, the Company has the right to purchase, lease and/or license at least one fully functional PFN tool and all related and/or required equipment, technology and licenses, as reasonably requested, on commercially reasonable terms and conditions no less favorable than those offered by enCore to third parties. As of June 30, 2023, the Company has not purchased, leased and/or licensed a PFN tool.

ASSET RETIREMENT OBLIGATIONS AN

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH	6 Months Ended
ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH	Jun. 30, 2023
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations and Restricted Cash	ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH Asset Retirement Obligations The following table summarizes the Company’s asset retirement obligations: June 30, 2023 December 31, 2022 Asset retirement obligations, beginning of period $ 9,595 $ 13,687 Revision of estimate — (238) Accretion of liabilities 620 1,556 Held for sale (1) — (5,410) Disposal of Alta Mesa asset retirement obligations (1) (79) — Asset retirement obligations, end of period $ 10,136 $ 9,595 (1) Asset retirement obligations held for sale as of December 31, 2022 are related to Alta Mesa and are included as asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. Disposal of Alta Mesa asset retirement obligations are related to the accretion expense on Alta Mesa through the closing date and is included within Gain on sale of assets on the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). See Note 5 – Property, Plant and Equipment and Mineral Properties for more information. The Company’s asset retirement obligations are subject to legal and regulatory requirements. Estimates of the costs of reclamation are reviewed periodically by the Company and the applicable regulatory authorities. Restricted Cash The Company has cash, cash equivalents and fixed income securities as collateral for various bonds posted in favor of the applicable state regulatory agencies in Arizona, Colorado, New Mexico, Texas, Utah and Wyoming, and the U.S. Bureau of Land Management and U.S. Forest Service for estimated reclamation costs associated with the White Mesa Mill, Nichols Ranch, Alta Mesa and other mining properties. The restricted cash will be released when the Company has reclaimed a mineral property, sold a mineral property to a party having assumed the applicable bond requirements, or restructured the surety and collateral arrangements. See Note 12 – Commitments and Contingencies for more information. The following table summarizes the Company’s restricted cash: June 30, 2023 December 31, 2022 Restricted cash, beginning of period $ 17,449 $ 20,305 Additional collateral posted, net 10 734 Held for sale (1) — (3,590) Restricted cash, end of period $ 17,459 $ 17,449 (1) Restricted cash held for sale is related to Alta Mesa and is included as Asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. See Note 5 – Property, Plant and Equipment and Mineral Properties for more information.

CAPITAL STOCK

CAPITAL STOCK	6 Months Ended
CAPITAL STOCK	Jun. 30, 2023
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 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. The Series A Preferred Shares issuable are non-redeemable, non-callable, non-voting and have no right to dividends. Issued Capital Stock During the three and six months ended June 30, 2022, the Company issued 0.36 million and 0.77 million Common Shares, respectively, under its At-the-Market (the “ ATM ”) program offering for net proceeds of $3.72 million and $7.89 million, respectively, after share issuance costs. No Common Shares were issued under the ATM program during the three and six months ended June 30, 2023.

BASIC AND DILUTED INCOME (LOSS)

BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE	6 Months Ended
BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE	Jun. 30, 2023
Earnings Per Share [Abstract]
Basic and Diluted Loss Per Common Share	BASIC AND DILUTED NET INCOME (LOSS) PER COMMON SHARE Basic and diluted income (loss) per Common Share The calculation of basic and diluted loss per share after adjustment for the effects of all potential dilutive Common Shares, is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 Net income (loss) attributable to owners of the Company $ (4,861) $ (18,054) $ 109,404 $ (32,783) Basic weighted average common shares outstanding 158,137,420 157,491,807 158,034,370 157,044,331 Dilutive impact of stock options and restricted stock units — — 1,156,936 — Diluted weighted average common shares outstanding 158,137,420 157,491,807 159,191,306 157,044,331 Basic net income (loss) per common share $ (0.03) $ (0.11) $ 0.69 $ (0.21) Diluted net income (loss) per common share $ (0.03) $ (0.11) $ 0.69 $ (0.21) For the three months ended June 30, 2023 and 2022, a weighted average of 1.50 million and 1.55 million, respectively, stock options and restricted stock units (“ RSUs ”) have been excluded from the calculation of diluted net loss per common share, as their effect would have been anti-dilutive. For the six months ended June 30, 2023 and 2022, with a weighted average of 0.31 million and 1.52 million, respectively, stock options and RSUs have been excluded from the calculation of diluted net income (loss) per common share, as their effect would have been anti-dilutive. In addition, the Company excluded stock appreciation rights (“ SARs ”) of 2.30 million and 2.45 million, respectively, for the three months ended June 30, 2023 and 2022, as well as 2.31 million and 2.31 million, respectively, for the six months ended June 30, 2023 and 2022, as they are contingently issuable based on specified market prices of the Company’s Common Shares, which were not achieved as of the end of each period.

SHARE-BASED PAYMENTS

SHARE-BASED PAYMENTS	6 Months Ended
SHARE-BASED PAYMENTS	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Share-Based Payments	SHARE-BASED PAYMENTS The Company maintains an equity incentive plan, known as the 2021 Amended and Restated Omnibus Equity Incentive Compensation Plan (the “ Compensation Plan ”), for directors, executives, eligible employees and consultants. Existing equity incentive awards include employee non-qualified stock options, RSUs and SARs. The Company issues new Common Shares to satisfy exercises and vesting under its equity incentive awards. As of June 30, 2023, a total of 15,823,880 Common Shares were authorized for future equity incentive plan awards. The Company’s share-based compensation expense, by type of award, is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 RSUs (1) $ 1,162 $ 488 $ 1,806 $ 972 SARs 304 550 740 896 Stock options 88 109 194 141 Total share-based compensation expense (2) $ 1,554 $ 1,147 $ 2,740 $ 2,009 (1) The fair value of the RSUs granted under the Compensation Plan for the three and six months ended June 30, 2023 and 2022 was estimated at the date of grant, using the stated market price on the NYSE American. (2) Share-based compensation is included in Selling, general and administration in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). 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. Holders of unvested RSUs do not have voting rights on those RSUs. The RSUs are subject to forfeiture risk and other restrictions. Upon vesting, the employee is entitled to receive one Common Share of the Company for each RSU at no additional payment. A summary of the Company’s non-vested RSUs activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 747,425 $ 4.77 Granted 450,232 7.36 Vested (448,883) 4.24 Forfeited (7,019) 6.18 Non-vested, June 30, 2023 741,755 $ 6.64 The total intrinsic value and fair value of RSUs that vested and were settled for equity was $3.38 million for the six months ended June 30, 2023. Stock Appreciation Rights The Company may grant SARs to directors, executives and eligible employees. On January 26, 2023, the Company’s Board of Directors issued SARs under the Compensation Plan, which are intended to provide additional long-term equity incentives for the Company’s senior management. 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 $7.36 (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 last 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 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 $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 on the NYSE American equaling or exceeding $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 on the NYSE American equaling or exceeding $16.00 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 24, 2024. The fair value of the SARs granted during the six months ended June 30, 2023 was estimated at the date of grant using a Monte Carlo simulation with the following weighted average assumptions: Risk-free interest rate 3.58 % Expected life (1) 5.0 years Expected volatility (2) 55.00 % Expected dividend yield — % Weighted average grant date fair value $ 3.45 (1) Monte Carlo analysis of SARs assumes employee suboptimal exercise at first vesting time for each tranche. (2) Expected volatility is measured based on the Company’s historical share price volatility over a period equivalent to the expected life of the SARs. A summary of the Company’s SARs activity is as follows: Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2022 2,452,768 $ 4.07 Granted 308,333 7.36 Exercised (536,094) 2.92 Forfeited (10,826) 4.74 Expired — — Outstanding, June 30, 2023 2,214,181 $ 4.80 2.19 $ 3,710 Exercisable, June 30, 2023 556,049 $ 2.92 0.56 $ 1,846 A summary of the Company’s non-vested SARs activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 1,360,625 $ 2.81 Granted 308,333 3.45 Vested — — Forfeited (10,826) 3.25 Non-vested, June 30, 2023 1,658,132 $ 2.92 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 NYSE American on the last trading day before the grant date and the five-day volume weighted average price (“ VWAP ”) on the NYSE American ending on the last trading 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 fair value of the stock options granted under the Compensation Plan for the six months ended June 30, 2023 was estimated at the date of grant, using the Black-Scholes Option Valuation Model, with the following weighted average assumptions: Risk-free interest rate 3.90 % Expected life 3.25 years Expected volatility (1) 74.21 % Expected dividend yield — % Weighted average grant date fair value $ 3.92 (1) 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. A summary of the Company’s stock option activity is as follows: Range of Exercise Prices Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2022 $1.70 - $8.41 767,678 $ 3.24 Granted 5.34 - 7.36 139,211 7.12 Exercised 1.70 - 4.79 (106,757) 3.75 Forfeited 3.89 - 7.36 (29,747) 6.79 Expired 3.89 - 6.47 (7,506) 5.57 Outstanding, June 30, 2023 $1.76 - $8.41 762,879 $ 3.74 2.03 $ 2,038 Exercisable, June 30, 2023 $1.76 - $8.41 591,144 $ 2.82 1.36 $ 2,031 A summary of the Company’s non-vested stock option activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 140,586 $ 4.12 Granted 139,211 3.64 Vested (78,316) 3.73 Forfeited (29,747) 3.83 Non-vested, June 30, 2023 171,734 $ 3.96 As of June 30, 2023, there were $0.39 million, $2.34 million, and $0.69 million of unrecognized compensation costs related to the unvested stock options, RSUs and SARs, respectively. This expense is expected to be recognized over a weighted average period of 1.44 years, 2.25 years and 0.78 years respectively.

INCOME TAXES

INCOME TAXES	6 Months Ended
INCOME TAXES	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES As of June 30, 2023, the Company maintained a full valuation allowance against its net deferred tax assets. The Company continually reviews the adequacy of the valuation allowance and intends to continue maintaining a full valuation allowance on its net deferred tax assets until there is sufficient evidence to support the reversal of all or a portion of the allowance. Should the Company’s assessment change in a future period, it may release all or a portion of the valuation allowance, which would result in a deferred tax benefit in the period of adjustment. The Company will recognize the tax gain on the Alta Mesa Transaction under the installment method of accounting. This method will result in a deferral of a portion of the tax gain until the year in which the remaining proceeds are received. For the three months ended June 30, 2023, the Company did not record income tax benefit on loss before tax of $4.89 million. For the six months ended June 30, 2023, the Company did not record income tax on income before taxes of $109.38 million. As of June 30, 2023, the Company estimates that approximately $8.37 million of Net Operating Loss carryforwards will be utilized during the 2023 tax year. For the three and six months ended June 30, 2022, the Company did not record an income tax benefit on a loss before taxes of $18.06 million and $32.79 million, respectively. The effective tax rate was 0% for each of the three and six months ended June 30, 2023 and 2022, which was a result of the full valuation allowance on net deferred tax assets.

SUPPLEMENTAL FINANCIAL INFORMAT

SUPPLEMENTAL FINANCIAL INFORMATION	6 Months Ended
SUPPLEMENTAL FINANCIAL INFORMATION	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Financial Information	SUPPLEMENTAL FINANCIAL INFORMATION The components of other income (loss) are as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 Unrealized gain (loss) on investments accounted for at fair value $ 770 $ (13,419) $ (2,189) $ (16,837) Unrealized gain (loss) on marketable securities 10 (282) 335 (171) Realized gain on maturities of marketable securities 214 — 214 — Unrealized loss on convertible note (53) — (251) — Foreign exchange gain 293 2,345 319 1,132 Interest income, net and other 1,737 4 2,762 7 Other income (loss) $ 2,971 $ (11,352) $ 1,190 $ (15,869) The components of trade and other receivables are as follows: June 30, 2023 December 31, 2022 Trade receivables $ 2,406 $ 92 Notes receivable, net 343 343 Other 181 84 Total receivables $ 2,930 $ 519 The components of accounts payable and accrued liabilities are as follows: June 30, 2023 December 31, 2022 Accounts payable $ 1,585 $ 3,224 Payroll liabilities 2,121 2,929 Accrued capital expenditures 755 22 Accrued property taxes 392 240 Accrued operating expenses 430 409 Other accrued liabilities 166 105 Accounts payable and accrued liabilities $ 5,449 $ 6,929

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
COMMITMENTS AND CONTINGENCIES	Jun. 30, 2023
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 2011, the Ute Mountain Ute Tribe filed an administrative appeal of the Utah Division of Air Quality’s (“ UDAQ ”) decision to approve a Modification to the Air Quality Approval Order at the Mill. Then, 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. In August 2014, the Ute Mountain Ute Tribe filed an administrative appeal to the Utah Division of Radiation Control’s (“ DRC ”) Radioactive Materials License Amendment 7 approval regarding alternate feed material from Dawn Mining. The challenges remain open at this time and may involve the appointment of an administrative law judge (“ ALJ ”) to hear the matters. The Company does not consider these actions to have any merit. If the petitions are successful, the likely outcome would be a requirement to modify or replace the existing Air Quality Approval Order, Corrective Action Plan or license amendment, as applicable. At this time, the Company does not believe any such modifications or replacements would materially affect its financial position, results of operations or cash flows. However, the scope and costs of remediation under a revised or replaced Air Quality Approval Order, Corrective Action Plan and/or license amendment 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 are required 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. Most recently, on July 15, 2022, the routine GWDP renewal application was submitted to UDEQ for consideration. 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, the Company 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 that 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. Discussions between the Company and the Tribe are ongoing in an effort to resolve the dispute and other outstanding matters without formal adjudication. However, 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. 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, as reported in the Company’s Form 10-K for the year ended December 31, 2022, renewal costs for the remainder of 2023 are expected to total approximately $1.13 million. Surety Bonds The Company has indemnified third-party companies to provide surety bonds as collateral for the Company’s asset retirement obligations. 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 June 30, 2023, the Company has $17.46 million posted as collateral against an undiscounted asset retirement obligation of $33.00 million. As of December 31, 2022, the Company has $21.04 million posted as collateral against an undiscounted asset retirement obligation of $42.91 million. Commitments The Company is contractually obligated under a 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	6 Months Ended
FAIR VALUE ACCOUNTING	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Accounting	FAIR VALUE ACCOUNTING Assets and Liabilities Measured at Fair Value on a Recurring Basis 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). The Company’s financial instruments include cash, 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. As of June 30, 2023 and December 31, 2022, the fair values of cash, restricted cash, short-term deposits, receivables, accounts payable and accrued liabilities approximate their carrying values because of the short-term nature of these instruments. The Company’s investments in marketable equity securities are publicly traded stocks measured at fair value and classified within Level 1 and Level 2 in the fair value hierarchy. Level 1 marketable equity securities use quoted prices for identical assets in active markets, while Level 2 marketable equity securities utilize inputs based upon quoted prices for similar instruments in active markets. The Company’s investments in marketable debt securities 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 convertible note was received as part of the consideration received for the Alta Mesa Transaction was valued as of February 14, 2023 upon closing of that transaction using a binomial lattice model. The fair value calculation uses significant unobservable inputs, including: (i) volatility 60%, and (ii) yield of 9.5%. The Company used the same binomial lattice model to value the Convertible Note as of June 30, 2023. As of June 30, 2023, the fair value calculation uses significant unobservable inputs, including: (i) volatility of 60%, and (ii) yield of 10.0%. Increases or decreases in the volatility and/or the selected yield can result in an increase or decrease in the fair value of the Convertible Note. 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 June 30, 2023 and December 31, 2022. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. June 30, 2023 Level 1 Level 2 Level 3 Total Cash equivalents (1) $ — $ 23,236 $ — $ 23,236 Investments accounted for at fair value 17,366 7 — 17,373 Marketable debt securities — 63,231 — 63,231 Convertible note — — 59,206 59,206 Marketable equity securities 860 29 — 889 $ 18,226 $ 86,503 $ 59,206 $ 163,935 (1) Cash equivalents are comprised of United States Treasury Bills and Government Agency Bonds purchased within three months of their maturity date. December 31, 2022 Level 1 Level 2 Level 3 Total Cash equivalents (1) $ — $ 30,336 $ — $ 30,336 Investments accounted for at fair value 19,263 66 — 19,329 Marketable debt securities — 11,125 — 11,125 Marketable equity securities 1,033 34 — 1,067 $ 20,296 $ 41,561 $ — $ 61,857 (1) Cash equivalents are comprised of United States Treasury Bills and Government Agency Bonds purchased within three months of their maturity date. Changes in Level 3 Fair Value Measurements The following table is a reconciliation of the beginning and ending balance recorded for the Convertible Note classified as Level 3 in the fair value hierarchy. Beginning balance, February 14, 2023 $ 59,457 Unrealized loss included in other income (loss) (251) Ending balance, June 30, 2023 $ 59,206 As of June 30, 2023, the difference between the fair value of the Convertible Note and the unpaid principal amount is $0.79 million. Investments Accounted for at Fair Value The fair value of the investments is calculated as the quoted market price of the marketable equity security multiplied by the quantity of shares held by the Company. As of December 31, 2022, the Company held a 17.4% ownership interest in its investment in CUR and a 13.5% ownership interest in its investment in Virginia Energy Resources Inc. (“ Virginia Energy ”). These investments provide the Company with the ability to have significant influence, but not control, over their operations. The Company has elected the fair value option for each of these investments. As of December 31, 2022, the fair value of the Company’s investments in CUR and Virginia Energy were $16.50 million and $2.83 million, respectively. On January 24, 2023, CUR acquired 100% of the issued and outstanding common shares of Virginia Energy for 0.26 common shares of CUR per common share of Virginia Energy. As a result, the Company’s 9,439,857 common shares of Virginia Energy were converted into 2,454,362 million common shares of CUR (the “ Conversion ”). Following the Conversion, the Company owned 16,189,548 common shares of CUR, which represented an ownership interest of 16.7% in CUR as of closing. As of June 30, 2023, the fair value of the Company’s investment in CUR was $17.37 million, which represented an ownership interest of 16.3%. For the three months ended June 30, 2023 and 2022, the Company had an unrealized gain of $0.77 million and an unrealized loss of $13.42 million, respectively. The Company had an unrealized loss of $2.19 million and $16.84 million, respectively, for the six months ended June 30, 2023 and 2022. The unrealized gain (loss) related to these investments is included in Other income (loss) in the Condensed Consolidated Statement of Operations and Comprehensive Income (Loss).

REVENUE RECOGNITION AND CONTRAC

REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS	6 Months Ended
REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERS	Jun. 30, 2023
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer	REVENUE RECOGNITION AND CONTRACTS WITH CUSTOMERSAll revenue recognized is a result of contracts with customers either through uranium and vanadium sales contracts, an RE Carbonate agreement or Alternate Feed Material processing and other waste disposal agreements. The Company had satisfied all of its performance obligations as of June 30, 2023.

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	6 Months Ended
RELATED PARTY TRANSACTIONS	Jun. 30, 2023
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Robert W. Kirkwood, a member of the Company’s Board of Directors, 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 Ve nture. The Arkose Mining Venture is a contractual joint venture governed by a venture agreement dated as of January 15, 2008 and entered into by United Nuclear and Uranerz Energy Corporation, a wholly owned, indirectly held subsidiary of the Company.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Pay vs Performance Disclosure
Net income (loss)	$ (4,885)	$ 114,264	$ (18,059)	$ (14,730)	$ 109,379	$ (32,789)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	6 Months Ended
MARKETABLE SECURITIES (Tables)	Jun. 30, 2023
Cash and Cash Equivalents [Abstract]
Marketable Securities	The following table summarizes our marketable securities by significant investment categories as of June 30, 2023: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable debt securities (1) $ 63,019 $ — $ 212 $ 63,231 Convertible note (2) 59,457 (251) — 59,206 Marketable equity securities 2,876 (1,987) — 889 Total marketable securities $ 125,352 $ (2,238) $ 212 $ 123,326 (1) Marketable debt securities are comprised primarily of U.S. government agency bonds. (2) The Convertible note was received as partial consideration in the Alta Mesa Transaction (defined in Note 5 – Property, Plant and Equipment and Mineral Properties) and is valued using a binomial lattice model using Level 3 inputs. See Note 5 – Property, Plant and Equipment and Mineral Properties and Note 13 – Fair Value Accounting for more information. The following table summarizes our marketable securities by significant investment categories as of December 31, 2022: Cost Basis Gross Unrealized Losses Gross Unrealized Gains Fair Value Marketable debt securities (1) $ 11,435 $ (310) $ — $ 11,125 Marketable equity securities 2,876 (1,809) — 1,067 Total marketable securities $ 14,311 $ (2,119) $ — $ 12,192 (1) Marketable debt securities are comprised primarily of U.S. government agency bonds.

INVENTORIES (Tables)

INVENTORIES (Tables)	6 Months Ended
INVENTORIES (Tables)	Jun. 30, 2023
Inventory Disclosure [Abstract]
Schedule of Inventory, Current	June 30, 2023 December 31, 2022 Concentrates and work-in-progress $ 32,978 $ 35,476 Inventory of ore in stockpiles 256 940 Consumables 1,871 4,204 Total inventories $ 35,105 $ 40,620

PLANT AND EQUIPMENT AND MINER_2

PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables)	6 Months Ended
PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Tables)	Jun. 30, 2023
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	The following is a summary of property, plant and equipment, net: June 30, 2023 December 31, 2022 Cost Accumulated Net Book Value Cost Accumulated Net Book Property, plant and equipment Nichols Ranch $ 29,210 $ (21,238) $ 7,972 $ 29,210 $ (20,221) $ 8,989 Pinyon Plain 2,437 (784) 1,653 1,617 (714) 903 Equipment and other 20,273 (12,471) 7,802 15,009 (12,239) 2,770 Property, plant and equipment total $ 51,920 $ (34,493) $ 17,427 $ 45,836 $ (33,174) $ 12,662 As of December 31, 2022, the net book value of the property, plant and equipment attributable to Alta Mesa was $8.21 million, which was included in Property, plant and equipment and other assets held for sale, net on the Condensed Consolidated Balance Sheets.
Schedule of Summary of Mineral Properties	The following is a summary of mineral properties: June 30, 2023 December 31, 2022 Mineral properties Sheep Mountain $ 34,183 $ 34,183 Bahia Project 29,130 — Uranerz ISR properties 25,974 25,974 Roca Honda 22,095 22,095 Pinyon Plain 3,046 — Other 1,287 1,287 Mineral properties total $ 115,715 $ 83,539

ASSET RETIREMENT OBLIGATIONS _2

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)	6 Months Ended
ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH (Tables)	Jun. 30, 2023
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Change in Asset Retirement Obligation	The following table summarizes the Company’s asset retirement obligations: June 30, 2023 December 31, 2022 Asset retirement obligations, beginning of period $ 9,595 $ 13,687 Revision of estimate — (238) Accretion of liabilities 620 1,556 Held for sale (1) — (5,410) Disposal of Alta Mesa asset retirement obligations (1) (79) — Asset retirement obligations, end of period $ 10,136 $ 9,595 (1) Asset retirement obligations held for sale as of December 31, 2022 are related to Alta Mesa and are included as asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. Disposal of Alta Mesa asset retirement obligations are related to the accretion expense on Alta Mesa through the closing date and is included within Gain on sale of assets on the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss). See Note 5 – Property, Plant and Equipment and Mineral Properties for more information.
Schedule of Restricted Cash and Cash Equivalents	The following table summarizes the Company’s restricted cash: June 30, 2023 December 31, 2022 Restricted cash, beginning of period $ 17,449 $ 20,305 Additional collateral posted, net 10 734 Held for sale (1) — (3,590) Restricted cash, end of period $ 17,459 $ 17,449 (1) Restricted cash held for sale is related to Alta Mesa and is included as Asset retirement obligation and other liabilities held for sale on the Condensed Consolidated Balance Sheets. See Note 5 – Property, Plant and Equipment and Mineral Properties for more information.

BASIC AND DILUTED INCOME (LOS_2

BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE (Tables)	6 Months Ended
BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE (Tables)	Jun. 30, 2023
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The calculation of basic and diluted loss per share after adjustment for the effects of all potential dilutive Common Shares, is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 Net income (loss) attributable to owners of the Company $ (4,861) $ (18,054) $ 109,404 $ (32,783) Basic weighted average common shares outstanding 158,137,420 157,491,807 158,034,370 157,044,331 Dilutive impact of stock options and restricted stock units — — 1,156,936 — Diluted weighted average common shares outstanding 158,137,420 157,491,807 159,191,306 157,044,331 Basic net income (loss) per common share $ (0.03) $ (0.11) $ 0.69 $ (0.21) Diluted net income (loss) per common share $ (0.03) $ (0.11) $ 0.69 $ (0.21)

SHARE-BASED PAYMENTS (Tables)

SHARE-BASED PAYMENTS (Tables)	6 Months Ended
SHARE-BASED PAYMENTS (Tables)	Jun. 30, 2023
Share-Based Payment Arrangement [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The Company’s share-based compensation expense, by type of award, is as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 RSUs (1) $ 1,162 $ 488 $ 1,806 $ 972 SARs 304 550 740 896 Stock options 88 109 194 141 Total share-based compensation expense (2) $ 1,554 $ 1,147 $ 2,740 $ 2,009 (1) The fair value of the RSUs granted under the Compensation Plan for the three and six months ended June 30, 2023 and 2022 was estimated at the date of grant, using the stated market price on the NYSE American. (2) Share-based compensation is included in Selling, general and administration in the Condensed Consolidated Statements of Operations and Comprehensive Income (Loss).
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity	A summary of the Company’s non-vested RSUs activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 747,425 $ 4.77 Granted 450,232 7.36 Vested (448,883) 4.24 Forfeited (7,019) 6.18 Non-vested, June 30, 2023 741,755 $ 6.64 A summary of the Company’s SARs activity is as follows: Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2022 2,452,768 $ 4.07 Granted 308,333 7.36 Exercised (536,094) 2.92 Forfeited (10,826) 4.74 Expired — — Outstanding, June 30, 2023 2,214,181 $ 4.80 2.19 $ 3,710 Exercisable, June 30, 2023 556,049 $ 2.92 0.56 $ 1,846 A summary of the Company’s non-vested SARs activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 1,360,625 $ 2.81 Granted 308,333 3.45 Vested — — Forfeited (10,826) 3.25 Non-vested, June 30, 2023 1,658,132 $ 2.92
Share-based Payment Arrangement, Restricted Stock Unit, Activity	The fair value of the SARs granted during the six months ended June 30, 2023 was estimated at the date of grant using a Monte Carlo simulation with the following weighted average assumptions: Risk-free interest rate 3.58 % Expected life (1) 5.0 years Expected volatility (2) 55.00 % Expected dividend yield — % Weighted average grant date fair value $ 3.45 (1) Monte Carlo analysis of SARs assumes employee suboptimal exercise at first vesting time for each tranche. (2) Expected volatility is measured based on the Company’s historical share price volatility over a period equivalent to the expected life of the SARs.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The fair value of the stock options granted under the Compensation Plan for the six months ended June 30, 2023 was estimated at the date of grant, using the Black-Scholes Option Valuation Model, with the following weighted average assumptions: Risk-free interest rate 3.90 % Expected life 3.25 years Expected volatility (1) 74.21 % Expected dividend yield — % Weighted average grant date fair value $ 3.92 (1) 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, Stock Options, Activity	A summary of the Company’s stock option activity is as follows: Range of Exercise Prices Number of Shares Weighted Average Weighted Average Remaining Contractual Life (Years) Intrinsic Value Outstanding, December 31, 2022 $1.70 - $8.41 767,678 $ 3.24 Granted 5.34 - 7.36 139,211 7.12 Exercised 1.70 - 4.79 (106,757) 3.75 Forfeited 3.89 - 7.36 (29,747) 6.79 Expired 3.89 - 6.47 (7,506) 5.57 Outstanding, June 30, 2023 $1.76 - $8.41 762,879 $ 3.74 2.03 $ 2,038 Exercisable, June 30, 2023 $1.76 - $8.41 591,144 $ 2.82 1.36 $ 2,031 A summary of the Company’s non-vested stock option activity is as follows: Number of Shares Weighted Average Grant Date Fair Value Non-vested, December 31, 2022 140,586 $ 4.12 Granted 139,211 3.64 Vested (78,316) 3.73 Forfeited (29,747) 3.83 Non-vested, June 30, 2023 171,734 $ 3.96

SUPPLEMENTAL FINANCIAL INFORM_2

SUPPLEMENTAL FINANCIAL INFORMATION (Tables)	6 Months Ended
SUPPLEMENTAL FINANCIAL INFORMATION (Tables)	Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Other Nonoperating Income (Expense)	The components of other income (loss) are as follows: Three Months Ended Six Months Ended 2023 2022 2023 2022 Unrealized gain (loss) on investments accounted for at fair value $ 770 $ (13,419) $ (2,189) $ (16,837) Unrealized gain (loss) on marketable securities 10 (282) 335 (171) Realized gain on maturities of marketable securities 214 — 214 — Unrealized loss on convertible note (53) — (251) — Foreign exchange gain 293 2,345 319 1,132 Interest income, net and other 1,737 4 2,762 7 Other income (loss) $ 2,971 $ (11,352) $ 1,190 $ (15,869)
Schedule of Accounts, Notes, Loans and Financing Receivable	The components of trade and other receivables are as follows: June 30, 2023 December 31, 2022 Trade receivables $ 2,406 $ 92 Notes receivable, net 343 343 Other 181 84 Total receivables $ 2,930 $ 519
Schedule of Accounts Payable and Accrued Liabilities	The components of accounts payable and accrued liabilities are as follows: June 30, 2023 December 31, 2022 Accounts payable $ 1,585 $ 3,224 Payroll liabilities 2,121 2,929 Accrued capital expenditures 755 22 Accrued property taxes 392 240 Accrued operating expenses 430 409 Other accrued liabilities 166 105 Accounts payable and accrued liabilities $ 5,449 $ 6,929

FAIR VALUE ACCOUNTING (Tables)

FAIR VALUE ACCOUNTING (Tables)	6 Months Ended
FAIR VALUE ACCOUNTING (Tables)	Jun. 30, 2023
Fair Value Disclosures [Abstract]
Fair Value Measurements, Recurring and Nonrecurring	June 30, 2023 Level 1 Level 2 Level 3 Total Cash equivalents (1) $ — $ 23,236 $ — $ 23,236 Investments accounted for at fair value 17,366 7 — 17,373 Marketable debt securities — 63,231 — 63,231 Convertible note — — 59,206 59,206 Marketable equity securities 860 29 — 889 $ 18,226 $ 86,503 $ 59,206 $ 163,935 (1) Cash equivalents are comprised of United States Treasury Bills and Government Agency Bonds purchased within three months of their maturity date. December 31, 2022 Level 1 Level 2 Level 3 Total Cash equivalents (1) $ — $ 30,336 $ — $ 30,336 Investments accounted for at fair value 19,263 66 — 19,329 Marketable debt securities — 11,125 — 11,125 Marketable equity securities 1,033 34 — 1,067 $ 20,296 $ 41,561 $ — $ 61,857 (1) Cash equivalents are comprised of United States Treasury Bills and Government Agency Bonds purchased within three months of their maturity date.
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation	The following table is a reconciliation of the beginning and ending balance recorded for the Convertible Note classified as Level 3 in the fair value hierarchy. Beginning balance, February 14, 2023 $ 59,457 Unrealized loss included in other income (loss) (251) Ending balance, June 30, 2023 $ 59,206 As of June 30, 2023, the difference between the fair value of the Convertible Note and the unpaid principal amount is $0.79 million.

MARKETABLE SECURITIES - Schedul

MARKETABLE SECURITIES - Schedule of Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Marketable Debt Securities and Convertible Note
Cost Basis		$ 11,435
Gross Unrealized Losses		(310)
Gross Unrealized Gains		0
Fair Value		11,125
Marketable equity securities
Cost Basis	$ 2,876	2,876
Gross Unrealized Losses	(1,987)	(1,809)
Gross Unrealized Gains	0	0
Fair Value	889	1,067
Cost Basis	125,352	14,311
Gross Unrealized Losses	2,238	2,119
Gross Unrealized Gains	212	0
Fair Value	123,326	$ 12,192
Marketable Debt Securities
Marketable Debt Securities and Convertible Note
Cost Basis	63,019
Gross Unrealized Losses	0
Gross Unrealized Gains	212
Fair Value	63,231
Convertible Note
Marketable Debt Securities and Convertible Note
Cost Basis	59,457
Gross Unrealized Losses	(251)
Gross Unrealized Gains	0
Fair Value	$ 59,206

INVENTORIES - Schedule of Inven

INVENTORIES - Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Inventory [Line Items]
Concentrates and work-in-progress	$ 32,978	$ 35,476
Inventory of ore in stockpiles	256	940
Consumables	1,871	4,204
Total inventories	35,105	40,620
Current	32,978	38,155
Long term	$ 2,127	$ 2,465

PLANT AND EQUIPMENT AND MINER_3

PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Cost	$ 51,920	$ 45,836
Accumulated Depreciation	(34,493)	(33,174)
Net Book Value	17,427	12,662
Nichols Ranch
Property, Plant and Equipment [Line Items]
Cost	29,210	29,210
Accumulated Depreciation	(21,238)	(20,221)
Net Book Value	7,972	8,989
Alta Mesa(1)
Property, Plant and Equipment [Line Items]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment		8,210
Pinyon Plain
Property, Plant and Equipment [Line Items]
Cost	2,437	1,617
Accumulated Depreciation	(784)	(714)
Net Book Value	1,653	903
Equipment and other
Property, Plant and Equipment [Line Items]
Cost	20,273	15,009
Accumulated Depreciation	(12,471)	(12,239)
Net Book Value	$ 7,802	$ 2,770

PLANT AND EQUIPMENT AND MINER_4

PLANT AND EQUIPMENT AND MINERAL PROPERTIES - Schedule of Summary of Mineral Properties (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Mineral properties	$ 115,715	$ 83,539
Sheep Mountain
Property, Plant and Equipment [Line Items]
Mineral properties	34,183	34,183
Bahia Project
Property, Plant and Equipment [Line Items]
Mineral properties	29,130	0
Uranerz ISR properties
Property, Plant and Equipment [Line Items]
Mineral properties	25,974	25,974
Roca Honda
Property, Plant and Equipment [Line Items]
Mineral properties	22,095	22,095
Pinyon Plain
Property, Plant and Equipment [Line Items]
Mineral properties	3,046	0
Other
Property, Plant and Equipment [Line Items]
Mineral properties	$ 1,287	$ 1,287

PLANT AND EQUIPMENT AND MINER_5

PLANT AND EQUIPMENT AND MINERAL PROPERTIES (Narrative) (Details) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended		12 Months Ended
	May 03, 2023 USD ($)	Feb. 14, 2023 USD ($) subsidiary $ / shares	Feb. 10, 2023 USD ($) mi purchaseAgreement a	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Property, Plant and Equipment [Line Items]
Depreciation expense				$ 660	$ 870	$ 1,319	$ 1,679
Number of purchase agreements \| purchaseAgreement			2
Purchase Agreement, acres to purchase \| a			37,300
Purchase Agreement, miles to purchase \| mi			58.3
Purchase Agreement, purchase price			$ 27,500
Purchase Agreement, payment due at closing			21,600
Purchase Agreement, deposit payment			5,900
Purchase Agreement, direct deal costs			$ 1,630
Gain on sale of assets				2,807		119,257	0
Restricted Cash And Cash Equivalents Held For Sale						0		$ 3,590
Increase (Decrease) In Restricted Cash						(3,590)	0
Additions to property, plant and equipment						5,467	705
Alta Mesa Divestiture
Property, Plant and Equipment [Line Items]
Number Of Subsidiaries Sold \| subsidiary		3
Disposal Group, Including Discontinued Operation, Consideration		$ 120,000
Proceeds from Divestiture of Interest in Consolidated Subsidiaries		60,000
Disposal Group, Cash Due Prior To Closing		6,000
Disposal Group, Cash Due At Closing		54,000
Noncash or Part Noncash Divestiture, Amount of Consideration Received		$ 60,000
Convertible Note Receivable, Term		2 years
Convertible Notes Receivable, Interest Rate		8%
Convertible Notes Receivable, Conversion Price Per Share \| $ / shares		$ 2.9103
Convertible Notes Receivable, Premium		20%
Convertible Notes Receivable, Conversion Limitation Per Transaction		$ 10,000
Convertible Notes Receivable, Conversion Period		30 days
Gain on sale of assets		$ 116,500
Disposal Group, Cash To Be Received		119,460
Notes Receivable, Amortized cost		59,460
Disposal Group, Including Discontinued Operation, Assets		$ 3,400
Restricted Cash And Cash Equivalents Held For Sale				3,590
Increase (Decrease) In Restricted Cash						3,590
Proceeds from Sale of Productive Assets	$ 3,100
Additions to property, plant and equipment	500
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment	$ 350
Disposal Group, Including Discontinued Operation, Property, Plant And Equipment, Usage Period	20 years
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	$ 2,750
Nichols Ranch
Property, Plant and Equipment [Line Items]
Depreciation				$ 80	$ 50	$ 160	$ 50

ASSET RETIREMENT OBLIGATIONS _3

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Schedule of Change in Asset Retirement Obligation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset retirement obligations, beginning of period			$ 9,595	$ 13,687	$ 13,687
Revision of estimate			0	445	238
Accretion of liabilities	$ 274	$ 510	620	$ 904	1,556
Held for sale(1)	0		0		(5,410)
Disposal of Alta Mesa asset retirement obligations (1)			(79)		0
Asset retirement obligations, end of period	$ 10,136		$ 10,136		$ 9,595

ASSET RETIREMENT OBLIGATIONS _4

ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Schedule of Restricted Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Restricted Cash And Cash Equivalents [Roll Forward]
Restricted cash, beginning of period	$ 17,449	$ 20,305
Additional collateral posted, net	10	734
Restricted Cash And Cash Equivalents Held For Sale	0	(3,590)
Restricted cash, end of period	$ 17,459	$ 17,449

CAPITAL STOCK - Narrative (Deta

CAPITAL STOCK - Narrative (Details) - At The Market Sale Of Stock - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued (in shares)	360	0	770
Sale of stock, consideration received	$ 3,720		$ 7,890

BASIC AND DILUTED INCOME (LOS_3

BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income (loss) attributable to owners of the Company	$ (4,861)	$ (18,054)	$ 109,404	$ (32,783)
Basic weighted average common shares outstanding	158,137,420	157,491,807	158,034,370	157,044,331
Dilutive impact of stock options and restricted stock units	0	0	1,156,936	0
Diluted weighted average common shares outstanding	158,137,420	157,491,807	159,191,306	157,044,331
Basic net income (loss) per common share	$ (0.03)	$ (0.11)	$ 0.69	$ (0.21)
Diluted net income (loss) per common share	$ (0.03)	$ (0.11)	$ 0.69	$ (0.21)

BASIC AND DILUTED INCOME (LOS_4

BASIC AND DILUTED INCOME (LOSS) PER COMMON SHARE - Narrative (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	1,500	1,550	310	1,520
Stock Appreciation Rights (SARs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities (in shares)	2,300	2,450	2,310	2,310

SHARE-BASED PAYMENTS - Narrativ

SHARE-BASED PAYMENTS - Narrative (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award exercise period	5 years
Grants in period, weighted average exercise price (in dollars per share)	$ 7.12
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares) \| shares	15,823,880
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Unrecognized compensation costs related to unvested stock options \| $	$ 390
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	1 year 5 months 8 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Unrecognized compensation costs related to RSU awards \| $	$ 2,340
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years 3 months
Intrinsic value	$ 3,380,000
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Unrecognized compensation costs related to RSU awards \| $	$ 690
Share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	9 months 10 days
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants in period, weighted average exercise price (in dollars per share)	$ 7.36
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)	$ 12
Period of exercise price	90 days
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)	$ 14
Period of exercise price	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)	$ 16
Period of exercise price	90 days
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)	$ 7.36

SHARE-BASED PAYMENTS - Schedule

SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Restricted Stock, Restricted Stock Units Activity and SAR's (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 1,554	$ 1,147	$ 2,740	$ 2,009
Equity Option
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)			$ 4.12
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 3.96		$ 3.96
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 88	109	$ 194	141
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unrecognized Compensation Costs Related To Unvested Stock Options			390
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 1,162	488	$ 1,806	972
Restricted Stock Units (RSUs) \| Equity 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)			747,425
Granted, nonvested, number of shares (in shares)			450,232
Vested, number of shares (in shares)			(448,883)
Forfeited, number of shares (in shares)			(7,019)
Number of nonvested shares, end of period (in shares)	741,755		741,755
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)			$ 4.77
Granted, nonvested, weighted average grant date fair value (in dollars per share)			7.36
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			6.18
Vested, weighted average grant date fair value (in dollars per share)			4.24
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 6.64		$ 6.64
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 304	$ 550	$ 740	$ 896
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)			2,452,768
Granted, nonvested, number of shares (in shares)			308,333
Exercised, number of shares (in shares)			(536,094)
Forfeited, number of shares (in shares)			(10,826)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Expirations			0
Number of nonvested shares, end of period (in shares)	2,214,181		2,214,181
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)			$ 4.07
Granted, nonvested, weighted average grant date fair value (in dollars per share)			7.36
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Exercised, Weighted Average Exercise Price			2.92
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			4.74
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expired, Weighted Average Grant Date Fair			0
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 4.80		$ 4.80
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Number	556,049		556,049
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Exercise Price	$ 2.92		$ 2.92
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms			2 years 2 months 8 days
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Weighted Average Remaining Contractual Term			6 months 21 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding	$ 3,710		$ 3,710
Share-Based Compensation Arrangement By Share-Based Payment Award, Non-Option Equity Instruments, Exercisable, Aggregate Intrinsic Value	$ 1,846		$ 1,846
Stock Appreciation Rights (SARs) \| Equity 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)			1,360,625
Granted, nonvested, number of shares (in shares)			308,333
Vested, number of shares (in shares)			0
Forfeited, number of shares (in shares)			(10,826)
Number of nonvested shares, end of period (in shares)	1,658,132		1,658,132
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)			$ 2.81
Granted, nonvested, weighted average grant date fair value (in dollars per share)			3.45
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			3.25
Vested, weighted average grant date fair value (in dollars per share)			0
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 2.92		$ 2.92

SHARE-BASED PAYMENTS - Schedu_2

SHARE-BASED PAYMENTS - Schedule of Share-based Payment, SARs, Valuation Assumptions (Details) - Stock Appreciation Rights (SARs)	6 Months Ended
	Jun. 30, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	3.58%
Expected life	5 years
Expected volatility(1)	55%
Expected dividend yield	0%
Weighted average grant date fair value	$ 3.45

SHARE-BASED PAYMENTS - Schedu_3

SHARE-BASED PAYMENTS - Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions (Details) - Employee Stock Option	6 Months Ended
	Jun. 30, 2023 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	3.90%
Expected life	3 years 3 months
Expected volatility(1)	74.21%
Expected dividend yield	0%
Weighted average grant date fair value	$ 3.92

SHARE-BASED PAYMENTS - Schedu_4

SHARE-BASED PAYMENTS - Schedule of Share-based Compensation, Stock Options, Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares shares
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)	$ 3.24
Grants in period, weighted average exercise price (in dollars per share)	7.12
Exercises in period, weighted average exercise price (in dollars per share)	3.75
Forfeitures in period, weighted average exercise price (in dollars per share)	6.79
Expirations in period, weighted average exercise price (in dollars per share)	5.57
Weighted average exercise price, end of period (in dollars per share)	3.74
Exercisable options, weighted average exercise price (in dollars per share)	$ 2.82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options, beginning of period (in shares) \| shares	767,678
Number of grants in period, net of forfeitures (in shares) \| shares	139,211
Number of forfeitures in period (in shares) \| shares	(29,747)
Number of expirations in period (in shares) \| shares	(7,506)
Number of options, end of period (in shares) \| shares	762,879
Number of exercisable options (in shares) \| shares	591,144
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 10 days
Exercisable options, weighted average remaining contractual term	1 year 4 months 9 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value \| $	$ 2,038
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value \| $	$ 2,031
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period \| shares	106,757
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
Grants in period, weighted average exercise price (in dollars per share)	5.34
Exercises in period, weighted average exercise price (in dollars per share)	1.70
Forfeitures in period, weighted average exercise price (in dollars per share)	3.89
Expirations in period, weighted average exercise price (in dollars per share)	3.89
Weighted average exercise price, end of period (in dollars per share)	1.76
Exercisable options, weighted average exercise price (in dollars per share)	1.76
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)	8.41
Grants in period, weighted average exercise price (in dollars per share)	7.36
Exercises in period, weighted average exercise price (in dollars per share)	4.79
Forfeitures in period, weighted average exercise price (in dollars per share)	7.36
Expirations in period, weighted average exercise price (in dollars per share)	6.47
Weighted average exercise price, end of period (in dollars per share)	8.41
Exercisable options, weighted average exercise price (in dollars per share)	$ 8.41
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Exercisable options, weighted average remaining contractual term	10 years
Equity 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) \| shares	140,586
Granted, nonvested, number of shares (in shares) \| shares	139,211
Vested, number of shares (in shares) \| shares	(78,316)
Nonvested options forfeited, number of shares (in shares) \| shares	(29,747)
Number of nonvested shares, end of period (in shares) \| shares	171,734
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)	$ 4.12
Granted, nonvested, weighted average grant date fair value (in dollars per share)	3.64
Vested, weighted average grant date fair value (in dollars per share)	3.73
Nonvested options forfeited, weighted average grant date fair value (in dollars per share)	3.83
Nonvested, weighted average grant date fair value, end of period (in dollars per share)	$ 3.96

INCOME TAXES (Details)

INCOME TAXES (Details) - USD ($)	3 Months Ended				6 Months Ended
INCOME TAXES (Details) - USD ($)	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income tax provision	$ 0		$ 0			$ 0
Net income (loss)	$ (4,885,000)	$ 114,264,000	$ (18,059,000)	$ (14,730,000)	$ 109,379,000	$ (32,789,000)
Effective income tax rate	0%		0%
Net Operating Loss carryforwards	$ 8,370,000				$ 8,370,000

SUPPLEMENTAL FINANCIAL INFORM_3

SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Other Nonoperating Income (Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Unrealized gain (loss) on investments accounted for at fair value	$ 770	$ (13,419)	$ (2,189)	$ (16,837)
Unrealized gain (loss) on marketable securities	10	(282)	335	(171)
Realized gain on maturities of marketable securities	214	0	214	0
Unrealized loss on convertible note	(53)	0	(251)	0
Foreign exchange gain	293	2,345	319	1,132
Interest income, net and other	1,737	4	2,762	7
Other income (loss)	$ 2,971	$ (11,352)	$ 1,190	$ (15,869)

SUPPLEMENTAL FINANCIAL INFORM_4

SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Trade receivables	$ 2,406	$ 92
Notes receivable, net	343	343
Other	181	84
Total receivables	$ 2,930	$ 519

SUPPLEMENTAL FINANCIAL INFORM_5

SUPPLEMENTAL FINANCIAL INFORMATION - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable	$ 1,585	$ 3,224
Payroll liabilities	2,121	2,929
Accrued capital expenditures	755	22
Accrued property taxes	392	240
Accrued operating expenses	430	409
Other accrued liabilities	166	105
Accounts payable and accrued liabilities	$ 5,449	$ 6,929

SUPPLEMENTAL FINANCIAL INFORM_6

SUPPLEMENTAL FINANCIAL INFORMATION - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Accounts And Other Receivables, Net	$ 181	$ 84

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - (Narrative) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Asset retirement obligation	$ 10,136	$ 9,595	$ 13,687
Mining Properties and Mineral Rights
Other Commitments [Line Items]
Renewal costs	1,130
Canyon Project
Other Commitments [Line Items]
Loss contingency, estimate of possible loss	17,460	21,040
Asset retirement obligation	$ 33,000	$ 42,910

FAIR VALUE ACCOUNTING - Fair Va

FAIR VALUE ACCOUNTING - Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments fair value	$ 163,935	$ 61,857
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents(1)	23,236	30,336
Investments accounted for at fair value	17,373	19,329
Fair Value, Recurring \| Marketable Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	63,231	11,125
Fair Value, Recurring \| Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	59,206
Fair Value, Recurring \| Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	889	1,067
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments fair value	18,226	20,296
Level 1 \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents(1)	0	0
Investments accounted for at fair value	17,366	19,263
Level 1 \| Fair Value, Recurring \| Marketable Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	0	0
Level 1 \| Fair Value, Recurring \| Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	0
Level 1 \| Fair Value, Recurring \| Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	860	1,033
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments fair value	86,503	41,561
Level 2 \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents(1)	23,236	30,336
Investments accounted for at fair value	7	66
Level 2 \| Fair Value, Recurring \| Marketable Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	63,231	11,125
Level 2 \| Fair Value, Recurring \| Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	0
Level 2 \| Fair Value, Recurring \| Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	29	34
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments fair value	59,206	0
Level 3 \| Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents(1)	0	0
Investments accounted for at fair value	0	0
Level 3 \| Fair Value, Recurring \| Marketable Debt Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	0	0
Level 3 \| Fair Value, Recurring \| Convertible Note
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	59,206
Level 3 \| Fair Value, Recurring \| Marketable Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable Securities, Fair Value	$ 0	$ 0

FAIR VALUE ACCOUNTING - Narrati

FAIR VALUE ACCOUNTING - Narrative (Details) $ in Thousands				3 Months Ended			5 Months Ended	6 Months Ended
FAIR VALUE ACCOUNTING - Narrative (Details) $ in Thousands	Mar. 31, 2023 mi	Feb. 14, 2023 mi	Jan. 24, 2023 shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change In Value Of Investments Accounted At Fair Value				$ 770		$ (13,419)		$ (2,189)	$ (16,837)
Convertible Note, decrease in fair value							$ 790
Measurement Input, Price Volatility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Receivable, Fair Value Measurement Input \| mi	0.60	0.60
Measurement Input, Yield
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notes Receivable, Fair Value Measurement Input \| mi	0.100	0.095
Virginia Energy Resources Inc. \| CUR
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			100%
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share \| shares			0.26
Business Combination, Number of Common Stock Shares Acquired \| shares			9,439,857
Business Combination, Acquired Shares Converted To Common Stock \| shares			2,454,362
Virginia Energy Resources Inc. \| Energy Fuels
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Shares Converted Into Common Stock \| shares			16,189,548
CUR \| Energy Fuels
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired			16.70%
Virginia Energy Resources Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage Of Fair Value Investment					13.50%
Virginia Energy Resources Inc. \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value										$ 2,830
Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage Of Fair Value Investment					17.40%			16.30%
Investments accounted for at fair value				$ 17,370			$ 17,370	$ 17,370
Consolidated Uranium Inc. \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value										$ 16,500

FAIR VALUE ACCOUNTING - Schedul

FAIR VALUE ACCOUNTING - Schedule of Fair Value Reconciliation Rollforwardd (Details) $ in Thousands	5 Months Ended
	Jun. 30, 2023 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized loss included in other income (loss)	$ (251)
Notes Receivable
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, February 14, 2023	59,457
Ending balance, June 30, 2023	$ 59,206

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Revenues	$ 6,863	$ 6,467	$ 26,476	$ 9,404
Accounts And Other Receivables, Net	181		181		$ 84
Current receivables	2,930		2,930		519
Other long-term receivables	1,532		1,532		1,537
Consolidated Uranium Inc.
Related Party Transaction [Line Items]
Revenues	180	130	450	400
Current receivables	180	$ 80	180	$ 80
Other long-term receivables	$ 1,530		$ 1,530		$ 1,580
United Nuclear \| Director \| Arkose Mining Venture
Related Party Transaction [Line Items]
Equity method, ownership percentage	19%		19%
Energy Fuels \| Director \| Arkose Mining Venture
Related Party Transaction [Line Items]
Equity method, ownership percentage	81%		81%