Fathom Digital Manufacturing Corporation - Ordinary Shares (FATH) 10-Q15 Aug 222022 Q2 Quarterly reportFinancial data

Company Profile

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2022	Aug. 12, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Registrant Name	Fathom Digital Manufacturing Corporation
Entity Central Index Key	0001836176
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Shell Company	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity File Number	001-39994
Entity Tax Identification Number	98-1571400
Entity Address, Address Line One	1050 Walnut Ridge Drive
Entity Address, City or Town	Hartland
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	53029
City Area Code	262
Local Phone Number	367-8254
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Document Transition Report	false
Common Class A [Member]
Document Information [Line Items]
Trading Symbol	FATH
Entity Common Stock, Shares Outstanding		61,596,519
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Security Exchange Name	NYSE
Warrants To Purchase Class A Common Stock [Member]
Document Information [Line Items]
Trading Symbol	FATH.WS
Title of 12(b) Security	Warrants to purchase Class A common stock
Security Exchange Name	NYSE
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		74,014,640

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands		Jun. 30, 2022	Dec. 31, 2021
Current assets
Cash		$ 11,118	$ 20,357
Accounts receivable, net	[1]	26,402	25,367
Inventory		14,100	13,165
Prepaid expenses and other current assets		3,802	1,836
Total current assets		55,422	60,725
Property and equipment, net		46,908	44,527
Right-of-use operating lease assets, net		8,081
Right-of-use financing lease assets, net		2,363
Intangible assets, net		260,483	269,622
Goodwill		1,188,441	1,189,464
Other non-current assets		1,415	2,036
Total assets		1,563,113	1,566,374
Current liabilities
Accounts payable	[2]	11,468	9,409
Accrued expenses		7,254	5,957
Current operating lease liability		2,976
Current financing lease liability		190
Contingent consideration		700	2,748
Current portion of debt		31,179	29,697
Other current liabilities		3,767	2,058
Total current liabilities		57,534	49,869
Long-term debt, net		117,677	120,491
Fathom earnout shares liability		27,690	64,300
Sponsor earnout shares liability		4,090	9,380
Warrant liability		13,300	33,900
Noncurrent contingent consideration			850
Noncurrent operating lease liability		5,160
Noncurrent financing lease liability		2,227
Deferred tax liability		12,335	17,570
Other noncurrent liabilities			4,655
Payable to related parties pursuant to the tax receivable agreement (includes $4,440 and $4,600 at fair value, respectively)		9,400	4,600
Total liabilities		249,413	305,615
Commitments and Contingencies:
Redeemable non-controlling interest in Fathom OpCo		749,615	841,982
Shareholders' Equity:
Preferred Stock, $.0001 par value; 10,000,000 shares authorized; 0 shares issued and outstanding as of December 31, 2022 and December 31, 2021
Treasury stock, at cost; 301,302 and 0 shares as of June 30, 2022 and December 31, 2021, respectively		(2,258)
Additional paid-in-capital		556,417	466,345
Retained earnings (Accumulated deficit)		9,913	(47,581)
Shareholders' equity attributable to Fathom Digital Manufacturing Corporation		564,085	418,777
Total Liabilities, Shareholders' Equity, and Redeemable Non-Controlling Interest		1,563,113	1,566,374
Class A Common Shares
Shareholders' Equity:
Common stock		6	5
Class B Common Shares
Shareholders' Equity:
Common stock		7	8
Class C Common Stock [Member]
Shareholders' Equity:
Common stock		$ 0	$ 0

[1] Inclusive of allowance for doubtful accounts of $ 1,208 and $ 1,150 as of June 30, 2022 and December 31, 2021, respectively Inclusive of accounts payable to related parties of $ 443 and $ 1,246 as of June 30, 2022 and December 31, 2021, respectively

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair value of payable to related parties pursuant to the tax receivable agreement	$ 4,440	$ 4,600
Common stock, shares authorized (in shares)	500,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Allowance for doubtful accounts	$ 1,208	$ 1,150
Accounts payable, Related parties, Current	$ 443	$ 1,246
Treasury stock (in shares)	301,302	0
Class A Common Shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	300,000,000	300,000,000
Common stock, shares issued (in shares)	61,596,519	50,785,656
Common stock, shares outstanding	61,596,519	50,785,656
Class B Common Shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	180,000,000	180,000,000
Common stock, shares issued (in shares)	74,014,640	84,294,971
Common stock, shares outstanding	74,014,640	84,294,971
Class C Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	0	0
Common stock, shares outstanding	0	0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue		$ 41,985	$ 35,872	$ 82,526	$ 66,406
Cost of revenue	[1],[2],[3]	26,437	22,376	54,981	39,499
Gross profit		15,548	13,496	27,545	26,907
Operating expenses
Selling, general, and administrative	[4]	11,617	8,760	26,381	16,430
Depreciation and amortization		4,452	2,535	8,968	5,207
Total operating expenses		16,069	11,295	35,349	21,637
Operating (loss) income		(521)	2,201	(7,804)	5,270
Interest expense and other (income) expense
Interest expense		1,858	2,310	3,332	4,424
Other expense		129	7,110	195	8,650
Other income		(36,108)	(3,206)	(63,223)	(3,300)
Total interest expense and other (income) expense, net		(34,121)	6,214	(59,696)	9,774
Net income (loss) before income tax		33,601	(4,013)	51,892	(4,504)
Income tax (benefit) expense		(378)	69	79	78
Net income (loss)		33,979	(4,082)	51,813	(4,582)
Net loss attributable to Fathom OpCo non-controlling interest (Note 14)		(442)		(5,702)
Net income attributable to controlling interest		34,421	(4,082)	57,515	(4,582)
Comprehensive income (loss):
Loss from foreign currency translation adjustments			2	(107)	(105)
Comprehensive income (loss), net of tax		$ 34,421	$ (4,080)	$ 57,408	$ (4,687)
Class A and Class B Common Unit
Net income (loss) per unit attributable to common stock/unit holders
Basic	[5]		$ 1.55		$ 1.90
Diluted	[5]		$ 1.55		$ 1.90
Weighted average common shares outstanding
Basic			7,723,592		7,723,592
Diluted			7,723,592		7,723,592
Class A Common Shares
Net income (loss) per unit attributable to common stock/unit holders
Basic		$ 0.66		$ 1.12
Diluted		$ 0.25		$ 0.43
Weighted average common shares outstanding
Basic		52,259,885		51,530,961
Diluted		135,524,773		135,305,168

[1] In clusive of $ 0 and $ 0 of inventory step-up amortization for the three months ended June 30, 2022 and June 30, 2021, respectively; and $ 3,241 and $ 277 for the six months ended June 30, 2022 and June 30, 2021, respectively; Inclusive of $ 443 and $ 3,854 of cost of revenue related to inventory purchases from a related party for the three months ended June 30, 2022 and June 30, 2021, respectively; and $ 1,552 and $ 4,434 for the six months ended June 30, 2022 and June 30, 2021, respectively; Inclusive of $ 1,541 and $ 695 of depreciation and amortization for the three months ended June 30, 2022 and June 30, 2021, respectively; and of $ 3,236 and $ 1,549 for the six months ended June 30, 2022 and June 30, 2021, respectively; Inclusive o f $ 11 and $ 482 of management fees incurred to a related party for the three months ended June 30, 2022 and June 30, 2021, respectively; and $ 82 and $ 835 for the six months ended June 30, 2022 and June 30, 2021, respectively; and Basic and diluted net loss per unit amounts are the same for both Class A common units and Class B common units. See Note 13.

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cost, depreciation and amortization	$ 1,541	$ 695	$ 3,236	$ 1,549
Inventory step up amortization.	0	0	3,241	277
Management Services Agreement [Member]
Related party transactions, expenses	11	482	82	835
Related Party [Member]
Cost, inventory purchases from related party	$ 443	$ 3,854	$ 1,552	$ 4,434

Consolidated Statement of Share

Consolidated Statement of Shareholders' Equity and Redeemable Non-Controlling Interest (Successor) and Class A Contingently Redeemable Preferred Units and Members' Equity (Predecessor) (Unaudited) - USD ($) $ in Thousands	Total	Revision of Prior Period, Accounting Standards Update, Adjustment	Class B Common Shares	Class A Contingently Redeemable Preferred Equity	Common Stock	Common Stock Class A Common Shares	Common Stock Class B Common Shares	Common Stock Class A Common Units	Common Stock Class B Common Units	Common Stock Class A Contingently Redeemable Preferred Equity	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Deficit Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Other Comprehensive Income (Loss)	Redeemable Non-controlling Interest
Opening Balance, Shares, Contingently Redeemable Preferred Units at Dec. 31, 2020				1,167,418
Opening Balance, Value, Contingently Redeemable Preferred Units at Dec. 31, 2020				$ 54,105
Shareholders' equity beginning balance at Dec. 31, 2020					$ 36,019			$ 35,869	$ 14,450				$ (14,232)		$ (68)
Shareholders' equity beginning balance (in shares) at Dec. 31, 2020								5,480,611	2,242,981
Net income (loss)					(500)								(500)
Foreign currency translation adjustment					(107)										(107)
Shareholders' equity ending balance at Mar. 31, 2021					35,412			$ 35,869	$ 14,450				(14,732)		(175)
Shareholders' equity ending balance (in shares) at Mar. 31, 2021								5,480,611	2,242,981
Ending Balance, Value, Contingently Redeemable Preferred Units at Mar. 31, 2021										$ 54,105
Ending Balance, Shares, Contingently Redeemable Preferred Units at Mar. 31, 2021										1,167,418
Opening Balance, Shares, Contingently Redeemable Preferred Units at Dec. 31, 2020				1,167,418
Opening Balance, Value, Contingently Redeemable Preferred Units at Dec. 31, 2020				$ 54,105
Shareholders' equity beginning balance at Dec. 31, 2020					36,019			$ 35,869	$ 14,450				(14,232)		(68)
Shareholders' equity beginning balance (in shares) at Dec. 31, 2020								5,480,611	2,242,981
Net income (loss)	$ (4,582)
Foreign currency translation adjustment	(105)
Shareholders' equity ending balance at Jun. 30, 2021	31,363							$ 35,869	$ 14,481				(18,814)		(173)
Shareholders' equity ending balance (in shares) at Jun. 30, 2021								5,480,611	2,242,981
Ending Balance, Value, Contingently Redeemable Preferred Units at Jun. 30, 2021										$ 54,105
Ending Balance, Shares, Contingently Redeemable Preferred Units at Jun. 30, 2021										1,167,418
Opening Balance, Shares, Contingently Redeemable Preferred Units at Mar. 31, 2021										1,167,418
Opening Balance, Value, Contingently Redeemable Preferred Units at Mar. 31, 2021										$ 54,105
Shareholders' equity beginning balance at Mar. 31, 2021					35,412			$ 35,869	$ 14,450				(14,732)		(175)
Shareholders' equity beginning balance (in shares) at Mar. 31, 2021								5,480,611	2,242,981
Equity based compensation					31				$ 31
Net income (loss)	(4,082)				(4,082)								(4,082)
Foreign currency translation adjustment	2				$ (2)										2
Shareholders' equity ending balance at Jun. 30, 2021	31,363							$ 35,869	$ 14,481				(18,814)		$ (173)
Shareholders' equity ending balance (in shares) at Jun. 30, 2021								5,480,611	2,242,981
Ending Balance, Value, Contingently Redeemable Preferred Units at Jun. 30, 2021										$ 54,105
Ending Balance, Shares, Contingently Redeemable Preferred Units at Jun. 30, 2021										1,167,418
Shareholder's equity beginning balance at Dec. 31, 2021	418,777					$ 5	$ 8					$ 466,345	(47,581)
Shareholders' equity beginning balance at Dec. 31, 2021	418,777
Shareholders' equity beginning balance (in shares) at Dec. 31, 2021						50,785,656	84,294,971
Redeemable Non-controlling Interest at Dec. 31, 2021	841,982															$ 841,982
Equity based compensation	2,130											2,130
Net income (loss)	22,991												22,991			(5,259)
Redeemable Non-controlling Interest at Mar. 31, 2022																836,723
Accounting Standards Update [Extensible Enumeration]		us-gaap:AccountingStandardsUpdate201602Member												us-gaap:AccountingStandardsUpdate201602Member
Shareholders' equity ending balance at Mar. 31, 2022		$ 82												$ 82
Shareholder's equity ending balance at Mar. 31, 2022	443,980					$ 5	$ 8					468,475	(24,508)
Shareholders' equity ending balance (in shares) at Mar. 31, 2022						50,785,656	84,294,971
Shareholder's equity beginning balance at Dec. 31, 2021	418,777					$ 5	$ 8					466,345	(47,581)
Shareholders' equity beginning balance at Dec. 31, 2021	418,777
Shareholders' equity beginning balance (in shares) at Dec. 31, 2021						50,785,656	84,294,971
Redeemable Non-controlling Interest at Dec. 31, 2021	841,982															841,982
Net income (loss)	57,515		$ (1,331)
TRA liability on capital transactions	(5,000)
Redeemable Non-controlling Interest at Jun. 30, 2022	749,615															749,615
Foreign currency translation adjustment	(107)
Shareholders' equity ending balance at Jun. 30, 2022	564,085											556,417
Shareholder's equity ending balance at Jun. 30, 2022	564,085					$ 6	$ 7				$ (2,258)		9,913
Shareholders' equity ending balance (in shares) at Jun. 30, 2022						61,596,519	74,014,640
Shareholder's equity beginning balance at Mar. 31, 2022	443,980					$ 5	$ 8					468,475	(24,508)
Shareholders' equity beginning balance at Mar. 31, 2022		$ 82												$ 82
Shareholders' equity beginning balance (in shares) at Mar. 31, 2022						50,785,656	84,294,971
Redeemable Non-controlling Interest at Mar. 31, 2022																836,723
Equity based compensation	1,795											1,795
Net income (loss)	34,421		$ (1,185)										34,421			(442)
Vesting of restricted shares, net of tax witholding	(2,258)										(2,258)
Vesting of restricted shares net of tax witholding (in shares)						530,532
Exchange of common stock and Fathom Opco units						$ 1	$ (1)
Exchange of common stock and Fathom Opco units (in shares)						10,280,331	(10,280,331)
Non-controlling interest remeasurement	86,666											86,666				(86,666)
TRA liability on capital transactions	(5,000)											(5,000)
Tax impact of exchange of Class B common stock and Fathom Opco units	4,481											4,481
Redeemable Non-controlling Interest at Jun. 30, 2022	749,615															$ 749,615
Shareholders' equity ending balance at Jun. 30, 2022	564,085											$ 556,417
Shareholder's equity ending balance at Jun. 30, 2022	$ 564,085					$ 6	$ 7				$ (2,258)		$ 9,913
Shareholders' equity ending balance (in shares) at Jun. 30, 2022						61,596,519	74,014,640

Consolidated Statement of Sha_2

Consolidated Statement of Shareholders' Equity and Redeemable Non-Controlling Interest (Successor) and Class A Contingently Redeemable Preferred Units and Members' Equity (Predecessor) (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2022	Mar. 31, 2022
Class A Common Shares
Common stock, par value (in dollars per share)	$ 0.0001
Class B Common Shares
Common stock, par value (in dollars per share)	0.0001
Common Stock \| Class A Common Shares
Common stock, par value (in dollars per share)	0.0001	$ 0.0001
Common Stock \| Class B Common Shares
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities
Net income (loss)	$ 57,515	$ (4,582)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation	274	1,521
Depreciation and amortization included in cost of revenue	3,236	1,549
Amortization of intangible assets	8,694	4,555
Amortization of inventory step-up	3,241	277
(Gain) loss on disposal of property and equipment	(164)	79
Foreign currency translation adjustment	(107)	(105)
Gain on PPP forgiveness		(1,624)
Share-based compensation	3,925	31
Non cash lease expense, net	266
Deferred taxes	(734)
Bad debt expense		91
Non-controlling interest share of Fathom OpCo net Loss	(5,701)
Change in fair value of Fathom earnout shares liability	(36,610)
Change in fair value of Sponsor earnout shares liability	(5,290)
Change in fair value of Warrant liability	(20,600)
Change in fair value of contingent consideration	(148)	(1,355)
Change in fair value of TRA	(200)
Amortization of debt financing costs	230	616
Changes in operating assets and liabilities that (used) provided cash:
Accounts receivable	(1,430)	(8)
Inventory	(4,176)	(884)
Prepaid expenses and other assets	985	(150)
Accounts payable	(324)	635
Accrued liabilities and other	1,277	592
Net cash provided by operating activities	4,159	961
Cash Flows from Investing Activities
Purchase of property and equipment	(6,671)	(2,942)
Cash used for acquisitions, net of cash acquired		(67,428)
Net cash used in investing activities	(6,671)	(70,370)
Cash Flows from Financing Activities
Proceeds from debt		183,500
Payments on debt	(1,562)	(104,091)
Payments on finance leases	(157)
Tax payment for shares withheld in lieu of taxes	(2,258)
Loss on extinguishment of debt		2,031
Payment of debt issuance costs		(2,490)
Cash paid for contingent consideration	(2,750)	(2,984)
Net cash (used in) provided by financing activities	(6,727)	75,966
Net (decrease) increase in cash	(9,239)	6,557
Cash, beginning of period	20,357	8,188
Cash, end of period	11,118	14,745
Supplemental cash flows information:
Cash paid for interest	1,686	2,047
Cash paid for taxes		62
Cash paid to related parties	4,826	5,078
Initial recognition of contingent consideration for acquisitions		$ 1,295
Significant non-cash investing activities:
Right-of-use assets acquired through lease liabilities	$ 11,986

Nature of Business

Nature of Business	6 Months Ended
Nature of Business	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Note 1. Nature of Business Fathom Digital Manufacturing Corporation (“Fathom”, "Successor", or the “Company”) was incorporated as a Delaware corporation on December 23, 2021 as part of the business combination as defined below. Fathom was previously named Altimar Acquisition Corp. II ("Altimar II") before deregistering as an exempted company in the Cayman Islands. Fathom, through its consolidated subsidiary, Fathom Holdco, LLC (“Fathom OpCo”), is a leading on-demand digital manufacturing platform in North America, providing comprehensive product development and manufacturing services to many of the largest and most innovative companies in the world. Fathom OpCo was formed on April 16, 2021 as a limited liability company in accordance with the provisions of the Delaware Limited Liability Company Act, for the purpose of holding a 100 percent equity interest in MCT Group Holdings, LLC and its subsidiaries (“MCT Holdings”) and holding a 100 percent equity interest in Incodema Holdings, LLC and its subsidiaries (“Incodema Holdings”). Capitalized terms used but not otherwise defined herein have the meanings given to such terms in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2021 (the "2021 Form 10-K").

Basis of Presentation

Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Note 2. Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Fathom Digital Manufacturing Corporation and all majority-owned subsidiaries and entities in which a controlling interest is maintained. All significant intercompany transactions and balances have been eliminated in consolidation. The unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) and the rules and regulations of the Securities and Exchange Commission (“SEC”) applicable to interim reports. Accordingly, they do not include all the information and notes required by GAAP for complete financial statements and should be read in conjunction with the audited financial statements included in our 2021 Form 10-K. Our annual reporting period is the calendar year. In the Company’s opinion, the unaudited consolidated financial statements contain all adjustments, consisting of adjustments of a normal, recurring nature, necessary to present fairly the financial position, results of operations and cash flows for the periods presented. The results of operations for the three and six months ended June 30, 2022 are not necessarily indicative of the results to be expected for the full year. The preparation of financial statements in accordance with GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported in the financial statements. Actual results may differ from those estimates, judgments and assumptions. Amounts in the prior years' unaudited consolidated financial statements are reclassified whenever necessary to conform to the current year's presentation. The reclassifications had no impact on our results of operations, financial position, or cash flows for the Predecessor Periods. Recently Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842) Section A - Leases: Amendments to the FASB Accounting Standards Codification. The standard requires lessees to recognize the assets and liabilities arising from leases on the balance sheet and retains a distinction between finance leases and operating leases. The classification criteria for distinguishing between finance leases and operating leases are substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous lease guidance. The Company adopted this standard and related amendments in the first quarter of 2022, using the modified retrospective approach. Using the modified retrospective approach the Company determined an incremental borrowing rate at the date of adoption based on the total lease term and total minimum rental payments. The modified retrospective approach provides a method for recording existing leases at adoption with a cumulative adjustment to retained earnings. The Company elected the package of practical expedients which permits the Company to not reassess (1) whether any expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) any initial direct costs for any expired or existing leases as of the effective date. The Company also elected the practical expedient to use hindsight when determining the lease term, and the practical expedient lease considerations to not allocate lease considerations between lease and non-lease components for real estate leases. As such, real estate lease considerations are treated as a single lease-component and accounted for accordingly. The Company excludes leases with an initial term of 12 months or less from the application of Topic 842. Adoption of the new standard resulted in the recording of $ 3,122 and $ 8,195 of current lease liabilities and long-term lease liabilities, respectively, and $ 11,986 in corresponding right-of-use lease assets. The difference between the approximate value of the right-of-use lease assets and lease liabilities is attributable to future rent escalations. The cumulative change in the beginning accumulated deficit was $ 82 due to the adoption of Topic 842. There was no material impact on the Company’s consolidated statement of operations or consolidated statement of cash flows. The Company’s comparative periods continue to be presented and disclosed in accordance with legacy guidance in Topic 840.

Business Combination with Fatho

Business Combination with Fathom OpCo	6 Months Ended
Business Combination with Fathom OpCo	Jun. 30, 2022
Business Acquisition [Line Items]
Fathom OpCo Predecessor Period Acquisitions	Note 4 - Fathom OpCo Predecessor Period Acquisitions Acquisition of Summit Tooling, Inc., and Summit Plastics, LLC: Fathom OpCo completed an acquisition of Summit Tooling, Inc. ("Summit Tooling") and Summit Plastics, LLC (“Summit Plastics”), together with Summit Tooling, (“Summit”) on February 1, 2021 in which it acquired 100 percent of the equity interests of Summit. In conjunction with the equity purchase, Fathom OpCo acquired the real estate in which Summit performs their operations. Summit Tooling designs and manufactures plastic injection molds and Summit Plastics provides molding of precision plastic components for a variety of industries. The primary reason for the acquisition was to expand Fathom OpCo's capabilities in manufacturing and expand its customer base of high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting in accordance with Accounting Standards Codification ("ASC") 805 - Business Combinations and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 10,875 Fair value of total consideration transferred $ 10,875 The consideration excluded $ 892 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss. In addition, Fathom OpCo paid a transaction fee of $ 225 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired business into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Summit: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 40 Accounts receivable, net 627 Inventory 339 Property and equipment, net 4,371 Intangible assets 5,000 Total assets acquired 10,377 Accounts payable 40 Deferred revenue 776 Other current liabilities 1,418 Total liabilities assumed 2,234 Total identifiable net assets 8,143 Goodwill $ 2,732 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 400 5 Customer relationships 4,600 11 $ 5,000 The amounts of revenue and net loss of Summit since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period are as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,753 Net loss $ ( 1,367 ) Acquisition of Precision Process Corp.: Fathom OpCo completed an acquisition of Precision Process Corp. ("PPC") on April 30, 2021 in which it acquired 100 percent of the membership interest of PPC. In conjunction with the equity purchase, Fathom Opco acquired the real estate in which PPC performs their operations. PPC is a manufacturing company that offers integrated engineering-to-production services, specializing in making prototype, small-run and mass production of parts and components for medical, high-tech, automotive and metal stamping industries. The primary reason for the acquisition was to expand Fathom OpCo's capabilities into metal stamping with high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 25,721 Fair value of total consideration transferred $ 25,721 The consideration excludes $ 984 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss . Fathom OpCo paid a transaction fee of $ 264 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired business into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of PPC: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 162 Accounts receivable, net 899 Inventory 480 Fixed assets, net 2,413 Intangible assets 14,200 Total assets acquired 18,154 Accounts payable 148 Accrued expenses 79 Total liabilities assumed 227 Total identifiable net assets 17,927 Goodwill $ 7,794 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 1,100 5 Customer relationships 13,100 17 Total intangible assets $ 14,200 The amounts of revenue and net loss of PPC since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,837 Net loss $ ( 635 ) Acquisition of Centex Machine and Welding, Inc. and Laser Manufacturing, Inc.: Fathom OpCo completed acquisitions of Centex Machine and Welding, Inc. ("Centex") and Laser Manufacturing, Inc. ("Laser") on April 30, 2021 in which it acquired 100 percent of the equity interests of Centex and Laser. Centex is a top tier medical device manufacturing supplier and Laser provides high precision manufacturing services, combining state of the art technology with expert craftsmanship to deliver superior products. The acquisition was completed in order to expand Fathom OpCo's high-quality manufacturing and industrial technology capabilities in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Centex Laser Total Cash $ 11,774 $ 6,946 $ 18,720 Fair value of total consideration transferred $ 11,774 $ 6,946 $ 18,720 The consideration excluded $ 1,226 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss . Fathom OpCo also paid a transaction fee of $ 190 to an affiliate of the majority member of the Fathom OpCo in connection with the transaction. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired businesses into the Company’s existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Centex and Laser: Acquisition Date Fair Value Centex Laser Recognized amounts of identifiable assets acquired and liabilities assumed Cash $ - $ 68 Accounts receivable, net 1,775 900 Inventory 524 622 Prepaid expenses 108 1 Fixed assets, net 1,787 760 Intangible assets 6,243 3,557 Other assets 1 2 Total assets acquired 10,438 5,910 Accounts payable 252 568 Paycheck Protection Program (PPP) loan 649 - Accrued expenses 271 27 Other current liabilities 23 44 Other noncurrent liabilities 1,234 703 Total liabilities assumed 2,429 1,342 Total identifiable net assets 8,009 4,568 Goodwill $ 3,765 $ 2,378 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Estimated Life (Years) Trade name $ 510 5 Customer relationships 5,733 17 Total intangible assets $ 6,243 Acquisition Date Estimated Life (Years) Trade name $ 290 5 Customer relationships 3,267 17 Total intangible assets $ 3,557 The combined amounts of revenue and net loss of Centex and Laser since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period and is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,326 Net loss $ ( 1,240 ) Acquisition of Sureshot Precision, LLC: Fathom OpCo completed an acquisition of Sureshot Precision, LLC (d/b/a as "Micropulse West") on April 30, 2021 in which it acquired 100 percent of the membership interest of Micropulse West. Micropulse West is a full-service specialist offering a variety of services such as wire Electrical Discharge Machine (“EDM”), ram EDM, small hole EDM, computer numerical control ("CNC") and manual machining/turning, surface grinding, and inspection. The acquisition was consistent with the Fathom OpCo’s mission to acquire high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 12,452 Contingent consideration 1,295 Fair value of total consideration transferred $ 13,747 The consideration excludes $ 869 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss. In addition, Fathom OpCo paid a transaction fee of $ 130 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired businesses into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Micropulse West: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 70 Accounts receivable, net 866 Inventory 333 Other current assets 10 Fixed assets, net 2,490 Intangible assets 7,000 Total assets acquired 10,769 Accounts payable 139 Accrued expenses 13 Other current liabilities 99 Total liabilities assumed 251 Total identifiable net assets 10,518 Goodwill $ 3,229 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 600 5 Customer relationships 6,400 17 Total intangible assets $ 7,000 The amounts of revenue and net loss of Micropulse West since the acquisition date included in the 2021 Predecessor Period consolidated statement of comprehensive loss is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,134 Net loss $ ( 223 )
Fathom OpCo [Member]
Business Acquisition [Line Items]
Fathom OpCo Predecessor Period Acquisitions	Note 3. Business Combination with Fathom OpCo On December 23, 2021, Altimar II and Fathom OpCo closed a series of transactions (collectively, the "Business Combination") pursuant to the Business Combination Agreement dated as of July 15, 2021, as amended (the "Agreement"), that resulted in the combined Company becoming a publicly-traded company on the New York Stock Exchange ("NYSE") with the Company controlling Fathom OpCo in an "UP-C" structure. At the closing on December 23, 2021 ("Closing Date"), Altimar II domesticated into a Delaware corporation, and changed its name to Fathom Digital Manufacturing Corporation ("Fathom", the "Company", "we", or "our"). Following the closing, the former public investors in Altimar II, the investors that purchased Class A common stock in the private placement offering ("PIPE Investors") and the Founders collectively held Class A common stock representing approximately 10.4 % economic interest in Fathom OpCo, and the CORE Investors and the other Legacy Fathom Owners collectively held 89.6 % of economic interest in Fathom OpCo in the form of either Class A common stock or exchangeable Class A Units of Fathom OpCo. Additionally, the Company issued to the legacy Fathom owners shares of Class B common stock, which have no economic rights but entitle each holder to voting power ( one vote per share). Subsequently to the closing, the Company controls Fathom OpCo and is a holding company with no assets or operations other than its equity interest in Fathom OpCo. The Business Combination was accounted for using the acquisition method with the Company as the accounting acquirer. Under the acquisition method of accounting, the Company's assets and liabilities were recorded at carrying value, and the assets and liabilities associated with Fathom OpCo were recorded at estimated fair value as of the closing date. The excess of the purchase price over the estimated fair values of the net assets acquired was recognized as goodwill. For accounting purposes, the acquirer is the entity that has obtained control of another entity and, thus, consummated a business combination. The determination of whether control has been obtained begins with the evaluation of whether control should be evaluated based on the variable interest or the voting interest model. If the acquiree is a variable interest entity, the primary beneficiary would be the accounting acquirer. Fathom OpCo met the definition of a variable interest entity, and the Company was determined to the be the primary beneficiary and is therefore also the accounting acquirer in the Business Combination. As a result of the Business Combination, the Company's financial statement presentation distinguishes Fathom OpCo as the "Predecessor" through the Closing Date. ("2021 Predecessor Period" or "Predecessor Period"). The Company is the "Successor" ("2022 Successor Period" or "Successor Period") for periods after the Closing Date. As a result of the application of the acquisition method of accounting in the Successor Period, the unaudited consolidated financial statements for the Successor Period are presented on a full step-up basis, and are therefore not comparable to the unaudited consolidated financial statements of the Predecessor Period that are not presented on the same full step-up basis. In connection with the Business Combination, the Company incurred $ 19,010 of transaction expenses. These costs were recorded on the income statement of Altimar II prior to the Business Combination. Since the Predecessor period for purposes of these financial statements was deemed to be the historical results of Fathom OpCo, these transaction costs are not presented in the Company's consolidated statement of comprehensive income (loss) for the 2021 Predecessor Period. However, these transaction costs are reflected in the accumulated deficit balance of the Company in the consolidated balance sheet as of December 31, 2021 (Successor). The seller earnout contingent consideration below represents the estimated fair market value of the 9,000,000 Fathom Earnout Shares issued in conjunction with the Business Combination. The Fathom Earnout Shares will be settled with shares of Class A common stock or New Fathom Units and are accounted for as liability classified contingent consideration. The Fathom Earnout Shares vest in three equal tranches of 3,000,000 shares each at the volume-weighted average share price thresholds of $ 12.50 , $ 15.00 and $ 20.00 , respectively. The earnout period related to the Fathom Earnout Shares is five years from the Closing Date. These estimated fair values are preliminary and subject to adjustment in subsequent periods. In conjunction with the Business Combination, the Company recognized a deferred tax liability $ 17,573 . The deferred tax liability was recorded on the standalone books of the Company with an offset to goodwill. The deferred tax liability is included in the other noncurrent liabilities caption in the second table below. The Business Combination was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred was $ 1,364,220 . The following table sets forth the fair value of the assets and liabilities assumed in connection with the acquisition Total Assets acquired: Cash $ 9,577 Accounts receivable, net 24,712 Inventory 12,825 Prepaid expenses and other current assets 3,172 Property and equipment, net 44,397 Goodwill 1,189,762 Intangible assets 270,000 Other non-current assets 2,200 Total assets acquired 1,556,645 Liabilities assumed: Accounts payable 9,808 Accrued expenses 4,860 Other current liabilities 5,226 Current portion of debt 152,000 Other noncurrent liabilities 20,531 Total liabilities assumed 192,425 Net identifiable assets acquired $ 1,364,220 The following table illustrates a summary of the total consideration transferred. Total Consideration Transferred: Total cash consideration $ 53,332 Fathom earnout shares 88,160 Class A common stock transferred 375,478 Tax Receivable Agreement obligations to the sellers 4,300 Total consideration transferred to sellers 521,270 Non-controlling interest 842,950 Fair value of total consideration transferred $ 1,364,220 The purchase price allocation is preliminary and subject to change during the measurement period, which is not to exceed one year from the acquisition date. At this time, the Company does not expect material changes to the assets acquired or liabilities assumed. Goodwill represents future economic benefits arising from acquiring Fathom OpCo's equity, primarily due to its strong market position and its assembled workforce that are not individually and separately recognized as intangible assets. A portion of the Goodwill is deductible for tax purposes. Goodwill is allocated to the Company's sole reportable segment and reporting unit. Identifiable Intangible Assets Provisional fair value Provisional useful life (in years) Trade name $ 70,000 15 Customer relationships 180,000 19 Developed software 15,700 5 Developed technology 4,300 5 $ 270,000 The weighted average amortization period for the amortizable intangibles assets is 16.9 years.

Fathom OpCo Predecessor Period

Fathom OpCo Predecessor Period Acquisitions	6 Months Ended
Fathom OpCo Predecessor Period Acquisitions	Jun. 30, 2022
Business Combinations [Abstract]
Fathom OpCo Predecessor Period Acquisitions	Note 4 - Fathom OpCo Predecessor Period Acquisitions Acquisition of Summit Tooling, Inc., and Summit Plastics, LLC: Fathom OpCo completed an acquisition of Summit Tooling, Inc. ("Summit Tooling") and Summit Plastics, LLC (“Summit Plastics”), together with Summit Tooling, (“Summit”) on February 1, 2021 in which it acquired 100 percent of the equity interests of Summit. In conjunction with the equity purchase, Fathom OpCo acquired the real estate in which Summit performs their operations. Summit Tooling designs and manufactures plastic injection molds and Summit Plastics provides molding of precision plastic components for a variety of industries. The primary reason for the acquisition was to expand Fathom OpCo's capabilities in manufacturing and expand its customer base of high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting in accordance with Accounting Standards Codification ("ASC") 805 - Business Combinations and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 10,875 Fair value of total consideration transferred $ 10,875 The consideration excluded $ 892 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss. In addition, Fathom OpCo paid a transaction fee of $ 225 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired business into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Summit: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 40 Accounts receivable, net 627 Inventory 339 Property and equipment, net 4,371 Intangible assets 5,000 Total assets acquired 10,377 Accounts payable 40 Deferred revenue 776 Other current liabilities 1,418 Total liabilities assumed 2,234 Total identifiable net assets 8,143 Goodwill $ 2,732 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 400 5 Customer relationships 4,600 11 $ 5,000 The amounts of revenue and net loss of Summit since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period are as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,753 Net loss $ ( 1,367 ) Acquisition of Precision Process Corp.: Fathom OpCo completed an acquisition of Precision Process Corp. ("PPC") on April 30, 2021 in which it acquired 100 percent of the membership interest of PPC. In conjunction with the equity purchase, Fathom Opco acquired the real estate in which PPC performs their operations. PPC is a manufacturing company that offers integrated engineering-to-production services, specializing in making prototype, small-run and mass production of parts and components for medical, high-tech, automotive and metal stamping industries. The primary reason for the acquisition was to expand Fathom OpCo's capabilities into metal stamping with high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 25,721 Fair value of total consideration transferred $ 25,721 The consideration excludes $ 984 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss . Fathom OpCo paid a transaction fee of $ 264 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired business into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of PPC: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 162 Accounts receivable, net 899 Inventory 480 Fixed assets, net 2,413 Intangible assets 14,200 Total assets acquired 18,154 Accounts payable 148 Accrued expenses 79 Total liabilities assumed 227 Total identifiable net assets 17,927 Goodwill $ 7,794 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 1,100 5 Customer relationships 13,100 17 Total intangible assets $ 14,200 The amounts of revenue and net loss of PPC since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,837 Net loss $ ( 635 ) Acquisition of Centex Machine and Welding, Inc. and Laser Manufacturing, Inc.: Fathom OpCo completed acquisitions of Centex Machine and Welding, Inc. ("Centex") and Laser Manufacturing, Inc. ("Laser") on April 30, 2021 in which it acquired 100 percent of the equity interests of Centex and Laser. Centex is a top tier medical device manufacturing supplier and Laser provides high precision manufacturing services, combining state of the art technology with expert craftsmanship to deliver superior products. The acquisition was completed in order to expand Fathom OpCo's high-quality manufacturing and industrial technology capabilities in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Centex Laser Total Cash $ 11,774 $ 6,946 $ 18,720 Fair value of total consideration transferred $ 11,774 $ 6,946 $ 18,720 The consideration excluded $ 1,226 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss . Fathom OpCo also paid a transaction fee of $ 190 to an affiliate of the majority member of the Fathom OpCo in connection with the transaction. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired businesses into the Company’s existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Centex and Laser: Acquisition Date Fair Value Centex Laser Recognized amounts of identifiable assets acquired and liabilities assumed Cash $ - $ 68 Accounts receivable, net 1,775 900 Inventory 524 622 Prepaid expenses 108 1 Fixed assets, net 1,787 760 Intangible assets 6,243 3,557 Other assets 1 2 Total assets acquired 10,438 5,910 Accounts payable 252 568 Paycheck Protection Program (PPP) loan 649 - Accrued expenses 271 27 Other current liabilities 23 44 Other noncurrent liabilities 1,234 703 Total liabilities assumed 2,429 1,342 Total identifiable net assets 8,009 4,568 Goodwill $ 3,765 $ 2,378 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Estimated Life (Years) Trade name $ 510 5 Customer relationships 5,733 17 Total intangible assets $ 6,243 Acquisition Date Estimated Life (Years) Trade name $ 290 5 Customer relationships 3,267 17 Total intangible assets $ 3,557 The combined amounts of revenue and net loss of Centex and Laser since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period and is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,326 Net loss $ ( 1,240 ) Acquisition of Sureshot Precision, LLC: Fathom OpCo completed an acquisition of Sureshot Precision, LLC (d/b/a as "Micropulse West") on April 30, 2021 in which it acquired 100 percent of the membership interest of Micropulse West. Micropulse West is a full-service specialist offering a variety of services such as wire Electrical Discharge Machine (“EDM”), ram EDM, small hole EDM, computer numerical control ("CNC") and manual machining/turning, surface grinding, and inspection. The acquisition was consistent with the Fathom OpCo’s mission to acquire high-quality manufacturing and industrial technology companies in North America. The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 12,452 Contingent consideration 1,295 Fair value of total consideration transferred $ 13,747 The consideration excludes $ 869 of buyer transaction expenses that are included in other expenses within the 2021 consolidated statement of comprehensive loss. In addition, Fathom OpCo paid a transaction fee of $ 130 to an affiliate of the majority member of Fathom OpCo. The goodwill recognized as part of the acquisition primarily reflects the value of the assembled workforce acquired and the value of future growth prospects and expected business synergies realized as a result of combining and integrating the acquired businesses into Fathom OpCo's existing platform. The goodwill recognized is partially deductible for tax purposes. The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Micropulse West: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 70 Accounts receivable, net 866 Inventory 333 Other current assets 10 Fixed assets, net 2,490 Intangible assets 7,000 Total assets acquired 10,769 Accounts payable 139 Accrued expenses 13 Other current liabilities 99 Total liabilities assumed 251 Total identifiable net assets 10,518 Goodwill $ 3,229 Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 600 5 Customer relationships 6,400 17 Total intangible assets $ 7,000 The amounts of revenue and net loss of Micropulse West since the acquisition date included in the 2021 Predecessor Period consolidated statement of comprehensive loss is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,134 Net loss $ ( 223 )

Revenue

Revenue	6 Months Ended
Revenue	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Revenue	Note 5. Revenue The Company accounts for revenue in accordance with ASC 606 . Revenue is recognized in five steps. The Company identifies the contract with the customer, identifies the performance obligations in the contract, determines the transaction price, allocates the transaction price to the performance obligations, and recognizes revenue when (or as) each performance obligation is satisfied. Collectability is a required component of a valid contract. The Company assesses collectability based on a number of factors, including the customer’s past payment history and current creditworthiness. If collectability is not considered probable at inception, the Company will not have a valid contract. Most of the Company’s revenue has one performance obligation and is recognized on a point-in-time basis upon shipment. The majority of the Company’s injection molding contracts have multiple performance obligations including one obligation to produce the mold and sample part and a second obligation to produce production parts. For injection molding contracts with multiple performance obligations, the Company allocates revenue to each performance obligation based on its relative standalone selling price and recognizes revenue for each performance obligation on a point-in-time basis upon shipment. We generally determine stand-alone selling price based on the price charged to customers. The Company’s payments terms are consistent with industry standards and never exceed 12 months. Revenue by product line for the three and six months ended June 30, 2022 and June 30, 2021 are as follows: Three Months Ended Six Months Ended June 30, 2022 (Successor) June 30, 2021 (Predecessor) June 30, 2022 (Successor) June 30, 2021 (Predecessor) Revenue: Additive Manufacturing $ 4,410 $ 4,302 $ 8,559 $ 8,842 Injection Molding 7,093 6,492 13,908 13,129 CNC Machining 14,584 11,072 27,910 15,903 Precision Sheet Metal 14,751 12,093 29,434 25,210 Ancillary Product Lines 1,147 1,913 2,715 3,322 Total revenue $ 41,985 $ 35,872 $ 82,526 $ 66,406

Inventories

Inventories	6 Months Ended
Inventories	Jun. 30, 2022
Inventory Disclosure [Abstract]
Inventories	Note 6. Inventories Inventories are estimated at the lower of cost or net realizable value (“NRV”), with NRV based on selling prices in the ordinary course of business, less costs of completion, disposal, and transportation. Costs are determined on the first-in, first-out (“FIFO”) method. Inventories consisted of the following: Period Ended June 30, December 31, Raw materials $ 3,875 $ 4,967 Work in process 8,648 5,368 Finished goods 1,710 3,506 Tooling 636 605 14,869 14,446 Allowance for obsolescence ( 769 ) ( 1,281 ) Total $ 14,100 $ 13,165

Property and Equipment

Property and Equipment	6 Months Ended
Property and Equipment	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Property and Equipment	Note 7. Property and Equipment Property and equipment, net, consisted of the following: Period Ended June 30, 2022 December 31, 2021 Machinery and equipment $ 34,461 $ 33,182 Furniture and fixtures 165 180 Computer equipment 373 804 Property and leasehold improvements 6,942 7,180 Construction in progress 7,835 2,859 Transportation equipment 329 454 Total 50,105 44,659 Accumulated depreciation and amortization ( 3,197 ) ( 132 ) Total $ 46,908 $ 44,527 Depr eciation expense included in operating expenses for the three months ended June 30, 2022 and June 30, 2021 was $ 138 and $ 1,405 , respectively, and $ 274 and $ 1,521 for the six months ended June 30, 2022 and June 30, 2021, respectively. Depreciation expense included in cost of revenues for the three months ended June 30, 2022 and June 30, 2021 was $ 1,326 and $ 924 , respectively, and $ 2,791 and $ 1,099 for the six months ended June 30, 2022 and June 30, 2021, respectively.

Goodwill and Intangible Assets,

Goodwill and Intangible Assets, Net	6 Months Ended
Goodwill and Intangible Assets, Net	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, net	Note 8. Goodwill and Intangible Assets, net A rollforward of goodwill is as follows: Balance at December 31, 2021 $ 1,189,464 Measurement period adjustments ( 1,023 ) Balance at June 30, 2022 $ 1,188,441 Intangible assets, net consisted of the following: June 30, 2022 December 31, 2021 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Trade name $ 70,000 $ 2,448 $ 67,552 $ 70,000 $ 98 $ 69,902 Customer relationships 180,000 4,971 175,029 180,000 252 179,748 Developed software 15,700 1,647 14,053 15,700 22 15,678 Developed technology 4,300 451 3,849 4,300 6 4,294 Total intangible assets $ 270,000 $ 9,517 $ 260,483 $ 270,000 $ 378 $ 269,622 Aggregate amortization expense related to intangible assets, excluding goodwill which is not amortized, was $ 4,535 and $ 2,704 for the three months ended June 30, 2022 and June 30, 2021, respectively, and $ 9,139 and $ 5,005 for the six months ended June 30, 2022 and June 30, 2021, respectively. There are no intangible assets, other than goodwill, with indefinite useful lives . The following table represents the estimated aggregate amortization expense for each of the five succeeding fiscal calendar years. Year Aggregate Amortization Remaining 2022 $ 9,070 2023 18,140 2024 18,140 2025 18,140 2026 18,041

Warrant Liability

Warrant Liability	6 Months Ended
Warrant Liability	Jun. 30, 2022
Warrants and Rights Note Disclosure [Abstract]
Warrant Liability	Note 9. Warrant Liability As of June 30, 2022, the Company had 8,625,000 Public Warrants outstanding with a fair value price o f $ 0.39 per Public Warrant, and 9,900,000 Private Placement Warrants outstanding with a fair value price of $ 1.01 per Private Placement Warrant. Each reporting period the public and private warrants are fair valued with the change in the fair value being recognized in the Statement of Comprehensive Income (Loss). The change in the fair value for the three and six months ended June 30, 2022 was $ 12,500 and $ 20,600 , respectively, and is recognized in Other income. The below table summarizes the number of outstanding warrants and the fair value as of June 30, 2022 and December 31, 2021. June 30, 2022 December 31, 2021 Fair Value # of Warrants Fair Value # of Warrants Public Warrants $ 3,300 8,625,000 $ 7,600 8,625,000 Private Placement Warrants 10,000 9,900,000 26,300 9,900,000 Total Warrant Liability $ 13,300 $ 33,900

Debt

Debt	6 Months Ended
Debt	Jun. 30, 2022
Debt Disclosure [Abstract]
Debt	Note 10. Debt On December 23, 2021, Fathom OpCo entered into the New Credit Agreement, which included a $ 50,000 revolving credit facility and $ 125,000 term loan. The Company's borrowings under the revolving credit agreement wer e $ 27,000 at June 30, 2022. The loans made under the New Credit Agreement will mature in December 2026 . The Company recorded deferred financing costs of $ 1,828 in conjunction with the New Credit Agreement and the balance is presented net within Long-term debt, net on the Company's consolidated balance sheet. The Company amortizes the deferred financing costs using the effective interest method. The revolving credit facility under the New Credit Agreement is available for working capital and other general corporate purposes and includes a letter of credit sub-facility of up to $ 5,000 . The New Credit Agreement also includes an uncommitted incremental facility, which, subject to certain conditions, provides for additional term loan facilities, an increase in commitments under the New Credit Agreement and/or an increase in commitments under the revolving credit facility, in an aggregate amount of up to $ 100,000 . The Company is subject to various financial covenants, including quarterly net leverage and interest coverage covenants. The Company is in compliance with all debt covenants related to the New Credit Agreement as of June 30, 2022. The Company’s debt as of June 30, 2022 and December 31, 2021 is as follows: As of June 30, 2022 As of December 31, 2021 Debt Description Interest Rate Amount Interest Rate Amount New Credit Agreement Revolver 5.41 % $ 27,000 3.60 % $ 27,000 New Credit Agreement Term Loan 5.75 % 123,438 3.72 % 125,000 Total principal long-term debt 150,438 152,000 Debt issuance costs ( 1,582 ) ( 1,812 ) Total debt, net 148,856 150,188 Less: current portion of debt 31,179 29,697 Long-term debt, net of current portion $ 117,677 $ 120,491 Interest on all debt is payable in 90 day increments, with the unpaid amount due upon maturity. Interest expense associated with long-term debt for the three months ended June 30, 2022 and June 30, 2021 was $ 1,843 and $ 1,632 , respectively, and $ 3,316 and $ 3,746 for the six months ended June 30, 2022 and June 30, 2021, respectively. Included in interest expense, net on the accompanying unaudited consolidated statements of comprehensive loss is amortization of debt issuance costs for the three months ended June 30, 2022 and June 30, 2021 of $ 130 , and $ 520 , respectively, and $ 230 and $ 616 for the six months ended June 30, 2022 and June 30, 2021, respectively. In December 2021, Fathom OpCo entered into a financing agreement through its insurance broker to spread the payment of its annual director’s and officer’s insurance premium over a ten-month period. Total financed payments of $ 3,001 , including a $ 35 financing fee at a 2.57 % annual rate, are to be made between January 2022 and October 2022. As of June 30, 2022 the Company recognized $ 1,345 of prepaid assets and $ 1,179 of other current liabilities in the unaudited consolidated financial statements. For the three months and six months ended June 30, 2022 the Company recognized $ 842 and $ 1,684 of insurance expense in selling, general and administrative ("SG&A") expenses, respectively.

Other (Income) Expense

Other (Income) Expense	6 Months Ended
Other (Income) Expense	Jun. 30, 2022
Other Income and Expenses [Abstract]
Other (Income) Expense	Note 11. Other (Income) Expense Other income and expense, net for the three and six months ended June 30, 2022 and June 30, 2021 are as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Acquisition expenses $ - $ 2,706 $ - $ 4,045 Change in fair value of TRA - $ - - $ - Loss on sale of assets - - 24 - Loss on debt extinguishment - 2,031 - 2,031 Loan prepayment fees - 1,463 - 1,463 Other 129 910 171 1,111 Other expense 129 7,110 195 8,650 Change in fair value of Fathom and Sponsor Earnout Shares ( 22,930 ) - ( 41,900 ) - Change in fair value of Warrants ( 12,500 ) - ( 20,600 ) - Change in fair value of TRA ( 200 ) - ( 200 ) - Gain on PPP forgiveness - ( 1,624 ) - ( 1,624 ) Gain on fair value of contingent consideration ( 148 ) ( 1,355 ) ( 148 ) ( 1,355 ) Gain on sale of assets ( 188 ) - ( 188 ) - Other ( 142 ) ( 227 ) ( 187 ) ( 321 ) Other income ( 36,108 ) ( 3,206 ) ( 63,223 ) ( 3,300 ) Other (income) expense, net $ ( 35,979 ) $ 3,904 $ ( 63,028 ) $ 5,350

Shared Based Compensation

Shared Based Compensation	6 Months Ended
Shared Based Compensation	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Shared Based Compensation	Note 12. Shared Based Compensation On December 23, 2021, the Company executed the Fathom Digital Manufacturing 2021 Omnibus Incentive Plan (the "2021 Omnibus Plan") to encourage the profitability and growth of the Company through short-term and long-term incentives that are consistent with the Company's objectives. The 2021 Omnibus Plan provides that the Company may grant options, stock appreciation rights, restricted shares, restricted stock units, performance-based awards (including performance-based restricted shares and restricted stock units), other share-based awards, other cash-based awards, and any combination of the foregoing. Share Based Compensation Expense Share based compensation was $ 1,795 and $ 31 for the three months ended June 30, 2022 and June 30, 2021, respectively, and $ 3,925 and $ 31 for the six months ended June 30, 2022 and June 30, 2021, respectively. Stock Options In February 2022, the Company granted stock options to purchase up to 317,091 shares of Class A common stock at a weighted average exercise price of $ 8.71 per share which generally vest over a requisite service period of three years . The total intrinsic value of options exercised during the three and six months ended June 30, 2022 wa s $ 0 . The following table summarizes provides the assumptions used in the Black-Scholes model valuation of stock options for the six months ended June 30 2022: June 30, 2022 Expected term (years) 4.5 Expected volatility 58.7 % Expected dividend yield 0.0 % Risk-free interest rate 1.91 % Fair value of share $ 4.26 At June 30, 2022, there was approximately $ 1,200 of total unrecognized compensation cost related to unvested stock options granted under the 2021 Omnibus Plan. That cost is expected to be recognized over a weighted average perio d of 2.67 years as of June 30, 2022. The Company currently uses authorized and unissued shares to satisfy share award exercises. Restricted Stock Units and Restricted Stock Restricted stock unit awards are share-settled awards and restrictions lapse ratably over the vesting period, which is generally a period of one to three years . subject to the employee's continuing service to the Company. Restricted stock awards are awards of shares subject to vesting and any other conditions specified in the related award agreements. A summary of the status of the Company's restricted stock unit and restricted stock award activity and the changes during the six months ended June 30, 2022 are as follows: Shares Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested at December 31, 2021 1,468,392 $ 10.00 $ - Granted 871,430 8.73 - Vested ( 822,606 ) 10.00 - Forfeited ( 4,035 ) 8.72 - Non-vested at June 30, 2022 1,513,181 $ 8.09 $ - At June 30, 2022, there was approximately $ 8,471 of total unrecognized compensation cost related to unvested restricted stock units granted under the 2021 Omnibus Plan. That cost is expected to be recognized over a weighted average period o f 2.64 year s.

Earnings Per Share and Earnings

Earnings Per Share and Earnings Per Unit	6 Months Ended
Earnings Per Share and Earnings Per Unit	Jun. 30, 2022
Earnings Per Unit [Abstract]
Earnings Per Share and Earnings Per Unit	Note 13. Earnings Per Share and Earnings Per Unit 2022 Successor Basic net income per share is computed based on the weighted average number of common shares outstanding. Diluted net income per share is computed based on the weighted average number of common shares outstanding, increased by the number of any additional shares that would have been outstanding had any potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Only the Company's Class A common stock participates in the Company’s undistributed earnings. As such, the Company’s undistributed earnings are allocated entirely to shares of Class A common stock based on the weighted-average number of shares of Class A common stock outstanding the three and six months ending June 30, 2022. The Company's basic earnings per share calculation is as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Class A Class A Basic Earnings Per Share: Numerator Net income $ 33,979 $ 51,813 Less: Net loss attributable to non-controlling interests ( 442 ) ( 5,702 ) Net income attributable to Class A common stock $ 34,421 $ 57,515 Denominator Weighted average shares of Class A common stock outstanding-basic 52,259,885 51,530,961 Basic Earnings Per Share $ 0.66 $ 1.12 The Company's diluted earnings per share calculation is as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Class A Class A Diluted Earnings Per Share: Numerator Net income attributable to holders of Class A common stock $ 34,421 $ 57,515 Denominator Weighted average shares of Class A common stock outstanding-basic 52,259,885 51,530,961 Effect of Dilutive Securities Assumed exchange for shares of Class A common stock 83,264,888 83,774,207 Weighted average shares of Class A common stock outstanding-diluted 135,524,773 135,305,168 Diluted Earnings Per Share $ 0.25 $ 0.43 2021 Predecessor Basic net loss per unit is computed based on the weighted average number of common units outstanding. Diluted net loss per unit is computed based on the weighted average number of common units outstanding, increased by the number of any additional units that would have been outstanding had any potentially dilutive common units been issued and reduced by the number of units Fathom OpCo could have repurchased from the proceeds from issuance of the potentially dilutive units. Fathom OpCo had no dilutive instruments outstanding as of June 30, 2021. As a result, basic and diluted earnings per units are the same as of June 30, 2021. In the Predecessor Period, Fathom OpCo's Class A common units and Class B common units participated equally in Fathom OpCo's undistributed earnings. As such, Fathom OpCo’s undistributed earnings were allocated pro-rata to the Class A common units and Class B common units based on the weighted-average number of Class A common units and Class B common units outstanding as of June 30, 2021 such that earnings per unit for Class A common units and Class B common units are the same in each period. Period From April 1 - June 30, April 1 - June 30, Class A Class B Basic and Diluted Loss Per Unit: Numerator Net loss $ ( 2,897 ) $ ( 1,185 ) Less: annual dividends on redeemable preferred units ( 5,574 ) ( 2,282 ) Net loss attributable to common unitholders ( 8,471 ) ( 3,467 ) Denominator Weighted-average units used to compute basic earnings per unit 5,480,611 2,242,981 Basic and Diluted Loss Per Unit $ ( 1.55 ) $ ( 1.55 ) Period From January 1 - June 30, January 1 - June 30, Class A Class B Basic and Diluted Loss Per Unit: Numerator Net loss $ ( 3,251 ) $ ( 1,331 ) Less: annual dividends on redeemable preferred units ( 7,188 ) ( 2,942 ) Net loss attributable to common unitholders ( 10,439 ) ( 4,273 ) Denominator Weighted-average units used to compute basic earnings per unit 5,480,611 2,242,981 Basic and Diluted Loss Per Unit $ ( 1.90 ) $ ( 1.90 )

Shareholders' Equity, Noncontro

Shareholders' Equity, Noncontrolling interest, and Members' Equity	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Shareholders' Equity, Noncontrolling interest, and Members' Equity	Note 14. Shareholders' Equity, Noncontrolling interest, and Members' Equity Successor The Company’s equity consists of a total of 500,000,000 authorized shares across all classes of capital stock, which the Company has the authority to issue. The 500,000,000 authorized shares consist of 10,000,000 authorized shares of preferred stock with a par value of $ 0.0001 per share, 300,000,000 authorized shares of Class A common stock with a par value of $ 0.0001 per share, 180,000,000 shares of Class B common stock with a par value of $ 0.0001 par value per share, and 10,000,000 shares of Class C common stock with a par value of $ 0.0001 per share. During the second quarter of 2022, the Company' shareholders exchanged 10,280,331 of Fathom OpCo's exchangeable Class A Units (and the associated vote-only Class B shares) for an equal number of Class A shares. As a result of the exchange, the Company reallocated equity from noncontrolling interests to the Company's additional paid-in-capital and recorded additional deferred tax assets and TRA liability in connection with the exchanges. See the consolidated statement of shareholders' equity and redeemable non-controlling interest for these amounts. As of June 30, 2022, the Company had no outstanding shares of Preferred Stock, 61,596,519 outstanding shares of Class A common stock, 74,014,640 outstanding shares of Class B common stock, and no outstanding shares of Class C common stock. The table below demonstrates the calcul ation of the comprehensive loss attributable to the non-controlling interest holders for the 2022 Successor Period. Period From April 1, 2022 - June 30, 2022 Period From January 1, 2022 - June 30, 2022 Fathom OpCo comprehensive loss $ ( 808 ) $ ( 9,884 ) Non-controlling interest percentage 54.8 % 54.8 % Comprehensive loss attributable to non-controlling interest $ ( 442 ) $ ( 5,702 ) Predecessor Fathom OpCo's equity in the 2021 Predecessor Period consists of Class A common units and Class B common units. The following table represents a summary of the Company’s Members' Equity as of June 30, 2021 (Predecessor): June 30, 2021 Class A common units 5,480,611 Class B common units 2,242,981

Leases

Leases	6 Months Ended
Leases	Jun. 30, 2022
Lessee Disclosure [Abstract]
Leases	Note 15. Leases The Company leases certain manufacturing facilities, office space, and equipment and determines if an arrangement is a lease at inception. Amounts associated with operating leases and financing leases are included in right-of-use lease assets (“ROU assets”), current lease liabilities and long-term lease liabilities in the Company's unaudited consolidated balance sheet. ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. ROU assets and liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. If the leases do not provide an implicit rate, the Company uses an incremental borrowing rate based on the information available at the lease commencement date in determining the present value of lease payments. The incremental borrowing rate is determined using a portfolio approach based on the rate of interest that we would pay to borrow an amount equal to the lease payments on a collateralized basis over a similar term. The Company uses quoted interest rates obtained from financial institutions as an input to derive its incremental borrowing rate as the discount rate for the lease. Leases with an initial term of 12 months or less are not recorded on the balance sheet, and we recognize lease expense for these leases on a straight-line basis over the lease term. For lease agreements entered into or reassessed after the adoption of Topic 842, we combine lease and nonlease components. Certain leases include one or more options to renew, with renewal terms that can extend the lease term from one to 10 years or more, and the exercise of lease renewal options under these leases is at our sole discretion. Lease terms include the non-cancellable portion of the underlying leases along with any reasonably certain lease periods associated with available renewal periods. Certain of the Company’s operating leases include variable rental payments based on a percentage change of certain consumer price indices ("CPI"). Variable rental payments are recognized in the consolidated statement of comprehensive income (loss) in the period in which the obligation for those payments is incurred. The depreciable life of assets and leasehold improvements are limited by the expected lease term. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. Balance Sheet Location June 30, 2022 Assets Operating Right-of-use operating lease assets, net $ 8,081 Financing Right-of-use financing lease assets, net 2,363 Total lease assets $ 10,444 Liabilities Current Operating Current operating lease liability $ 2,976 Financing Current financing lease liability 190 Non-Current Operating Long-term operating lease liability 5,160 Financing Long-term financing lease liability 2,227 Total lease liability $ 10,553 The following table sets forth our lease costs included in our unaudited consolidated statement of comprehensive income (loss): Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Operating lease cost $ 817 $ 1,620 Short-term lease cost 4 8 Financing lease cost: Amortization of ROU assets 54 108 Interest on lease liabilities 34 69 Sublease income ( 34 ) ( 68 ) Total lease costs $ 875 $ 1,737 June 30, 2022 Weighted-average remaining lease term (years) Operating 3.6 Financing 8.6 Weighted-average discount rate Operating 4.2 % Financing 5.6 % Maturities of Leases Operating Leases Financing Leases Total Remainder of 2022 $ 1,802 $ 159 $ 1,961 2023 2,951 325 3,276 2024 1,780 335 2,115 2025 1,126 345 1,471 2026 638 356 994 Thereafter 693 1,566 2,259 Total future lease payments 8,990 3,086 12,076 Less: Discount 854 669 1,523 Present value of lease liability $ 8,136 $ 2,417 $ 10,553 Disclosures related to period prior to adoption of the Topic 842 Operating lease rent expense was $ 890 for the three months ended June 30, 2021, and $ 1,657 for the six months ended June 30, 2021. As of December 31, 2021, future minimum lease payment obligations were as follows: Year Total 2022 $ 3,212 2023 3,027 2024 1,959 2025 1,253 2026 443 Thereafter 328 Total future lease payments $ 10,222

Tax Receivable Agreement

Tax Receivable Agreement	6 Months Ended
Tax Receivable Agreement	Jun. 30, 2022
Tax Receivable Agreement Abstract
Tax Receivable Agreement	Note 16. Tax Receivable Agreement In connection with the Business Combination, Fathom entered into a Tax Receivable Agreement ("TRA") with certain owners of Fathom OpCo prior to the Business Combination. Pursuant to the TRA, the Company will pay certain of these parties, as applicable, 85 % of the tax benefits, of any savings the company realize, calculated using certain assumptions, as a result of (i) tax basis adjustments from sales and exchanges of Fathom OpCo's equity interests in connection with or following the Business Combination and certain distributions with respect to Fathom OpCo's equity interests, (ii) our utilization of certain tax attributes, and (iii) certain other tax benefits related to entering into the TRA. Actual tax benefits realized by Fathom may differ from tax benefits calculated under the TRA as a result of the use of certain assumptions in the TRA, including the use of an assumed weighted-average state and local income tax rate to calculate tax benefits. While the amount of existing tax basis, the anticipated tax basis adjustments and the actual amount and utilization of tax attributes, as well as the amount and timing of any payments under the TRA, will vary depending upon a number of factors, we expect that the payments that Fathom may make under the TRA will be substantial. The Company’s TRA liability established upon completion of the Business Combination is measured at fair value on a recurring basis using significant unobservable inputs (Level 3). The TRA liability balance at June 30, 2022 assumes: (i) a constant blended U.S. federal, state and local income tax rate of 26.9 %; (ii) no material changes in tax law; (iii) the ability to utilize tax attributes based on current alternative tax forecasts; and (iv) future payments under the TRA are made when due under the TRA. The amount of the expected future payments under the TRA has been discounted to its present value using a discount rate of 12.2 %. Subsequent to the Business Combination, the Company will record additional liabilities under the TRA when Class A Units of Fathom OpCo are exchanged for Class A common stock. Liabilities resulting from these exchanges will be recorded on a gross undiscounted basis and are not remeasured at fair value. During the Successor six months ended June 30, 2022, an additional TRA liability of $ 5,000 was established as a result of these exchanges. The following table summarizes the changes in the TRA liabilities: Tax Receivable Agreement Liability Beginning balance as of December 31, 2021 $ 4,600 Fair value measurement ( 200 ) Conversion of non-controlling interest 5,000 Ending Balance as of June 30, 2022 9,400 Less: Current portion included in other current liabilities - Total long-term tax receivable agreement liability $ 9,400

Fair Value Measurement

Fair Value Measurement	6 Months Ended
Fair Value Measurement	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurement	Note 17. Fair Value Measurement The fair value of the Company’s financial assets and liabilities reflects our management’s estimate of amounts that the Company would have received in connection with the sale of the assets or paid in connection with the transfer of the liabilities in an orderly transaction between market participants at the measurement date. In connection with measuring the fair value of its assets and liabilities, the Company seeks to maximize the use of observable inputs (market data obtained from independent sources) and to minimize the use of unobservable inputs (internal assumptions about how market participants would price assets and liabilities). The following fair value hierarchy is used to classify assets and liabilities based on the observable inputs and unobservable inputs used in order to value the assets and liabilities: Level 1 — Quoted prices in active markets for identical assets or liabilities. An active market for an asset or liability is a market in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 — Observable inputs other than Level 1 inputs. Examples of Level 2 inputs include quoted prices in active markets for similar assets or liabilities and quoted prices for identical assets or liabilities in markets that are not active. Level 3 — Unobservable inputs based on our assessment of the assumptions that market participants would use in pricing the asset or liability. The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of June 30, 2022. Fair Value Measurements as of June 30, 2022 Description Level 1 Level 2 Level 3 Total Liabilities: Tax Receivable Agreement $ - $ - $ 4,400 $ 4,400 Fathom OpCo acquisitions contingent consideration - - 700 700 Sponsor Earnout Shares Liability - - 4,090 4,090 Fathom Earnout Shares Liability - - 27,690 27,690 Warrant liability – Public Warrants 3,300 - - 3,300 Warrant liability – Private Placement Warrants - - 10,000 10,000 $ 3,300 $ - $ 46,880 $ 50,180 The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of December 31, 2021. Fair Value Measurements as of December 31, 2021 Description Level 1 Level 2 Level 3 Total Liabilities: Tax Receivable Agreement $ - $ - $ 4,600 $ 4,600 Fathom OpCo acquisitions contingent consideration - - 3,598 3,598 Sponsor Earnout Shares Liability - - 9,380 9,380 Fathom Earnout Shares Liability - - 64,300 64,300 Warrant liability – Public Warrants 7,600 - - 7,600 Warrant liability – Private Placement Warrants - - 26,300 26,300 $ 7,600 $ - $ 108,178 $ 115,778 The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements. Level 3 Liabilities Tax Receivable Agreement liability Fathom OpCo acquisitions contingent consideration Sponsor Earnout shares liability Fathom Earnout shares liability Warrant liability – Private Placement Warrants Total Balance at December 31, 2021 $ 4,600 $ 3,598 $ 9,380 $ 64,300 $ 26,300 $ 108,178 Payments - ( 2,750 ) - - - $ ( 2,750 ) Net (gain) loss (1) ( 200 ) ( 148 ) ( 5,290 ) ( 36,610 ) ( 16,300 ) $ ( 58,548 ) Ending balance at June 30, 2022 $ 4,400 $ 700 $ 4,090 $ 27,690 $ 10,000 $ 46,880 (1) Net gains on changes in recurring level 3 fair value measurements are recognized in Other income and net losses on change in recurring level 3 fair value measurements are recognized in other expense in our unaudited consolidated statement of comprehensive loss. Valuation Methodologies for Fair Value Measurements Categorized within Levels 2 and 3 Tax Receivable Agreement The fair value of the TRA is based on multiple inputs and assumptions input into a Monte Carlo simulation model. The significant inputs into this model are the following: a corporate tax rate of 26.9 %, an annual TRA payment date of February 16, existing non-controlling interest percentage of 54.8 %, initial amortization deductions of $ 52,400 , $ 126,000 of taxable income forecast by 2030, a sell-down schedule which reflects the expected sale of our Class A common units in Fathom OpCo ("New Fathom Units") by legacy Fathom OpCo shareholders, a Class A common stock price as of June 30, 2022 (Successor) of $ 3.88 , volatility of 96.8 %, correlation between taxable income and the Class A common stock price of 25 %, and a cost of debt range from 8.1 % to 10.6 % Legacy Fathom OpCo Acquisitions Contingent Consideration The fair values for contingent consideration payable are determined by using a discounted cash flow approach with unobservable inputs and is classified as a Level 3 liability in the fair value hierarchy. The Company’s assessment of the significance of particular inputs to these fair value measurements requires judgment and considers factors specific to each entity to which the contingent consideration relates to, for example EBITDA targets for a given period. Earnout Shares Liability The fair values for the Earnout Shares are estimated using a Monte Carlo simulation assuming Geometric Brownian Motion in a risk-neutral framework. The Monte Carlo simulation considers daily simulated stock prices as a proxy for the Company's daily volume-weighted average price ("VWAP"). The key inputs into the valuation of the Earnout Shares are an expected term of five years , a risk-free rate of 3.0 %, operating asset volatility of 93.3 %, and equity volatility of 101.5 %. The operating asset volatility and the equity volatility assumptions are based on a blended average of operating and equity volatility, respectively, of publicly traded companies within the Company's peer group. Private Placement Warrants The Warrant liabilities are measured at fair value at inception and on a recurring basis, with changes in fair value presented within change in fair value of Warrant liabilities in the statement of operations. The Private Placement warrants are valued using a Monte Carlo simulation model, which is considered to be a Level 3 fair value measurement. The volatility for the Private Placement warrants, a key input into the valuation, was estimated to be 25 % based on a calibration to the publicly traded per share price of the Company's Class A common stock as of December 31, 2021 (Successor). Other key inputs into the valuation include a term of 5.0 years, a strike price of $ 11.50 per share, and an assumption that the Private Placement warrants will remain outstanding until maturity since the Private Placement warrants are not redeemable. In instances whereby inputs used to measure fair value fall into different levels in the above fair value hierarchy, fair value measurements in their entirety are categorized based on the lowest level input that is significant to the valuation. The Company’s assessment of the significance of particular inputs to these fair value measurements requires judgment and considers factors specific to each asset or liability.

Income Taxes

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 18. Income Taxes The Company calculates the provision for income taxes during interim periods by applying an estimate of the forecasted annual effective tax rate for the full fiscal year to "ordinary" income or loss (pretax income or loss excluding unusual or infrequently occurring discrete items) for the reporting period. The benefit for income taxes was $ 79 for the six months ending June 30, 2022 compared to $ 78 for the six months ended June 30, 2021. The effective tax rate, including discrete items, was - 0.18 % for the period ended June 30, 2022 compared to 3.5 % for the six months ended June 30, 2021. The change in the effective tax rate relates primarily to the change in organizational structure stemming from the Business Combination in December of 2021. In addition, the tax provision for the period ended June 30, 2022 is impacted by permanent differences with respect to gains and losses recorded on the earn-out share liability, sponsor share liability, and warrant liabilities, none of which were outstanding liabilities as of June 30, 2021. The Company recorded a deferred tax asset of $ 4,481 through additional paid in capital related to the exchange during the second quarter of Fathom OpCo's exchangeable Class A Units (and the associated vote-only Class B shares) for an equal number of Class A shares. The Company evaluates the realizibility of the deferred tax assets on a quarterly basis and establishes a valuation allowance when it is more likely than not that all or a portion of a deferred tax asset may not be realized. For the six months ended June 30, 2022, the Company made no material adjustments to its assertion that deferred tax assets are not more-likely than not to be realized. As of June 30, 2022, the Company did no t recognize income tax expense or benefits associated with uncertain tax positions.

Commitment and Contingencies

Commitment and Contingencies	6 Months Ended
Commitment and Contingencies	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 19. Commitments and Contingencies The Company is subject to various claims and lawsuits that arise in the ordinary course of business. It is the opinion of management that the disposition or ultimate resolution of such claims and lawsuits will not have a material effect on the Company’s financial condition, comprehensive gain (loss) or cash flows.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
Variable Interest Entities	Jun. 30, 2022
Variable Interest Entities [Abstract]
Variable Interest Entities	Note 20. Variable Interest Entities Based upon the criteria set forth in ASC 810, the Company consolidates variable interest entities (“VIEs”) in which it has a controlling financial interest and is therefore deemed the primary beneficiary. A controlling financial interest will have both of the following characteristics: (a) the power to direct the VIE activities that most significantly impact economic performance; and (b) the obligation to absorb the VIE losses and the right to receive benefits that are significant to the VIE. The Company has determined that Fathom OpCo meets the definition of a VIE and that the Company is the primary beneficiary of Fathom OpCo beginning on the date of the Business Combination, and therefore the Company must consolidate Fathom OpCo from the date of the Business Combination. The following table presents a summary of the total assets, liabilities, and shareholders' equity of the Company’s consolidated VIE, which is comprised solely of Fathom OpCo. Period Ended June 30, 2022 Fathom OpCo Standalone Total assets $ 1,562,841 Total liabilities 194,931 Total shareholders' equity 1,367,910

Subsequent Events

Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 21. Subsequent Events On July 7, 2022, the Company's Board of Directors approved a reorganization plan (the "Reorganization") designed to consolidate the Company’s national footprint, streamline legacy leadership, and centralize core business functions following the completion of 13 acquisitions by Fathom since 2019. Pursuant to the Reorganization, the Company intends to: Consolidate its existing facility in Oakland, CA into Fathom headquarters in Hartland, WI, improving utilization and reducing costs; Establish a Fathom technology center in the Bay Area that will focus on new and emerging technologies, specifically in the additive market; and Consolidate leadership and other roles through a net workforce reduction of approximately 6 %, create an accounting shared service organization to streamline company-wide processes and create economies of scale while pursuing additional shared-service systems in other administrative functions. The approved plan is expected to achieve approximately $ 5.5 million in net pre-tax annualized cost savings upon completion. The savings for the current fiscal year are expected to be limited as the plan is implemented over the remainder of 2022 and into 2023. Additionally, the Company expects to incur pre-tax restructuring charges related to these activities totaling approximately $ 2.0 million, consisting of approximately $ 0.8 million in severance and other employee-related costs, $ 0.5 million in fixed asset and facility related write-down expenses, and $ 0.8 in other associated moving and relocation costs. The Company expects to incur approximately $ 0.9 million of the total restructuring charges in the third quarter of 2022, with the remaining charges to be incurred throughout the remainder of the restructuring process. The total cash expenditures associated with the plan are expected to be $ 1.7 million. The Company anticipates that the initiative will be substantially complete by the end of the second quarter of 2023.

Basis of Presentation (Policies

Basis of Presentation (Policies)	6 Months Ended
Basis of Presentation (Policies)	Jun. 30, 2022
Accounting Policies [Abstract]
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-02, Leases (Topic 842) Section A - Leases: Amendments to the FASB Accounting Standards Codification. The standard requires lessees to recognize the assets and liabilities arising from leases on the balance sheet and retains a distinction between finance leases and operating leases. The classification criteria for distinguishing between finance leases and operating leases are substantially similar to the classification criteria for distinguishing between capital leases and operating leases in the previous lease guidance. The Company adopted this standard and related amendments in the first quarter of 2022, using the modified retrospective approach. Using the modified retrospective approach the Company determined an incremental borrowing rate at the date of adoption based on the total lease term and total minimum rental payments. The modified retrospective approach provides a method for recording existing leases at adoption with a cumulative adjustment to retained earnings. The Company elected the package of practical expedients which permits the Company to not reassess (1) whether any expired or existing contracts are or contain leases, (2) the lease classification for any expired or existing leases, and (3) any initial direct costs for any expired or existing leases as of the effective date. The Company also elected the practical expedient to use hindsight when determining the lease term, and the practical expedient lease considerations to not allocate lease considerations between lease and non-lease components for real estate leases. As such, real estate lease considerations are treated as a single lease-component and accounted for accordingly. The Company excludes leases with an initial term of 12 months or less from the application of Topic 842. Adoption of the new standard resulted in the recording of $ 3,122 and $ 8,195 of current lease liabilities and long-term lease liabilities, respectively, and $ 11,986 in corresponding right-of-use lease assets. The difference between the approximate value of the right-of-use lease assets and lease liabilities is attributable to future rent escalations. The cumulative change in the beginning accumulated deficit was $ 82 due to the adoption of Topic 842. There was no material impact on the Company’s consolidated statement of operations or consolidated statement of cash flows. The Company’s comparative periods continue to be presented and disclosed in accordance with legacy guidance in Topic 840.

Business Combination with Fat_2

Business Combination with Fathom OpCo (Tables) - Fathom OpCo [Member]	6 Months Ended
	Jun. 30, 2022
Business Acquisition [Line Items]
Schedule of fair value of the total purchase consideration transferred	The Business Combination was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred was $ 1,364,220 . The following table sets forth the fair value of the assets and liabilities assumed in connection with the acquisition Total Assets acquired: Cash $ 9,577 Accounts receivable, net 24,712 Inventory 12,825 Prepaid expenses and other current assets 3,172 Property and equipment, net 44,397 Goodwill 1,189,762 Intangible assets 270,000 Other non-current assets 2,200 Total assets acquired 1,556,645 Liabilities assumed: Accounts payable 9,808 Accrued expenses 4,860 Other current liabilities 5,226 Current portion of debt 152,000 Other noncurrent liabilities 20,531 Total liabilities assumed 192,425 Net identifiable assets acquired $ 1,364,220 The following table illustrates a summary of the total consideration transferred.
Schedule of fair values of the assets and liabilities	Total Consideration Transferred: Total cash consideration $ 53,332 Fathom earnout shares 88,160 Class A common stock transferred 375,478 Tax Receivable Agreement obligations to the sellers 4,300 Total consideration transferred to sellers 521,270 Non-controlling interest 842,950 Fair value of total consideration transferred $ 1,364,220
Summary of the intangible assets acquired in the acquisition	Identifiable Intangible Assets Provisional fair value Provisional useful life (in years) Trade name $ 70,000 15 Customer relationships 180,000 19 Developed software 15,700 5 Developed technology 4,300 5 $ 270,000

Fathom OpCo Predecessor Perio_2

Fathom OpCo Predecessor Period Acquisitions (Tables)	6 Months Ended
Fathom OpCo Predecessor Period Acquisitions (Tables)	Jun. 30, 2022
Summit [Member]
Business Acquisition [Line Items]
Schedule of fair value of the total purchase consideration transferred	The transaction was accounted for using the acquisition method of accounting in accordance with Accounting Standards Codification ("ASC") 805 - Business Combinations and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 10,875 Fair value of total consideration transferred $ 10,875
Schedule of fair values of the assets and liabilities	The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Summit: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 40 Accounts receivable, net 627 Inventory 339 Property and equipment, net 4,371 Intangible assets 5,000 Total assets acquired 10,377 Accounts payable 40 Deferred revenue 776 Other current liabilities 1,418 Total liabilities assumed 2,234 Total identifiable net assets 8,143 Goodwill $ 2,732
Summary of the intangible assets acquired in the acquisition	Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 400 5 Customer relationships 4,600 11 $ 5,000
Summary of Revenue and Net Loss Income Since Acquisition	The amounts of revenue and net loss of Summit since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period are as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,753 Net loss $ ( 1,367 )
P P C [Member]
Business Acquisition [Line Items]
Schedule of fair value of the total purchase consideration transferred	The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 25,721 Fair value of total consideration transferred $ 25,721
Schedule of fair values of the assets and liabilities	The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of PPC: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 162 Accounts receivable, net 899 Inventory 480 Fixed assets, net 2,413 Intangible assets 14,200 Total assets acquired 18,154 Accounts payable 148 Accrued expenses 79 Total liabilities assumed 227 Total identifiable net assets 17,927 Goodwill $ 7,794
Summary of the intangible assets acquired in the acquisition	Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 1,100 5 Customer relationships 13,100 17 Total intangible assets $ 14,200
Summary of Revenue and Net Loss Income Since Acquisition	The amounts of revenue and net loss of PPC since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,837 Net loss $ ( 635 )
Centex and Laser [Member] \| Incodema Holdings LLC
Business Acquisition [Line Items]
Schedule of fair value of the total purchase consideration transferred	The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Centex Laser Total Cash $ 11,774 $ 6,946 $ 18,720 Fair value of total consideration transferred $ 11,774 $ 6,946 $ 18,720
Schedule of fair values of the assets and liabilities	The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Centex and Laser: Acquisition Date Fair Value Centex Laser Recognized amounts of identifiable assets acquired and liabilities assumed Cash $ - $ 68 Accounts receivable, net 1,775 900 Inventory 524 622 Prepaid expenses 108 1 Fixed assets, net 1,787 760 Intangible assets 6,243 3,557 Other assets 1 2 Total assets acquired 10,438 5,910 Accounts payable 252 568 Paycheck Protection Program (PPP) loan 649 - Accrued expenses 271 27 Other current liabilities 23 44 Other noncurrent liabilities 1,234 703 Total liabilities assumed 2,429 1,342 Total identifiable net assets 8,009 4,568 Goodwill $ 3,765 $ 2,378
Summary of the intangible assets acquired in the acquisition	Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Estimated Life (Years) Trade name $ 510 5 Customer relationships 5,733 17 Total intangible assets $ 6,243 Acquisition Date Estimated Life (Years) Trade name $ 290 5 Customer relationships 3,267 17 Total intangible assets $ 3,557
Summary of Revenue and Net Loss Income Since Acquisition	The combined amounts of revenue and net loss of Centex and Laser since the acquisition date included in the consolidated statement of comprehensive loss for the 2021 Predecessor Period and is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 2,326 Net loss $ ( 1,240 )
Micropulse West [Member] \| Incodema Holdings LLC
Business Acquisition [Line Items]
Schedule of fair value of the total purchase consideration transferred	The transaction was accounted for using the acquisition method of accounting and the fair value of the total purchase consideration transferred consisted of the following: Consideration Transferred: Total Cash $ 12,452 Contingent consideration 1,295 Fair value of total consideration transferred $ 13,747
Schedule of fair values of the assets and liabilities	The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition of Micropulse West: Recognized amounts of identifiable assets acquired and liabilities assumed Total Cash $ 70 Accounts receivable, net 866 Inventory 333 Other current assets 10 Fixed assets, net 2,490 Intangible assets 7,000 Total assets acquired 10,769 Accounts payable 139 Accrued expenses 13 Other current liabilities 99 Total liabilities assumed 251 Total identifiable net assets 10,518 Goodwill $ 3,229
Summary of the intangible assets acquired in the acquisition	Below is a summary of the intangible assets acquired in the acquisition: Acquisition Date Fair Value Estimated Life (Years) Trade name $ 600 5 Customer relationships 6,400 17 Total intangible assets $ 7,000
Summary of Revenue and Net Loss Income Since Acquisition	The amounts of revenue and net loss of Micropulse West since the acquisition date included in the 2021 Predecessor Period consolidated statement of comprehensive loss is as follows: Period From January 1 - June 30, 2021 (Predecessor) Revenue $ 1,134 Net loss $ ( 223 )

Revenue (Tables)

Revenue (Tables)	6 Months Ended
Revenue (Tables)	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Schedule of Revenue by Product Line	Revenue by product line for the three and six months ended June 30, 2022 and June 30, 2021 are as follows: Three Months Ended Six Months Ended June 30, 2022 (Successor) June 30, 2021 (Predecessor) June 30, 2022 (Successor) June 30, 2021 (Predecessor) Revenue: Additive Manufacturing $ 4,410 $ 4,302 $ 8,559 $ 8,842 Injection Molding 7,093 6,492 13,908 13,129 CNC Machining 14,584 11,072 27,910 15,903 Precision Sheet Metal 14,751 12,093 29,434 25,210 Ancillary Product Lines 1,147 1,913 2,715 3,322 Total revenue $ 41,985 $ 35,872 $ 82,526 $ 66,406

Inventories (Tables)

Inventories (Tables)	6 Months Ended
Inventories (Tables)	Jun. 30, 2022
Inventory Disclosure [Abstract]
Schedule of Inventories	Inventories consisted of the following: Period Ended June 30, December 31, Raw materials $ 3,875 $ 4,967 Work in process 8,648 5,368 Finished goods 1,710 3,506 Tooling 636 605 14,869 14,446 Allowance for obsolescence ( 769 ) ( 1,281 ) Total $ 14,100 $ 13,165

Property and Equipment (Tables)

Property and Equipment (Tables)	6 Months Ended
Property and Equipment (Tables)	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Summary of Property and Equipment	Property and equipment, net, consisted of the following: Period Ended June 30, 2022 December 31, 2021 Machinery and equipment $ 34,461 $ 33,182 Furniture and fixtures 165 180 Computer equipment 373 804 Property and leasehold improvements 6,942 7,180 Construction in progress 7,835 2,859 Transportation equipment 329 454 Total 50,105 44,659 Accumulated depreciation and amortization ( 3,197 ) ( 132 ) Total $ 46,908 $ 44,527

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets, Net (Tables)	6 Months Ended
Goodwill and Intangible Assets, Net (Tables)	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Rollforward of Goodwill	A rollforward of goodwill is as follows: Balance at December 31, 2021 $ 1,189,464 Measurement period adjustments ( 1,023 ) Balance at June 30, 2022 $ 1,188,441
Schedule of Intangible Assets, Net	Intangible assets, net consisted of the following: June 30, 2022 December 31, 2021 Gross Accumulated Amortization Net Gross Accumulated Amortization Net Trade name $ 70,000 $ 2,448 $ 67,552 $ 70,000 $ 98 $ 69,902 Customer relationships 180,000 4,971 175,029 180,000 252 179,748 Developed software 15,700 1,647 14,053 15,700 22 15,678 Developed technology 4,300 451 3,849 4,300 6 4,294 Total intangible assets $ 270,000 $ 9,517 $ 260,483 $ 270,000 $ 378 $ 269,622
Schedule of Estimated Aggregate Amortization Expense	The following table represents the estimated aggregate amortization expense for each of the five succeeding fiscal calendar years. Year Aggregate Amortization Remaining 2022 $ 9,070 2023 18,140 2024 18,140 2025 18,140 2026 18,041

Warrant Liability (Tables)

Warrant Liability (Tables)	6 Months Ended
Warrant Liability (Tables)	Jun. 30, 2022
Warrants and Rights Note Disclosure [Abstract]
Summary of Number of Outstanding Warrants and Fair Value	The below table summarizes the number of outstanding warrants and the fair value as of June 30, 2022 and December 31, 2021. June 30, 2022 December 31, 2021 Fair Value # of Warrants Fair Value # of Warrants Public Warrants $ 3,300 8,625,000 $ 7,600 8,625,000 Private Placement Warrants 10,000 9,900,000 26,300 9,900,000 Total Warrant Liability $ 13,300 $ 33,900

Debt (Tables)

Debt (Tables)	6 Months Ended
Debt (Tables)	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	The Company’s debt as of June 30, 2022 and December 31, 2021 is as follows: As of June 30, 2022 As of December 31, 2021 Debt Description Interest Rate Amount Interest Rate Amount New Credit Agreement Revolver 5.41 % $ 27,000 3.60 % $ 27,000 New Credit Agreement Term Loan 5.75 % 123,438 3.72 % 125,000 Total principal long-term debt 150,438 152,000 Debt issuance costs ( 1,582 ) ( 1,812 ) Total debt, net 148,856 150,188 Less: current portion of debt 31,179 29,697 Long-term debt, net of current portion $ 117,677 $ 120,491

Other (Income) Expense (Tables)

Other (Income) Expense (Tables)	6 Months Ended
Other (Income) Expense (Tables)	Jun. 30, 2022
Other Income and Expenses [Abstract]
Schedule of Other (Income) Expense	Other income and expense, net for the three and six months ended June 30, 2022 and June 30, 2021 are as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Acquisition expenses $ - $ 2,706 $ - $ 4,045 Change in fair value of TRA - $ - - $ - Loss on sale of assets - - 24 - Loss on debt extinguishment - 2,031 - 2,031 Loan prepayment fees - 1,463 - 1,463 Other 129 910 171 1,111 Other expense 129 7,110 195 8,650 Change in fair value of Fathom and Sponsor Earnout Shares ( 22,930 ) - ( 41,900 ) - Change in fair value of Warrants ( 12,500 ) - ( 20,600 ) - Change in fair value of TRA ( 200 ) - ( 200 ) - Gain on PPP forgiveness - ( 1,624 ) - ( 1,624 ) Gain on fair value of contingent consideration ( 148 ) ( 1,355 ) ( 148 ) ( 1,355 ) Gain on sale of assets ( 188 ) - ( 188 ) - Other ( 142 ) ( 227 ) ( 187 ) ( 321 ) Other income ( 36,108 ) ( 3,206 ) ( 63,223 ) ( 3,300 ) Other (income) expense, net $ ( 35,979 ) $ 3,904 $ ( 63,028 ) $ 5,350

Shared Based Compensation (Tabl

Shared Based Compensation (Tables)	6 Months Ended
Shared Based Compensation (Tables)	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Stock Option Valuation Assumptions	The following table summarizes provides the assumptions used in the Black-Scholes model valuation of stock options for the six months ended June 30 2022: June 30, 2022 Expected term (years) 4.5 Expected volatility 58.7 % Expected dividend yield 0.0 % Risk-free interest rate 1.91 % Fair value of share $ 4.26
Schedule of Non-vested Restricted Stock Unit and Restricted Stock Activity	A summary of the status of the Company's restricted stock unit and restricted stock award activity and the changes during the six months ended June 30, 2022 are as follows: Shares Weighted Average Grant Date Fair Value Aggregate Intrinsic Value Non-vested at December 31, 2021 1,468,392 $ 10.00 $ - Granted 871,430 8.73 - Vested ( 822,606 ) 10.00 - Forfeited ( 4,035 ) 8.72 - Non-vested at June 30, 2022 1,513,181 $ 8.09 $ -

Earnings Per Share and Earnin_2

Earnings Per Share and Earnings Per Unit (Tables)	6 Months Ended
Earnings Per Share and Earnings Per Unit (Tables)	Jun. 30, 2022
Earnings Per Unit [Abstract]
Schedule of Basic Earnings Per Share	The Company's basic earnings per share calculation is as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Class A Class A Basic Earnings Per Share: Numerator Net income $ 33,979 $ 51,813 Less: Net loss attributable to non-controlling interests ( 442 ) ( 5,702 ) Net income attributable to Class A common stock $ 34,421 $ 57,515 Denominator Weighted average shares of Class A common stock outstanding-basic 52,259,885 51,530,961 Basic Earnings Per Share $ 0.66 $ 1.12
Schedule of Diluted Earnings Per Share	The Company's diluted earnings per share calculation is as follows: Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Class A Class A Diluted Earnings Per Share: Numerator Net income attributable to holders of Class A common stock $ 34,421 $ 57,515 Denominator Weighted average shares of Class A common stock outstanding-basic 52,259,885 51,530,961 Effect of Dilutive Securities Assumed exchange for shares of Class A common stock 83,264,888 83,774,207 Weighted average shares of Class A common stock outstanding-diluted 135,524,773 135,305,168 Diluted Earnings Per Share $ 0.25 $ 0.43
Schedule Of Earnings Per Share, Basic and Diluted	Period From April 1 - June 30, April 1 - June 30, Class A Class B Basic and Diluted Loss Per Unit: Numerator Net loss $ ( 2,897 ) $ ( 1,185 ) Less: annual dividends on redeemable preferred units ( 5,574 ) ( 2,282 ) Net loss attributable to common unitholders ( 8,471 ) ( 3,467 ) Denominator Weighted-average units used to compute basic earnings per unit 5,480,611 2,242,981 Basic and Diluted Loss Per Unit $ ( 1.55 ) $ ( 1.55 ) Period From January 1 - June 30, January 1 - June 30, Class A Class B Basic and Diluted Loss Per Unit: Numerator Net loss $ ( 3,251 ) $ ( 1,331 ) Less: annual dividends on redeemable preferred units ( 7,188 ) ( 2,942 ) Net loss attributable to common unitholders ( 10,439 ) ( 4,273 ) Denominator Weighted-average units used to compute basic earnings per unit 5,480,611 2,242,981 Basic and Diluted Loss Per Unit $ ( 1.90 ) $ ( 1.90 )

Shareholders' Equity, Noncont_2

Shareholders' Equity, Noncontrolling interest, and Members' Equity (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule Of Calculation Of Comprehensive Loss Attributable To Non-controlling Interest Holders	The table below demonstrates the calcul ation of the comprehensive loss attributable to the non-controlling interest holders for the 2022 Successor Period. Period From April 1, 2022 - June 30, 2022 Period From January 1, 2022 - June 30, 2022 Fathom OpCo comprehensive loss $ ( 808 ) $ ( 9,884 ) Non-controlling interest percentage 54.8 % 54.8 % Comprehensive loss attributable to non-controlling interest $ ( 442 ) $ ( 5,702 )
Summary Of Members Equity	The following table represents a summary of the Company’s Members' Equity as of June 30, 2021 (Predecessor): June 30, 2021 Class A common units 5,480,611 Class B common units 2,242,981

Leases (Tables)

Leases (Tables)	6 Months Ended
Leases (Tables)	Jun. 30, 2022
Lessee Disclosure [Abstract]
Schedule of balance sheet location disclosure	Balance Sheet Location June 30, 2022 Assets Operating Right-of-use operating lease assets, net $ 8,081 Financing Right-of-use financing lease assets, net 2,363 Total lease assets $ 10,444 Liabilities Current Operating Current operating lease liability $ 2,976 Financing Current financing lease liability 190 Non-Current Operating Long-term operating lease liability 5,160 Financing Long-term financing lease liability 2,227 Total lease liability $ 10,553
Schedule of lease cost	The following table sets forth our lease costs included in our unaudited consolidated statement of comprehensive income (loss): Three Months Ended Six Months Ended June 30, 2022 June 30, 2022 Operating lease cost $ 817 $ 1,620 Short-term lease cost 4 8 Financing lease cost: Amortization of ROU assets 54 108 Interest on lease liabilities 34 69 Sublease income ( 34 ) ( 68 ) Total lease costs $ 875 $ 1,737
Schedule of weighted average remaining lease term and the weighted average discount rate for the Company's operating leases	June 30, 2022 Weighted-average remaining lease term (years) Operating 3.6 Financing 8.6 Weighted-average discount rate Operating 4.2 % Financing 5.6 %
Summary of maturities of leases	Maturities of Leases Operating Leases Financing Leases Total Remainder of 2022 $ 1,802 $ 159 $ 1,961 2023 2,951 325 3,276 2024 1,780 335 2,115 2025 1,126 345 1,471 2026 638 356 994 Thereafter 693 1,566 2,259 Total future lease payments 8,990 3,086 12,076 Less: Discount 854 669 1,523 Present value of lease liability $ 8,136 $ 2,417 $ 10,553
Schedule of Future Minimum Lease Payments Obligations	As of December 31, 2021, future minimum lease payment obligations were as follows: Year Total 2022 $ 3,212 2023 3,027 2024 1,959 2025 1,253 2026 443 Thereafter 328 Total future lease payments $ 10,222

Tax Receivable Agreement (Table

Tax Receivable Agreement (Tables)	6 Months Ended
Tax Receivable Agreement (Tables)	Jun. 30, 2022
Tax Receivable Agreement Abstract
Summary of Changes in Tax Receivable Agreement Liabilities	The following table summarizes the changes in the TRA liabilities: Tax Receivable Agreement Liability Beginning balance as of December 31, 2021 $ 4,600 Fair value measurement ( 200 ) Conversion of non-controlling interest 5,000 Ending Balance as of June 30, 2022 9,400 Less: Current portion included in other current liabilities - Total long-term tax receivable agreement liability $ 9,400

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
Fair Value Measurement (Tables)	Jun. 30, 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Schedule of Fair Value Measurement of Assets and Liabilities Based on Hierarchy	The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of June 30, 2022. Fair Value Measurements as of June 30, 2022 Description Level 1 Level 2 Level 3 Total Liabilities: Tax Receivable Agreement $ - $ - $ 4,400 $ 4,400 Fathom OpCo acquisitions contingent consideration - - 700 700 Sponsor Earnout Shares Liability - - 4,090 4,090 Fathom Earnout Shares Liability - - 27,690 27,690 Warrant liability – Public Warrants 3,300 - - 3,300 Warrant liability – Private Placement Warrants - - 10,000 10,000 $ 3,300 $ - $ 46,880 $ 50,180 The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of December 31, 2021. Fair Value Measurements as of December 31, 2021 Description Level 1 Level 2 Level 3 Total Liabilities: Tax Receivable Agreement $ - $ - $ 4,600 $ 4,600 Fathom OpCo acquisitions contingent consideration - - 3,598 3,598 Sponsor Earnout Shares Liability - - 9,380 9,380 Fathom Earnout Shares Liability - - 64,300 64,300 Warrant liability – Public Warrants 7,600 - - 7,600 Warrant liability – Private Placement Warrants - - 26,300 26,300 $ 7,600 $ - $ 108,178 $ 115,778
Reconciliation of Beginning and Ending Balances of Recurring Level 3 Fair Value Measurements	The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements. Level 3 Liabilities Tax Receivable Agreement liability Fathom OpCo acquisitions contingent consideration Sponsor Earnout shares liability Fathom Earnout shares liability Warrant liability – Private Placement Warrants Total Balance at December 31, 2021 $ 4,600 $ 3,598 $ 9,380 $ 64,300 $ 26,300 $ 108,178 Payments - ( 2,750 ) - - - $ ( 2,750 ) Net (gain) loss (1) ( 200 ) ( 148 ) ( 5,290 ) ( 36,610 ) ( 16,300 ) $ ( 58,548 ) Ending balance at June 30, 2022 $ 4,400 $ 700 $ 4,090 $ 27,690 $ 10,000 $ 46,880 (1) Net gains on changes in recurring level 3 fair value measurements are recognized in Other income and net losses on change in recurring level 3 fair value measurements are recognized in other expense in our unaudited consolidated statement of comprehensive loss.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	6 Months Ended
Variable Interest Entities (Tables)	Jun. 30, 2022
Variable Interest Entities [Abstract]
Summary of Total Assets, Liabilities, and Equity of the Company's Consolidated VEI	The following table presents a summary of the total assets, liabilities, and shareholders' equity of the Company’s consolidated VIE, which is comprised solely of Fathom OpCo. Period Ended June 30, 2022 Fathom OpCo Standalone Total assets $ 1,562,841 Total liabilities 194,931 Total shareholders' equity 1,367,910

Nature of Business - Additional

Nature of Business - Additional Information (Details)	6 Months Ended
Nature of Business - Additional Information (Details)	Jun. 30, 2022
Nature Of Business [Line Items]
Limited Liability Company or Limited Partnership, Business, Formation Date	Apr. 16, 2021
MCT Group Holdings LLC \| Equity Interest [Member]
Nature Of Business [Line Items]
Ownership Interest	100%
Incodema Holdings LLC \| Equity Interest [Member]
Nature Of Business [Line Items]
Ownership Interest	100%

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounting Policies [Line Items]
Current lease liabilities	$ 3,122
Long-term lease liabilities	8,195
Right-of-use assets	11,986
Accumulated deficit	9,913	$ (47,581)
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accounting Policies [Line Items]
Accumulated deficit	$ (82)

Significant Accounting Policies

Significant Accounting Policies - Basic and Diluted Net Income (Loss) Per Ordinary Share (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income (loss)	$ 34,421	$ 22,991	$ (4,082)	$ 57,515	$ (4,582)

Business Combination with Fat_3

Business Combination with Fathom OpCo - Additional Information (Details) $ / shares in Units, $ in Thousands		6 Months Ended
	Dec. 23, 2021 USD ($) Vote $ / shares shares	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Number of votes per share \| Vote	1
Business combination acquisition costs expensed	$ 19,010
Weighted average amortization period		16 years 10 months 24 days
Fathom OpCo [Member]
Business Acquisition [Line Items]
Deferred tax liability recognized			$ 17,573
Fair value of total purchase consideration transferred		$ 1,364,220
Fathom OpCo [Member] \| Class A Common Shares
Business Acquisition [Line Items]
Seller earnout contingent consideration		$ 9,000,000
Earnout shares vested \| shares	3,000,000
Fathom OpCo [Member] \| Class A Common Shares \| First Tranche [Member]
Business Acquisition [Line Items]
Volume weighted average share price thresholds \| $ / shares	$ 12.50
Fathom OpCo [Member] \| Class A Common Shares \| Second Tranche [Member]
Business Acquisition [Line Items]
Volume weighted average share price thresholds \| $ / shares	15
Fathom OpCo [Member] \| Class A Common Shares \| Third Tranche [Member]
Business Acquisition [Line Items]
Volume weighted average share price thresholds \| $ / shares	$ 20
Fathom OpCo [Member] \| Public investors, PIPE Investors and Founders [Member] \| Class A Common Shares
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired	10.40%
Fathom OpCo [Member] \| CORE Investors and Other Legacy Fathom Owners [Member] \| Class A Common Shares
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired	89.60%

Business Combination with Fat_4

Business Combination with Fathom OpCo - Summary of Total Purchase Consideration Transferred (Details) - Fathom OpCo [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Business Acquisition [Line Items]
Total cash consideration	$ 53,332
Fathom earnout shares	88,160
Class A common stock transferred	375,478
Tax Receivable Agreement obligations to the sellers	4,300
Business combination consideration transferred, Total	521,270
Non-controlling interest	842,950
Fair value of total consideration transferred	$ 1,364,220

Business Combination with Fat_5

Business Combination with Fathom OpCo - Schedule of Fair Values of the Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets acquired:
Goodwill	$ 1,188,441	$ 1,189,464
Fathom OpCo [Member]
Assets acquired:
Cash	9,577
Accounts receivable, net	24,712
Inventory	12,825
Prepaid expenses and other current assets	3,172
Property and equipment, net	44,397
Goodwill	1,189,762
Intangible assets	270,000
Other non-current assets	2,200
Total assets acquired	1,556,645
Liabilities assumed:
Accounts payable	9,808
Accrued expenses	4,860
Other current liabilities	5,226
Current portion of debt	152,000
Other noncurrent liabilities	20,531
Total liabilities assumed	192,425
Total identifiable net assets	$ 1,364,220

Business Combination with Fat_6

Business Combination with Fathom OpCo - Summary of Intangible Assets Acquired in the Acquisition (Details) - Fathom OpCo [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 270,000
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 70,000
Provisional useful life	15 years
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 180,000
Provisional useful life	19 years
Developed Software [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 15,700
Provisional useful life	5 years
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Provisional fair value	$ 4,300
Provisional useful life	5 years

Fathom OpCo Predecessor Perio_3

Fathom OpCo Predecessor Period Acquisitions - Summit and PPC - Additional Information (Details) - USD ($) $ in Thousands	Dec. 23, 2021	Apr. 30, 2021	Feb. 01, 2021
Business Acquisition [Line Items]
Business combination acquisition costs expensed	$ 19,010
P P C [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired		100%
Business combination acquisition costs expensed		$ 984
Payment of transaction fee to affiliate		$ 264
Summit [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired			100%
Business combination acquisition costs expensed			$ 892
Payment of transaction fee to affiliate			$ 225

Fathom OpCo Predecessor Perio_4

Fathom OpCo Predecessor Period Acquisitions - Summit and PPC - Summary of Total Purchase Consideration Transferred (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Feb. 01, 2021
P P C [Member]
Business Acquisition [Line Items]
Cash	$ 25,721
Fair value of total consideration transferred	$ 25,721
Summit [Member]
Business Acquisition [Line Items]
Cash		$ 10,875
Fair value of total consideration transferred		$ 10,875

Fathom OpCo Predecessor Perio_5

Fathom OpCo Predecessor Period Acquisitions - Summit and PPC - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Apr. 30, 2021	Feb. 01, 2021
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill	$ 1,188,441	$ 1,189,464
P P C [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Cash			$ 162
Accounts receivable, net			899
Inventory			480
Fixed assets, net			2,413
Intangible assets			14,200
Total assets acquired			18,154
Accounts payable			148
Accrued expenses			79
Total liabilities assumed			227
Total identifiable net assets			17,927
Goodwill			$ 7,794
Summit [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Cash				$ 40
Accounts receivable, net				627
Inventory				339
Fixed assets, net				4,371
Intangible assets				5,000
Total assets acquired				10,377
Accounts payable				40
Deferred revenue				776
Other current liabilities				1,418
Total liabilities assumed				2,234
Total identifiable net assets				8,143
Goodwill				$ 2,732

Fathom OpCo Predecessor Perio_6

Fathom OpCo Predecessor Period Acquisitions - Summit and PPC - Summary of Intangible Assets Acquired in Acquisition (Details) - USD ($) $ in Thousands	Apr. 30, 2021	Feb. 01, 2021
P P C [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 14,200
Summit [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value		$ 5,000
Trade Names [Member] \| P P C [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 1,100
Estimated Life (Years)	5 years
Trade Names [Member] \| Summit [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value		$ 400
Estimated Life (Years)		5 years
Customer Relationships [Member] \| P P C [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 13,100
Estimated Life (Years)	17 years
Customer Relationships [Member] \| Summit [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value		$ 4,600
Estimated Life (Years)		11 years

Fathom OpCo Predecessor Perio_7

Fathom OpCo Predecessor Period Acquisitions - Summit and PPC - Summary of Revenue and Net Loss Since Acquisition (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
P P C [Member]
Business Acquisition [Line Items]
Revenue	$ 1,837
Net loss	(635)
Summit [Member]
Business Acquisition [Line Items]
Revenue	2,753
Net loss	$ (1,367)

Fathom OpCo Predecessor Perio_8

Fathom OpCo Predecessor Period Acquisitions - Centex and Laser - Additional Information (Details) - USD ($) $ in Thousands	Dec. 23, 2021	Apr. 30, 2021
Business Acquisition [Line Items]
Business combination acquisition costs expensed	$ 19,010
Centex [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired		100%
Laser [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired		100%
Centex and Laser [Member] \| Incodema Holdings Llc [Member]
Business Acquisition [Line Items]
Business combination acquisition costs expensed		$ 1,226
Payment of transaction fee to affiliate		$ 190

Fathom OpCo Predecessor Perio_9

Fathom OpCo Predecessor Period Acquisitions - Centex and Laser - Summary of Total Purchase Consideration Transferred (Details) $ in Thousands	Apr. 30, 2021 USD ($)
Centex [Member]
Business Acquisition [Line Items]
Cash	$ 11,774
Fair value of total consideration transferred	11,774
Laser [Member]
Business Acquisition [Line Items]
Cash	6,946
Fair value of total consideration transferred	6,946
Centex and Laser [Member]
Business Acquisition [Line Items]
Cash	18,720
Fair value of total consideration transferred	$ 18,720

Fathom OpCo Predecessor Peri_10

Fathom OpCo Predecessor Period Acquisitions - Centex and Laser - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Apr. 30, 2021
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill	$ 1,188,441	$ 1,189,464
Centex [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Accounts receivable, net			$ 1,775
Inventory			524
Prepaid expenses			108
Fixed assets, net			1,787
Intangible assets			6,243
Other assets			1
Total assets acquired			10,438
Accounts payable			252
Paycheck Protection Program (PPP) loan			649
Accrued expenses			271
Other current liabilities			23
Other noncurrent liabilities			1,234
Total liabilities assumed			2,429
Total identifiable net assets			8,009
Goodwill			3,765
Laser [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Cash			68
Accounts receivable, net			900
Inventory			622
Prepaid expenses			1
Fixed assets, net			760
Intangible assets			3,557
Other assets			2
Total assets acquired			5,910
Accounts payable			568
Accrued expenses			27
Other current liabilities			44
Other noncurrent liabilities			703
Total liabilities assumed			1,342
Total identifiable net assets			4,568
Goodwill			$ 2,378

Fathom OpCo Predecessor Peri_11

Fathom OpCo Predecessor Period Acquisitions - Centex and Laser - Summary of Intangible Assets Acquired in Acquisition (Details) $ in Thousands	Apr. 30, 2021 USD ($)
Centex [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 6,243
Centex [Member] \| Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 510
Estimated Life (Years)	5 years
Centex [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 5,733
Estimated Life (Years)	17 years
Laser [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 3,557
Laser [Member] \| Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 290
Estimated Life (Years)	5 years
Laser [Member] \| Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 3,267
Estimated Life (Years)	17 years

Fathom OpCo Predecessor Peri_12

Fathom OpCo Predecessor Period Acquisitions - Centex and Laser - Summary of Revenue and Net (Loss) Income Since Acquisition (Details) - Centex and Laser [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($)
Business Acquisition [Line Items]
Revenue	$ 2,326
Net loss	$ (1,240)

Fathom OpCo Predecessor Peri_13

Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Additional Information (Details) - USD ($) $ in Thousands	Dec. 23, 2021	Apr. 30, 2021
Business Acquisition [Line Items]
Business combination acquisition costs expensed	$ 19,010
Micropulse West [Member]
Business Acquisition [Line Items]
Business acquisition, percentage of interests acquired		100%
Payment of transaction fee to affiliate		$ 130
Micropulse West [Member] \| Other Expense [Member]
Business Acquisition [Line Items]
Business combination acquisition costs expensed		$ 869

Fathom OpCo Predecessor Peri_14

Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Summary of Total Purchase Consideration Transferred (Details) - Micropulse West [Member] $ in Thousands	Apr. 30, 2021 USD ($)
Business Acquisition [Line Items]
Cash	$ 12,452
Contingent consideration	1,295
Fair value of total consideration transferred	$ 13,747

Fathom OpCo Predecessor Peri_15

Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Apr. 30, 2021
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill	$ 1,188,441	$ 1,189,464
Micropulse West [Member]
Recognized amounts of identifiable assets acquired and liabilities assumed
Cash			$ 70
Accounts receivable, net			866
Inventory			333
Other current assets			10
Fixed assets, net			2,490
Intangible assets			7,000
Total assets acquired			10,769
Accounts payable			139
Accrued expenses			13
Other current liabilities			99
Total liabilities assumed			251
Total identifiable net assets			10,518
Goodwill			$ 3,229

Fathom OpCo Predecessor Peri_16

Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Summary of Intangible Assets Acquired in Acquisition (Details) - Micropulse West [Member] $ in Thousands	Apr. 30, 2021 USD ($)
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 7,000
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 600
Estimated Life (Years)	5 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition Date Fair Value	$ 6,400
Estimated Life (Years)	17 years

Fathom OpCo Predecessor Peri_17

Fathom OpCo Predecessor Period Acquisitions - Micropulse West - Summary of Revenue and Net (Loss) Income Since Acquisition (Details) - Micropulse West [Member] $ in Thousands	Apr. 30, 2021 USD ($)
Business Acquisition [Line Items]
Revenue	$ 1,134
Net loss	$ (223)

Revenue - Schedule of Revenue b

Revenue - Schedule of Revenue by Product Line (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 41,985	$ 35,872	$ 82,526	$ 66,406
Additive Manufacturing
Disaggregation of Revenue [Line Items]
Total revenue	4,410	4,302	8,559	8,842
Injection Molding
Disaggregation of Revenue [Line Items]
Total revenue	7,093	6,492	13,908	13,129
CNC Machining
Disaggregation of Revenue [Line Items]
Total revenue	14,584	11,072	27,910	15,903
Precision Sheet Metal
Disaggregation of Revenue [Line Items]
Total revenue	14,751	12,093	29,434	25,210
Ancillary Product Lines
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,147	$ 1,913	$ 2,715	$ 3,322

Inventories - Summary of Invent

Inventories - Summary of Inventories (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Inventory, Net [Abstract]
Raw materials	$ 3,875	$ 4,967
Work in process	8,648	5,368
Finished goods	1,710	3,506
Tooling	636	605
Inventory, gross	14,869	14,446
Allowance for obsolescence	(769)	(1,281)
Total	$ 14,100	$ 13,165

Property and Equipment - Summar

Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	$ 50,105	$ 44,659
Accumulated depreciation and amortization	(3,197)	(132)
Total	46,908	44,527
Machinery & Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	34,461	33,182
Furniture & Fixtures
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	165	180
Computer Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	373	804
Property and Leasehold Improvements
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	6,942	7,180
Construction in Progress
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	7,835	2,859
Transportation Equipment
Property Plant And Equipment [Line Items]
Property and Equipment, Gross	$ 329	$ 454

Property and Equipment - Additi

Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 4,452	$ 2,535	$ 8,968	$ 5,207
Operating Expense [Member]
Property Plant And Equipment [Line Items]
Depreciation and amortization	138	1,405	274	1,521
Cost of Revenue [Member]
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 1,326	$ 924	$ 2,791	$ 1,099

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets, Net - Schedule of Rollforward of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Balance	$ 1,189,464
Measurement period adjustments	(1,023)
Balance	$ 1,188,441

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets, Net - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Finite Lived Intangible Assets [Line Items]
Gross	$ 270,000	$ 270,000
Accumulated Amortization	9,517	378
Net	260,483	269,622
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross	70,000	70,000
Accumulated Amortization	2,448	98
Net	67,552	69,902
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross	180,000	180,000
Accumulated Amortization	4,971	252
Net	175,029	179,748
Developed Software [Member]
Finite Lived Intangible Assets [Line Items]
Gross	15,700	15,700
Accumulated Amortization	1,647	22
Net	14,053	15,678
Developed Technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross	4,300	4,300
Accumulated Amortization	451	6
Net	$ 3,849	$ 4,294

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 4,535,000	$ 2,704,000	$ 9,139,000	$ 5,005,000
Intangible assets other than goodwill with indefinite useful lives	$ 0		$ 0

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets, Net - Schedule of Estimated Aggregate Amortization Expense (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining 2022	$ 9,070
2023	18,140
2024	18,140
2025	18,140
2026	$ 18,041

Warrant Liability - Additional

Warrant Liability - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Class Of Warrant Or Right [Line Items]
Change in fair value of Warrants	$ 12,500	$ 20,600
Public Warrants
Class Of Warrant Or Right [Line Items]
Class of warrants or rights outstanding (in shares)	8,625,000	8,625,000	8,625,000
Fair value price per warrant	$ 0.39	$ 0.39
Private Placement Warrants
Class Of Warrant Or Right [Line Items]
Class of warrants or rights outstanding (in shares)	9,900,000	9,900,000	9,900,000
Fair value price per warrant	$ 1.01	$ 1.01

Warrant Liability - Summary of

Warrant Liability - Summary of Number of Outstanding Warrants and Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Class of Warrant or Right [Line Items]
Fair value of warrants	$ 13,300	$ 33,900
Public Warrants
Class of Warrant or Right [Line Items]
Number of outstanding warrants	8,625,000	8,625,000
Fair value of warrants	$ 3,300	$ 7,600
Private Placement Warrants
Class of Warrant or Right [Line Items]
Number of outstanding warrants	9,900,000	9,900,000
Fair value of warrants	$ 10,000	$ 26,300

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 23, 2021
Debt Instrument [Line Items]
Debt issuance costs gross						$ 1,828
Long term debt date of maturity						Dec. 31, 2026
Interest on debt increments period				90 days
Interest and debt expense		$ 1,843	$ 1,632	$ 3,316	$ 3,746
Amortization of debt issuance costs		130	$ 520	230	$ 616
Financing agreement maturity period	10 months
Financing payments	$ 3,001
Financing fee	$ 35
Financing annual rate	2.57%
SG&A Expenses [Member]
Debt Instrument [Line Items]
Insurance expense		842		1,684
Prepaid Assets [Member]
Debt Instrument [Line Items]
Financing payments recognized in assets		1,345		1,345
Other Current Liabilities [Member]
Debt Instrument [Line Items]
Financing payments recognized in liabilities		1,179		1,179
Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument face value						$ 125,000
New Credit Agreement [Member]
Debt Instrument [Line Items]
Increase decrease in term loan facility and revolving credit facility						100,000
Revolving Credit Facility [Member] \| New Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity						50,000
Borrowings from credit agreement		$ 27,000		$ 27,000
Letter of Credit [Member] \| Revolving Credit Facility [Member] \| New Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity						$ 5,000

Debt - Schedule of Long-term De

Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Total principal long-term debt	$ 150,438	$ 152,000
Debt issuance costs	(1,582)	(1,812)
Long Term Debt Net One, Total	148,856	150,188
Less: current portion of debt	31,179	29,697
Long-term debt, net of current portion	$ 117,677	$ 120,491
New Credit Agreement Revolver [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	5.41%	3.60%
Principal debt	$ 27,000	$ 27,000
New Credit Agreement Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate	5.75%	3.72%
Principal debt	$ 123,438	$ 125,000

Other (Income) Expense - Schedu

Other (Income) Expense - Schedule of Other (Income) Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Other Income and Expenses [Abstract]
Acquisition expenses		$ 2,706	$ 4,045
Change in fair value of TRA	$ (200)		(200)
Loss on sale of assets			24
Loss on extinguishment of debt		2,031		$ 2,031
Loan prepayment fees		1,463		1,463
Other	129	910	171	1,111
Other expense	129	7,110	195	8,650
Change in fair value of Fathom and Sponsor Earnout Shares	(22,930)		(41,900)
Change in fair value of Warrants	(12,500)		(20,600)
Gain on PPP forgiveness		(1,624)		(1,624)
Gain on fair value of contingent consideration	(148)	(1,355)	(148)	(1,355)
Gain on sale of assets	(188)		(188)
Other	(142)	(227)	(187)	(321)
Other income	(36,108)	(3,206)	(63,223)	(3,300)
Other (income) and expense, net	$ (35,979)	$ 3,904	$ (63,028)	$ 5,350

Shared Based Compensation - Add

Shared Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2022	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total intrinsic value of options exercised	$ 0
Share-based compensation expense		$ 1,795	$ 3,925	$ 31
Common Class A [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of stock options granted to purchase shares of common stock	317,091
Weighted average exercise price of stock options granted	$ 8.71
Vesting period	3 years
2021 Omnibus Plan [Member] \| Stock Options [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation cost		1,200	$ 1,200
Cost expected to be recognized, weighted average period			2 years 8 months 1 day
2021 Omnibus Plan [Member] \| Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Unrecognized compensation cost		$ 8,471	$ 8,471
Cost expected to be recognized, weighted average period			2 years 7 months 20 days
Minimum [Member] \| Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			1 year
Maximum [Member] \| Restricted Stock Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Vesting period			3 years

Shared Based Compensation - Sch

Shared Based Compensation - Schedule of Stock Option Valuation Assumptions (Details)) - Stock Options [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected term (years)	4 years 6 months
Expected volatility	58.70%
Expected dividend yield	0%
Risk-free interest rate	1.91%
Fair value of share	$ 4.26

Shared Based Compensation - S_2

Shared Based Compensation - Schedule of Non-vested Restricted Stock Unit and Restricted Stock Activity - (Details) - Restricted Stock Units and Restricted Stock [Member]	6 Months Ended
	Jun. 30, 2022 $ / shares shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Shares, Beginning Balance \| shares	1,468,392
Shares, Granted \| shares	871,430
Shares, Vested \| shares	(822,606)
Shares, Forfeited \| shares	(4,035)
Shares, Ending Balance \| shares	1,513,181
Weighted Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 10
Weighted Average Grant Date Fair Value, Granted \| $ / shares	8.73
Weighted Average Grant Date Fair Value, Vested \| $ / shares	10
Weighted Average Grant Date Fair Value, Forfeited \| $ / shares	8.72
Weighted Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 8.09

Earnings Per Share and Earnin_3

Earnings Per Share and Earnings per Unit - Scheduled Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net income (loss)	$ 34,421	$ 22,991	$ (4,082)	$ 57,515	$ (4,582)
Class A Common Units [Member]
Numerator
Net income (loss)	33,979		(2,897)	51,813	(3,251)
Less: Net loss attributable to non-controlling interests	(442)			(5,702)
Net income (loss) attributable to common stock/Unit	$ 34,421		$ (8,471)	$ 57,515	$ (10,439)
Denominator
Weighted average shares of Class A common stock outstanding-basic	52,259,885		5,480,611	51,530,961	5,480,611
Effect of Dilutive Securities
Assumed exchange for shares of Class A common stock	83,264,888			83,774,207
Weighted average shares of Class A common stock outstanding-diluted	135,524,773			135,305,168
Diluted Earnings Per Share	$ 0.25		$ (1.55)	$ 0.43	$ (1.90)
Basic Earnings Per Share	$ 0.66		$ (1.55)	$ 1.12	$ (1.90)

Earnings Per Share and Earnin_4

Earnings Per Share and Earnings Per Unit - Scheduled Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator
Net income attributable to holders of Class A common stock	$ 34,421	$ 22,991	$ (4,082)	$ 57,515	$ (4,582)
Class A Common Units [Member]
Numerator
Net income attributable to holders of Class A common stock	33,979		$ (2,897)	51,813	$ (3,251)
Net income attributable to holders of Class A common stock	$ 34,421			$ 57,515
Denominator
Weighted average shares of Class A common stock outstanding-basic	52,259,885		5,480,611	51,530,961	5,480,611
Effect of Dilutive Securities
Assumed exchange for shares of Class A common stock	83,264,888			83,774,207
Weighted average shares of Class A common stock outstanding-diluted	135,524,773			135,305,168
Diluted Earnings Per Share	$ 0.25		$ (1.55)	$ 0.43	$ (1.90)

Earnings Per Share and Earnin_5

Earnings Per Share and Earnings per Unit - Summary of Earnings Per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income Loss Available To Common Stockholders Basic [Abstract]
Net loss	$ 34,421	$ 22,991	$ (4,082)	$ 57,515	$ (4,582)
Class A Common Units [Member]
Net Income Loss Available To Common Stockholders Basic [Abstract]
Net loss	33,979		(2,897)	51,813	(3,251)
Less: annual dividends on redeemable preferred units			(5,574)		(7,188)
Net income (loss) attributable to common stock/Unit	$ 34,421		$ (8,471)	$ 57,515	$ (10,439)
Weighted-average units used to compute basic earnings per unit	52,259,885		5,480,611	51,530,961	5,480,611
Basic Loss Per Unit	$ 0.66		$ (1.55)	$ 1.12	$ (1.90)
Diluted Loss Per Unit	$ 0.25		$ (1.55)	$ 0.43	$ (1.90)
Class B Common Stock [Member]
Net Income Loss Available To Common Stockholders Basic [Abstract]
Net loss	$ (1,185)			$ (1,331)
Less: annual dividends on redeemable preferred units	(2,282)			(2,942)
Net income (loss) attributable to common stock/Unit	$ (3,467)			$ (4,273)
Weighted-average units used to compute basic earnings per unit	2,242,981			2,242,981
Basic Loss Per Unit	$ (1.55)			$ (1.90)
Diluted Loss Per Unit	$ (1.55)			$ (1.90)

Shareholders' Equity, Noncont_3

Shareholders' Equity, Noncontrolling interest, and Members' Equity - Additional Information (Details) - $ / shares	3 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)	500,000,000
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Outstanding	0	0
Class A Common Units [Member]
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)	300,000,000
Common stock, par value (in dollars per share)	$ 0.0001
Common stock, shares outstanding	61,596,519
Number conversion of units	10,280,331
Class B Common Units [Member]
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)	180,000,000
Common stock, par value (in dollars per share)	$ 0.0001
Common stock, shares outstanding	74,014,640
Class C Common Units [Member]
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)	10,000,000
Common stock, par value (in dollars per share)	$ 0.0001
Common stock, shares outstanding	0

Shareholders' Equity, Noncont_4

Shareholders' Equity, Noncontrolling interest, and Members' Equity - Schedule Of Calculation Of Comprehensive Loss Attributable To Non-controlling Interest Holders (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Noncontrolling Interest [Line Items]
Fathom OpCo comprehensive loss	$ 34,421	$ (4,080)	$ 57,408	$ (4,687)
Comprehensive loss attributable to non-controlling interest	(442)		(5,702)
Fathom OpCo [Member]
Noncontrolling Interest [Line Items]
Fathom OpCo comprehensive loss	$ (808)		$ (9,884)
Non-controlling interest percentage	54.80%		54.80%
Comprehensive loss attributable to non-controlling interest	$ (442)		$ (5,702)

Shareholders' Equity, Noncont_5

Shareholders' Equity, Noncontrolling interest, and Members' Equity - Schedule Of Members Equity (Details)	Jun. 30, 2022 shares
Class A Common Units [Member]
Members Equity [Line Items]
Common Unit, Outstanding	5,480,611
Class B Common Units [Member]
Members Equity [Line Items]
Common Unit, Outstanding	2,242,981

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2022
Lessee, Lease, Description [Line Items]
Leases, initial term			12 months
Operating lease rent expense	$ 890	$ 1,657
Minimum
Lessee, Lease, Description [Line Items]
Leases, renewal terms			1 year
Maximum
Lessee, Lease, Description [Line Items]
Leases, renewal terms			10 years

Leases - Schedule of Balance Sh

Leases - Schedule of Balance Sheet Disclosure of Leases (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Assets
Operating	$ 8,081
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating
Financing	$ 2,363
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Financing
Total lease assets	$ 10,444
Current
Operating	$ 2,976
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Operating
Financing	$ 190
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Financing
Non-Current
Operating	$ 5,160
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating
Financing	$ 2,227
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Financing
Total lease liability	$ 10,553

Leases - Summary of Lease Costs

Leases - Summary of Lease Costs Included in Unaudited Statement of Comprehensive Income (Loss) (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
Lease, Cost [Abstract]
Operating lease cost	$ 817	$ 1,620
Short-term lease cost	4	8
Finance lease cost
Amortization of ROU assets	54	108
Interest on lease liabilities	34	69
Sublease income	(34)	(68)
Total lease costs	$ 875	$ 1,737
Weighted-average remaining lease term (years), Operating	3 years 7 months 6 days	3 years 7 months 6 days
Weighted-average remaining lease term (years), Financing	8 years 7 months 6 days	8 years 7 months 6 days
Weighted-average discount rate, Operating	4.20%	4.20%
Weighted-average discount rate, Financing	5.60%	5.60%

Leases - Summary of Maturities

Leases - Summary of Maturities of Leases (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Operating Leases
Remainder of 2022	$ 1,802
2023	2,951
2024	1,780
2025	1,126
2026	638
Thereafter	693
Total future lease payments	8,990
Less: Discount	854
Present value of lease liability	8,136
Financing Leases
Remainder of 2022	159
2023	325
2024	335
2025	345
2026	356
Thereafter	1,566
Total future lease payments	3,086
Less: Discount	669
Present value of lease liability	2,417
Total
Remainder of 2022	1,961
2023	3,276
2024	2,115
2025	1,471
2026	994
Thereafter	2,259
Total future lease payments	12,076
Less: Discount	1,523
Present value of lease liability	$ 10,553

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payment Obligations (Details) $ in Thousands	Dec. 31, 2021 USD ($)
Leases, Operating [Abstract]
2022	$ 3,212
2023	3,027
2024	1,959
2025	1,253
2026	443
Thereafter	328
Total future lease payments	$ 10,222

Tax Receivable Agreement - Addi

Tax Receivable Agreement - Additional Information (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
U.S. federal, state and local income tax rate		(0.18%)	3.50%
Additional TRA liability	$ 5,000	$ 5,000
Tax Receivable Agreement [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Percentage of net cash savings payment to tax receivable agreement		85%
Discount rate	0.122	0.122
U.S. federal, state and local income tax rate		26.90%
Additional TRA liability		$ 5,000

Tax Receivable Agreement - Summ

Tax Receivable Agreement - Summary of Changes in Tax Receivable Agreement Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Fair value measurement	$ (200)	$ (200)
Conversion of non-controlling interest	5,000	5,000
Less: Current portion included in other current liabilities	443	443	$ 1,246
Total long-term tax receivable agreement liability	9,400	9,400	$ 4,600
Tax Receivable Agreement [Member]
Related Party Transaction [Line Items]
Beginning balance		4,600
Fair value measurement		(200)
Conversion of non-controlling interest		5,000
Ending Balance	9,400	9,400
Total long-term tax receivable agreement liability	$ 9,400	$ 9,400

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Management Services Agreement [Member]
Related Party Transaction [Line Items]
Related party transactions, expenses	$ 11	$ 482	$ 82	$ 835

Fair Value Measurement - Schedu

Fair Value Measurement - Schedule of Fair Value Measurement of Assets and Liabilities Based on Hierarchy (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	$ 50,180	$ 115,778
Tax Receivable Agreement
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	4,400	4,600
Fathom OpCo Acquisitions Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	700	3,598
Sponsor Earnout Shares Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	4,090	9,380
Fathom Earnout Shares Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	27,690	64,300
Warrant Liability - Public Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	3,300	7,600
Warrant liability – Private Placement Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	10,000	26,300
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	3,300	7,600
Level 1 \| Warrant Liability - Public Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	3,300	7,600
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	46,880	108,178
Level 3 \| Tax Receivable Agreement
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	4,400	4,600
Level 3 \| Fathom OpCo Acquisitions Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities		3,598
Level 3 \| Sponsor Earnout Shares Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	4,090	9,380
Level 3 \| Fathom Earnout Shares Liability
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	27,690	64,300
Level 3 \| Warrant liability – Private Placement Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liabilities	$ 10,000	$ 26,300

Fair Value Measurement - Reconc

Fair Value Measurement - Reconciliation of Beginning and Ending Balances of Recurring Level 3 Fair Value Measurements (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Fathom OpCo Acquisitions Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net (gain) loss	$ (148)	[1]
Fair value, Ending Balance	700
Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	108,178
Payments	(2,750)
Net (gain) loss	(58,548)	[1]
Fair value, Ending Balance	46,880
Level 3 \| Tax Receivable Agreement Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	4,600
Net (gain) loss	(200)	[1]
Fair value, Ending Balance	4,400
Level 3 \| Fathom OpCo Acquisitions Contingent Consideration
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	3,598
Payments	(2,750)
Level 3 \| Sponsor Earnout Shares Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	9,380
Net (gain) loss	(5,290)	[1]
Fair value, Ending Balance	4,090
Level 3 \| Fathom Earnout Shares Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	64,300
Net (gain) loss	(36,610)	[1]
Fair value, Ending Balance	27,690
Level 3 \| Warrant liability – Private Placement Warrants
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value, Beginning Balance	26,300
Net (gain) loss	(16,300)	[1]
Fair value, Ending Balance	$ 10,000

[1] Net gains on changes in recurring level 3 fair value measurements are recognized in Other income and net losses on change in recurring level 3 fair value measurements are recognized in other expense in our unaudited consolidated statement of comprehensive loss.

Fair Value Measurement - Additi

Fair Value Measurement - Additional Information (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) yr $ / shares	Jun. 30, 2021	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Corporate tax rate	(0.18%)	3.50%
Tax Receivable Agreement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business combination contingent consideration liability measurement input	0.122
Corporate tax rate	26.90%
Non-controlling interest percentage	54.80%
Initial amortization deductions	$ 52,400
Taxable income forecast	$ 126,000
Tax Receivable Agreement [Member] \| Class A Common Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Business combination contingent consideration liability measurement input	0.968
Stock price, per share \| $ / shares	$ 3.88
Sale of stock price percentage	25%
Earnout Shares [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected term	5 years
Risk-free interest rate	3%
Strike Price [Member] \| Private Placement Warrants [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value measurements	11.50
Expected Term [Member] \| Private Placement Warrants [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value measurements \| yr	5
Volatility [Member] \| Private Placement Warrants [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value measurements			25
Operating Asset Volatility [Member] \| Earnout Shares [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Volatility	93.30%
Equity Volatility [Member] \| Earnout Shares [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Volatility	101.50%
Minimum [Member] \| Tax Receivable Agreement [Member] \| Class A Common Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost of debt percentage	8.10%
Maximum [Member] \| Tax Receivable Agreement [Member] \| Class A Common Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cost of debt percentage	10.60%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
Income Taxes - Additional Information (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Disclosure [Abstract]
Benefit for income taxes	$ (378,000)	$ 69,000	$ 79,000	$ 78,000
Effective tax rate			(0.18%)	3.50%
Deferred tax assets	$ 4,481,000		$ 4,481,000
Income tax expense or benefits, uncertain tax positions			$ 0

Variable Interest Entity - Summ

Variable Interest Entity - Summary of Total Assets, Liabilities, and Equity of the Company's Consolidated VEI (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Variable Interest Entity [Line Items]
Total assets	$ 1,563,113	$ 1,566,374
Total liabilities	249,413	305,615
Total equity	564,085	$ 418,777	$ 31,363
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Total assets	1,562,841
Total liabilities	194,931
Total equity	$ 1,367,910

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) $ in Millions		6 Months Ended
	Jul. 07, 2022 USD ($) Acquisition	Jun. 30, 2022	Sep. 30, 2022 USD ($)
Subsequent Event [Line Items]
Number of acquisitions since 2019 \| Acquisition	13
Planned restructuring activities, Description		Pursuant to the Reorganization, the Company intends to: Consolidate its existing facility in Oakland, CA into Fathom headquarters in Hartland, WI, improving utilization and reducing costs; Establish a Fathom technology center in the Bay Area that will focus on new and emerging technologies, specifically in the additive market; and Consolidate leadership and other roles through a net workforce reduction of approximately 6%, create an accounting shared service organization to streamline company-wide processes and create economies of scale while pursuing additional shared-service systems in other administrative functions.
Forecast [Member]
Subsequent Event [Line Items]
Reorganization, Expected restructuring charges			$ 0.9
Subsequent Event [Member]
Subsequent Event [Line Items]
Reorganization, Percentage of expected net workforce reduction	6%
Reorganization, Expected net pre-tax annualized cost savings	$ 5.5
Reorganization, Expected restructuring charges	2
Reorganization, Expected cash expenditures	1.7
Subsequent Event [Member] \| Severance and Other Employee-Related Costs [Member]
Subsequent Event [Line Items]
Reorganization, Expected restructuring charges	0.8
Subsequent Event [Member] \| Fixed Asset and Facility Related Write-Down Expenses [Member]
Subsequent Event [Line Items]
Reorganization, Expected restructuring charges	0.5
Subsequent Event [Member] \| Other Associated Moving and Relocation Costs [Member]
Subsequent Event [Line Items]
Reorganization, Expected restructuring charges	$ 0.8