NET Power (NPWR) POS AM 17 May 24 Prospectus update (post-effective amendment) Financial data

Document And Entity Information

Document And Entity Information	3 Months Ended
	Mar. 31, 2024
Document Information Line Items
Entity Registrant Name	NET POWER INC.
Document Type	POS AM
Amendment Flag	true
Amendment Description	On July 7, 2023, NET Power Inc. (the “Company,” “NET Power,” “we,” or “us”) filed a Registration Statement on Form S-1 (File No. 333-273183) which was declared effective by the U.S. Securities and Exchange Commission on September 25, 2023 (the “Existing Registration Statement”). The Existing Registration Statement registered (i) the resale of an aggregate of 204,903,904 shares of the Company’s Class A common stock, par value $0.0001 per share (the “Class A Common Stock”) and (ii) the resale of 10,900,000 warrants to purchase Class A Common Stock at an exercise price of $11.50 per share (the “Private Placement Warrants”) by certain securityholders named in the Existing Registration Statement. On March 13, 2024, the Company filed Post-Effective Amendment No. 1 to the Existing Registration Statement (“POS AM No. 1”) as an exhibit-only filing solely to file a consent of Grant Thornton LLP with respect to its report dated March 11, 2024 relating to the financial statements of the Company contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023, filed with POS AM No. 1 as Exhibit 23.1 therein.This Post-Effective Amendment No. 2 to Form S-1 to the Existing Registration Statement (this “POS AM No. 2”) is being filed to update the prospectus relating to the offering and sale of (a) the shares of outstanding Class A Common Stock covered by the Existing Registration Statement and (b) the remaining shares of Class A Common Stock available for issuance under the Existing Registration Statement (including upon exercise of the Private Placement Warrants).This POS AM No. 2 amends and restates the information contained in the Existing Registration Statement (and all amendments thereto) under the headings contained herein.All filing fees payable in connection with the registration of the shares of Class A Common Stock and Private Placement Warrants covered by this POS AM No. 2 were paid by the Company at the time of the initial filing of the Existing Registration Statement. No additional securities are registered hereby.
Entity Central Index Key	0001845437
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Incorporation, State or Country Code	DE

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 428,595	$ 536,927	$ 5,164
Short-term investments	100,000	100,000
Investments in securities, available-for-sale	69,190
Accounts receivable, net		58	352
Interest receivable	373	1,942
Prepaid expenses	1,501	1,777	184
Other current assets	358	93	1,795
Total current assets	600,017	640,797	7,495
Long-term assets
Investments in securities, available-for-sale	27,793
Intangible assets, net	1,290,453	1,307,265	263
Goodwill	423,920	423,920
Property, plant and equipment, net	101,099	96,856	69,595
Operating lease right-of-use assets	2,120	2,212	784
Total long-term assets	1,845,385	1,830,253	70,642
Total assets	2,445,402	2,471,050	78,137
Current liabilities
Accounts payable	2,669	617	577
Accrued liabilities	7,211	10,915	2,392
Due to related parties		142	178
Operating lease liabilities, current portion	364	347	130
Option liability			5,174
Total current liabilities	10,546	12,021	8,451
Long-term liabilities
Due to related parties			2,212
Earnout Shares liability	2,147	1,671
Warrant liability	70,021	55,920
Asset retirement obligation	2,103	2,060	2,416
Noncurrent operating lease liabilities	1,728	1,808	656
Tax Receivable Agreement liability	10,099	8,937
Deferred taxes	53,085	57,719
Total long-term liabilities	139,183	128,115	5,284
Total liabilities	149,729	140,136	13,735
Commitments and contingencies (Note 14)
Mezzanine shareholders’ and members’ equity
Redeemable non-controlling interests in subsidiary	1,635,900	1,545,905
Shareholders’ and members’ equity
Membership Interests: 4,987,845 units authorized; 3,722,355 units issued and outstanding as of December 31, 2022 (Predecessor)			262,622
Preferred stock, value
Additional paid-in-capital	737,802	851,841	26,288
Accumulated other comprehensive income	224		17
Accumulated deficit
Accumulated deficit	(78,274)	(66,853)	(224,525)
Total shareholders’ equity	659,773	785,009	64,402
Total liabilities, mezzanine shareholders’ equity and shareholders’ equity	2,445,402	2,471,050	78,137
Related Party
Current liabilities
Due to related parties	302	142	178
Long-term liabilities
Due to related parties			2,212
Class A Common Stock
Shareholders’ and members’ equity
Common stock, value	7	7
Class B Common Stock
Shareholders’ and members’ equity
Common stock, value	$ 14	$ 14

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - $ / shares	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Common unit, authorized			4,987,845
Common unit, issued			3,722,355
Common unit, outstanding			3,722,355
Preferred stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	1,000,000	1,000,000	1,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Class A Common Stock
Common stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	520,000,000	520,000,000	520,000,000
Common stock, shares, issued	71,970,052	71,277,906
Common stock, shares, outstanding	71,970,052	71,277,906
Class B Common Stock
Common stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001
Common stock, shares authorized	310,000,000	310,000,000	310,000,000
Common stock, shares, issued	141,801,811	141,787,429
Common stock, shares, outstanding	141,801,811	141,787,429

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Successor [Member]
Revenue
Cost of revenue
Cost of revenue – related party
Gross profit (loss)
Operating expenses
General and administrative	6,383			41,260
General and administrative – related party	26			84
Sales and marketing	751			1,791
Research and development	10,975			25,022
Research and development – related party	267			643
Project development	324			625
Option settlement – related party				79,054
Depreciation, amortization and accretion	20,057			45,031
Total operating expenses	38,783			193,510
Operating loss	(38,783)			(193,510)
Other income (expense)
Interest income (expense)	7,690			19,473
Change in Earnout Shares liability and Warrant liability	(14,577)			26,515
Other income (expense)				(1)
Net other income (expense)	(6,887)			45,987
Net loss before income tax	(45,670)			(147,523)
Income tax benefit	(4,038)			(5,707)
Net loss after income tax	(41,632)			(141,816)
Net loss attributable to non-controlling interests	(30,211)			(98,760)
Net loss attributable to NET Power Inc.	(11,421)			(43,056)
Other comprehensive gain (loss)
Foreign currency translation gain (loss)
Unrealized gain on investments	662
Total other comprehensive gain (loss)	662
Comprehensive loss	(40,970)			(141,816)
Comprehensive loss attributable to non-controlling interests	(29,773)			(98,760)
Comprehensive loss attributable to NET Power Inc.	$ (11,197)			$ (43,056)
Net loss per share of Class A Common Stock (Successor) or per membership interest (Predecessor) (in Dollars per share)	$ (0.16)			$ (0.62)
Weighted average shares basic (in Shares)	71,894,553			69,755,848
Predecessor [Member]
Revenue		$ 50	$ 175		$ 580
Cost of revenue			3		189
Cost of revenue – related party					86
Gross profit (loss)		50	172		305
Operating expenses
General and administrative		5,563	12,684		16,685
General and administrative – related party		110	177		504
Sales and marketing		340	869		801
Research and development		1,102	2,058		3,121
Research and development – related party		6,464	12,243		15,817
Project development		178	479		15
Option settlement – related party
Depreciation, amortization and accretion		3,332	5,812		13,387
Total operating expenses		17,089	34,322		50,330
Operating loss		(17,039)	(34,150)		(50,025)
Other income (expense)
Interest income (expense)		(30)	4		(4,791)
Change in Earnout Shares liability and Warrant liability
Other income (expense)		2	(30)		38
Net other income (expense)		(28)	(26)		(4,753)
Net loss before income tax		(17,067)	(34,176)		(54,778)
Income tax benefit
Net loss after income tax		(17,067)	(34,176)		(54,778)
Net loss attributable to non-controlling interests
Net loss attributable to NET Power Inc.		(17,067)	(34,176)		(54,778)
Other comprehensive gain (loss)
Foreign currency translation gain (loss)					(3)
Unrealized gain on investments
Total other comprehensive gain (loss)					(3)
Comprehensive loss		(17,067)	(34,176)		(54,781)
Comprehensive loss attributable to non-controlling interests
Comprehensive loss attributable to NET Power Inc.		$ (17,067)	$ (34,176)		$ (54,781)
Net loss per share of Class A Common Stock (Successor) or per membership interest (Predecessor) (in Dollars per share)		$ (4.55)	$ (9.07)		$ (14.79)
Weighted average shares basic (in Shares)		3,748,476	3,766,871		3,702,803

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (Parentheticals) - shares	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Successor [Member]
Weighted average shares diluted	71,894,553			69,755,848
Predecessor [Member]
Weighted average shares diluted		3,748,476	3,766,871		3,702,803

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders’ Equity and Non-Controlling Interest (Unaudited) - USD ($) $ in Thousands	Common Stock Successor [Member] Class A	Common Stock Successor [Member] Class B	Common Stock Class A	Common Stock Class B	Ordinary Shares Successor [Member] Class A	Ordinary Shares Successor [Member] Class B	Ordinary Shares Class A	Ordinary Shares Class B	Additional Paid-in- Capital Successor [Member]	Additional Paid-in- Capital	Accumulated Deficit Successor [Member]	Accumulated Deficit	Total Shareholders’ Equity Successor [Member]	Total Shareholders’ Equity	Non- controlling Interests – Mezzanine Equity Successor [Member]	Non- controlling Interests – Mezzanine Equity	RONI Class A Ordinary Shares [Member] Successor [Member]	RONI Class A Ordinary Shares [Member]	Accumulated Other Comprehensive Income	Successor [Member]	Total
Balance at Dec. 31, 2022																					$ 64,402
Net loss																					(141,816)
Balance at Dec. 31, 2023	$ 7	$ 14	$ 7	$ 14					$ 851,841	$ 851,841	$ (66,853)	$ (66,853)	$ 785,009	$ 785,009	$ 1,545,905	$ 1,545,905				$ 1,545,905	785,009
Balance (in Shares) at Dec. 31, 2023	71,277,906	141,787,429	71,277,906	141,787,429
Balance at Jun. 08, 2023								$ 1				(98,966)		(98,965)				$ 356,318			356,318
Balance (in Shares) at Jun. 08, 2023							2,500	8,625,000										34,500,000
Sponsor forfeiture of RONI Class B ordinary shares and reservation of earnout shares
Sponsor forfeiture of RONI Class B ordinary shares and reservation of earnout shares (in Shares)								(1,986,775)
Redemption of Class A ordinary shares by RONI public shareholders																		$ (218,983)			(218,983)
Redemption of Class A ordinary shares by RONI public shareholders (in Shares)																		(21,195,224)
Redemption of Class A Common Stock										53,607				53,607		(53,607)					(53,607)
Redemption of Class A Common Stock (in Shares)			3,868,618	(3,868,618)
Conversion of RONI Class A and Class B ordinary shares into NET Power Inc. Class A and Class B Common Stock, respectively			$ 1	$ 1				$ (1)		60,045				60,046		87,094		$ (137,335)			(50,241)
Conversion of RONI Class A and Class B ordinary shares into NET Power Inc. Class A and Class B Common Stock, respectively (in Shares)			13,307,276	6,638,225			(2,500)	(6,638,225)										(13,304,776)
Issuance of RONI Class A Common Stock to PIPE investors			$ 6							540,445				540,451
Issuance of RONI Class A Common Stock to PIPE investors (in Shares)			54,044,995
Issuance of Class A Common Stock										27				27
Issuance of Class A Common Stock (in Shares)			54,278
Equity awards vested due to Business Combination				$ 1						542		(542)		1		109,639					109,639
Equity awards vested due to Business Combination (in Shares)				8,356,635
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders				$ 12						(940)		75,711		74,783		1,677,546					1,677,546
Issuance of RONI Class B Common Stock to former NET Power, LLC unitholders (in Shares)				129,822,703
Exercise of Warrants										47				47
Exercise of Warrants (in Shares)			2,739
Distributions to members																(181)					(181)
Tax Receivable Agreement, net of deferred taxes										(936)				(936)
Vesting of Earnout Shares																9,055					9,055
Amortization of share-based payments										765				765		13,358					13,358
Amortization of share-based payments (in Shares)				838,484
Adjustment of redeemable non-controlling interest to redemption value										198,239				198,239		(198,239)					(198,239)
Net loss																					(141,816)
Comprehensive loss												(43,056)		(43,056)		(98,760)					(98,760)
Balance at Dec. 31, 2023	$ 7	$ 14	$ 7	$ 14					$ 851,841	851,841	$ (66,853)	(66,853)	$ 785,009	785,009	$ 1,545,905	1,545,905				1,545,905	785,009
Balance (in Shares) at Dec. 31, 2023	71,277,906	141,787,429	71,277,906	141,787,429
Redemption of Class A Common Stock										74				74		(74)
Redemption of Class A Common Stock (in Shares)			679,559	(679,559)
Issuance of Class A Common Stock										4,032				4,032		(4,005)
Issuance of Class A Common Stock (in Shares)			12,587
Tax Receivable Agreement, net of deferred taxes										(567)				(567)
Unrealized gain on investments														224		438			224	662
Amortization of share-based payments										647				647		5,622
Amortization of share-based payments (in Shares)				693,941
Adjustment of redeemable non-controlling interest to redemption value										(118,225)				(118,225)		118,225
Net loss												(11,421)		(11,421)		(30,211)				(41,632)	(41,632)
Comprehensive loss																				$ 662
Balance at Mar. 31, 2024			$ 7	$ 14						$ 737,802		$ (78,274)		$ 659,773		$ 1,635,900			$ 224		$ 659,773
Balance (in Shares) at Mar. 31, 2024			71,970,052	141,801,811

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Members’ Equity (Unaudited) - USD ($) $ in Thousands	Total	Member Interests	Additional Paid-in- Capital	Accumulated Other Comprehensive Income	Accumulated Deficit
Balance at Dec. 31, 2021	$ 67,508	$ 227,960	$ 9,275	$ 20	$ (169,747)
Balance (in Shares) at Dec. 31, 2021		3,555,553
Issuance of shares to:
BHES	30,000	$ 30,000
BHES (in Shares)		142,180
(Less equity issuance costs)	(533)	$ (533)
BHES (Bonus shares)	9,858	$ 3,756	6,102
BHES (Bonus shares) (in Shares)		17,799
BHES (In-kind shares)	2,764	$ 1,439	1,325
BHES (In-kind shares) (in Shares)		6,823
Vesting of profits interests	9,586		9,586
Comprehensive loss	(54,781)			(3)	(54,778)
Balance at Dec. 31, 2022	$ 64,402	$ 262,622	26,288	17	(224,525)
Balance (in Shares) at Dec. 31, 2022	3,722,355	3,722,355
Issuance of shares to:
Occidental Petroleum	$ 1,859	$ 1,859
Occidental Petroleum (in Shares)		5,824
Constellation	9,181	$ 9,181
Constellation (in Shares)		28,764
BHES (Bonus shares)	2,688		2,688
BHES (In-kind shares)	1,943	$ 1,325	618
BHES (In-kind shares) (in Shares)		6,281
Vesting of profits interests	1,747		1,747
Comprehensive loss	(17,067)				(17,067)
Balance at Mar. 31, 2023	64,753	$ 274,987	31,341	17	(241,592)
Balance (in Shares) at Mar. 31, 2023		3,763,224
Balance at Dec. 31, 2022	$ 64,402	$ 262,622	26,288	17	(224,525)
Balance (in Shares) at Dec. 31, 2022	3,722,355	3,722,355
Issuance of shares to:
Occidental Petroleum	$ 11,859	$ 11,859
Occidental Petroleum (in Shares)		37,152
Constellation	9,181	$ 9,181
Constellation (in Shares)		28,764
BHES (Bonus shares)	4,690		4,690
BHES (In-kind shares)	3,903	$ 3,269	634
BHES (In-kind shares) (in Shares)		15,491
Vesting of profits interests	2,864		2,864
Comprehensive loss	(34,176)				(34,176)
Balance at Jun. 07, 2023	$ 62,723	$ 286,931	$ 34,476	$ 17	$ (258,701)
Balance (in Shares) at Jun. 07, 2023		3,803,762

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net loss after tax	$ (41,632)	$ (17,067)	$ (34,176)		$ (141,816)	$ (141,816)	$ (54,778)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	3,176	3,268	5,700	$ 7,146	7,146		13,149
Amortization	16,812	5	9		37,735		22
Accretion	43	59	102		93		215
Non-cash interest expense			30				4,710
Non-cash lease expense	113	33	59		200
Loss on disposal of property, plant and equipment					7
Conversion of equity awards					86,585
Allowance for doubtful accounts			352
Deferred taxes	(4,039)				(5,707)
Change in fair value of Earnout Shares liability	476				(1,378)
Change in fair value of Warrant liability	14,101				(26,270)
Vesting of profits interests		1,745	2,864				9,586
Vesting of Earnout Shares					1,118
Share-based compensation	6,269	4,632	8,593		14,122		12,622
Changes in operating assets and liabilities:
Accounts receivables	58	289			(58)		(301)
Interest receivable	1,396				(1,942)
Prepaid expenses	276	(252)	(453)		(1,140)		470
Other current assets	(46)	(629)	1,765		38		(1,795)
Accounts payable	2,078	95	1,768		(1,957)		(1,137)
Accrued liabilities	(1,820)	1,033	(384)		(5,249)		752
Lease liabilities	(84)	(31)	(55)		(48)
Option liability		31
Due to related parties – current	160	3,857	5,414		142		(2,357)
Due to related parties – long-term		(2,212)	(2,211)				2,212
Net cash used in operating activities	(2,663)	(5,144)	(10,623)		(38,379)		(16,630)
Cash flows from investing activities
Cash acquired as part of Business Combination					7,948
Purchase of short-term investments					(100,000)
Purchases of available-for-sale securities	(96,148)
Purchase of property, plant and equipment	(9,521)	(615)	(2,431)		(9,217)		(115)
Net cash used in investing activities	(105,669)	(615)	(2,431)		(101,269)		(115)
Cash flows from financing activities
Repurchase of redeemed Class A Ordinary Shares					(218,983)
Issuance of Class A Common Stock, including exercise of Warrants					74
Distributions to members					(181)
Proceeds from PIPE financing, net of issuance costs					540,451
Issuance of equity under JDA as a result of Business Combination					9,917
Payment of transaction expenses					(11,722)
Member loan proceeds							2,000
Member loan repayments							(10,000)
Proceeds from share issuances		5,836	15,836				30,000
Equity issuance costs							(533)
Net cash provided by financing activities		5,836	15,836		319,556		21,467
Net (decrease) increase in cash and cash equivalents	(108,332)	77	2,782		179,908		4,722
Effect of foreign currency exchange rate changes on cash							(3)
Cash and cash equivalents, beginning of period	536,927	5,164	5,164	7,946	357,019	5,164	445
Cash and cash equivalents, end of period	428,595	5,241	7,946	$ 536,927	536,927	$ 536,927	5,164
Non-cash investing activities:
Liabilities recorded for property, plant, and equipment, net	$ 1,721	$ 26
Supplemental disclosures of cash flow information
Cash paid for interest							81
Remeasurement of lease liabilities and right-of-use assets due to lease modification (Note 13)					$ 1,472

Nature of Business and Basis of

Nature of Business and Basis of Presentation	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Nature of Business and Basis of Presentation [Abstract]
Nature of Business and Basis of Presentation	NOTE 1 — Nature of Business and Basis of Presentation Nature of Business NET Power Inc. (the “Company”) is a clean energy technology company that has developed a proprietary process for producing electricity using a predominantly carbon dioxide working fluid that involves the capture and reuse, sale and sequestration of carbon dioxide (the “NET Power Cycle”). The NET Power Cycle is the subject of U.S. and foreign patents, as well as additional applications and provisional applications on file with the United States Patent and Trademark Office and international patent authorities. Business Combination On December 13, 2022, NET Power, LLC entered into a Business Combination Agreement with Rice Acquisition Corp. II (“RONI”), Rice Acquisition Holdings II LLC (“RONI OpCo”), Topo Buyer Co, LLC (“Buyer”) and Topo Merger Sub, LLC (“Merger Sub”). On June 8, 2023 (the “Closing Date”), Merger Sub merged with and into NET Power, LLC, with NET Power, LLC continuing as the surviving entity, resulting in it becoming a majority -owned -C OpCo is a variable interest entity (“VIE”) in accordance with the guidance in Accounting Standards Codification (“ASC”) Topic 810, Consolidation -down -down As a result of the Business Combination, the Company’s financial statement presentation distinguishes NET Power, LLC as the “Predecessor” through June 7, 2023 (the “Predecessor Period”) and NET Power Inc. as the “Successor” for periods beginning on or after the Closing Date (the “Successor Period”). Revenue and earnings after the date of the Business Combination are shown in the Successor Period on the condensed consolidated statements of operations and comprehensive loss. As a result of the application of the acquisition method of accounting in the Successor Period, the consolidated financial statements for the Successor Period are presented on a full step -up -up The condensed consolidated financial statements include the accounts of subsidiaries that NET Power Inc. consolidated according to the rules set forth in ASC 810. The Company consolidates all wholly -owned -owned Basis of Presentation The accompanying unaudited condensed consolidated financial statements included in this Quarterly Report on Form 10 -Q In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements for the year ended December 31, 2023 and include all adjustments, which consist of only normal and recurring adjustments, necessary for fair statement. The results reported in these unaudited condensed consolidated financial statements are not necessarily indicative of the results to be expected for the entire year. These unaudited condensed consolidated financial statements should be read in conjunction with the annual financial statements and notes thereto included in our Annual Report on Form 10 -K	NOTE 1 — Organization and Operations Background NET Power Inc. (the “Company”) is a clean energy technology company that has developed a proprietary process for producing electricity using a predominantly carbon dioxide working fluid that involves the capture and reuse, sale and sequestration of carbon dioxide (the “NET Power Cycle”). The NET Power Cycle is the subject of U.S. and foreign patents, as well as additional applications and provisional applications on file with the United States Patent and Trademark Office and international patent authorities. Business Combination On December 13, 2022, NET Power, LLC entered into a Business Combination Agreement with Rice Acquisition Corp. II (“RONI”), Rice Acquisition Holdings II LLC (“RONI OpCo”), Topo Buyer Co, LLC (“Buyer”) and Topo Merger Sub, LLC (“Merger Sub”). On June 8, 2023 (the “Closing Date”), Merger Sub merged with and into NET Power, LLC, with NET Power, LLC continuing as the surviving entity, resulting in it becoming a majority -owned -C OpCo is a variable interest entity (“VIE”) in accordance with the guidance in Accounting Standards Codification (“ASC”) Topic 810, Consolidation -down -down As a result of the Business Combination, the Company’s financial statement presentation distinguishes NET Power, LLC as the “Predecessor” through June 7, 2023 (the “Predecessor Period”) and NET Power Inc. as the “Successor” for periods after the Closing Date (the “Successor Period”). Revenue and earnings after the date of the Business Combination are shown in the Successor Period on the consolidated statement of operations and comprehensive loss. As a result of the application of the acquisition method of accounting in the Successor Period, the consolidated financial statements for the Successor Period are presented on a full step -up -up Reference Note 3 for further discussion of the Business Combination. Basis of Presentation The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”). Certain prior period amounts have been reclassified to conform to current period presentation. The consolidated financial statements include the accounts of subsidiaries that NET Power Inc. consolidated according to the rules set forth in ASC 810. The Company consolidates all wholly -owned -owned

Significant Accounting Policies

Significant Accounting Policies	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Significant Accounting Policies [Abstract]
Significant Accounting Policies	NOTE 2 — Significant Accounting Policies In the opinion of the Company’s management, the Company’s significant accounting policies used for the three months ended March 31, 2024, unless otherwise noted below are consistent with those used for the fiscal year ended December 31, 2023. Accordingly, reference Note 2 to the consolidated financial statements in the Company’s Annual Report on Form 10 -K Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make certain estimates, judgments and assumptions. The estimates, judgments and assumptions made by the Company when accounting for items and matters such as, but not limited to, depreciation, amortization, asset valuations and share -based Reclassification Certain immaterial prior period amounts have been reclassified to conform to current period presentation. Accounting Standards Not Yet Adopted During December 2023, the Financial Accounting Standards Board issued ASU 2023 -09 Income Taxes (Topic 740) Improvements to Income Tax Disclosures -09 -09 -09 -to-date -09 -09 -09 -09 -09	NOTE 2 — Significant Accounting Policies Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions. The Company believes that the estimates, judgments and assumptions made when accounting for items and matters such as, but not limited to, depreciation, amortization, asset valuations and share -based Business Combinations The Company applies the guidance within ASC Topic 805, Business Combinations The Company applies the acquisition method for all transactions and other events through which the Company obtains control over one or more other businesses, including the Business Combination (Note 3). Under the acquisition method, assets acquired and liabilities assumed are measured at fair value as of the acquisition date. Liabilities related to contingent consideration are recognized on the acquisition date and remeasured at fair value in each subsequent reporting period, if the contingent consideration is liability classified. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net identifiable assets acquired. Segment Reporting In accordance with ASC Topic 280 — Segment Reporting Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts The Company follows the guidance within ASC Topic 606, Revenue from Contracts with Customers The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled. When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities. Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326, Current Expected Credit Losses -offs Fair Value Certain assets and liabilities are carried at fair value in accordance with ASC Topic 820, Fair Value Measurement • • • Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of any input that is significant to the fair value measurement. The Company’s estimates of fair values are based upon assumptions believed to be reasonable, but which are uncertain and involve significant managerial judgments made by considering factors specific to the asset or liability. The determination of fair value requires more judgment to the extent the valuation is based on models or inputs that are less observable or unobservable in the market. Accordingly, the degree of judgment exercised by the Company in determining the fair value is greatest for instruments categorized as Level 3. The Company’s recurring fair value measurements comprise the Private Placement Warrants, the Public Warrants, the Earnout Shares (as defined in Note 11) and short -term Cash and Cash Equivalents Cash consists of liquid deposits at banking institutions that are members of the Federal Deposit Insurance Corporation (“FDIC”). FDIC guidelines guarantee $250 per depositor, per insured bank. As of December 31, 2023 (Successor) and December 31, 2022 (Predecessor), the Company held cash in excess of FDIC limits equal to $334,289 and $4,644 respectively. As defined within ASC Topic 230, Statement of Cash Flows -term The carrying value of cash and cash equivalents equals its fair value. Short-Term Investments The Company classifies investments with maturities greater than three months but less than one year as short -term -term -month Short -term -to-maturity Investments — Debt Securities -term -term Investments in Securities In accordance with ASC 320, the Company classifies investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Held -to-maturity -for-sale -credit The primary objectives of the Company’s investment portfolio are to maintain the safety of invested capital, provide prudent levels of liquidity to accommodate operational and capital needs and maintain an acceptable level of risk. These risks include credit risk, interest rate risk and concentration risk, which are mitigated through the creation of a diversified investment portfolio consisting of liquid and high credit quality financial instruments. As required by ASC Topic 326, Financial Instruments — Credit Losses -for-sale -offs -for-sale The Company did not hold any investments in securities as of either December 31, 2023 (Successor) or December 31, 2022 (Predecessor), respectively. Warrants The Company issued Public Warrants and Private Placement Warrants (as defined in Note 3) prior to the consummation of the Business Combination. The Company accounts for both the Public Warrants and Private Placement Warrants as liability -classified Distinguishing Liabilities from Equity Derivatives and Hedging classification under ASC 815 and whether class of equity into which the Warrants settle possess substantive voting rights. This assessment is conducted at the time of the instruments’ issuance and at each subsequent quarterly period end date while the Warrants remain outstanding. In compliance with ASC 815, the Company accounts for the outstanding Warrants as a liability at fair value on the consolidated balance sheets. The Warrants are subject to remeasurement at each reporting date with any change in the fair value recognized in Change in Earnout Shares liability and Warrant liability on the Company’s consolidated statement of operations and comprehensive loss. Tax Receivable Agreement Liability As part of the Business Combinations, the Company entered into the Tax Receivable Agreement (“TRA”) with certain OpCo unitholders that will represent approximately 75% of the calculated tax savings based on the portion of basis adjustments on exchanges of OpCo units and other carryforward attributes that are anticipated to be able to be utilized in future years. Such tax attributes include the existing tax basis of certain assets of OpCo and its consolidated subsidiaries; tax basis adjustments resulting from taxable exchanges of Class A OpCo Units; certain tax benefits realized by NET Power Inc. as a result of the Business Combination and tax deduction in respect of portions of certain TRA payments. All such payments made under the terms of the TRA are the obligations of NET Power Inc. and not of OpCo. Reference Note 15 for additional information about the TRA Liability. Intangible Assets The Company accounts for definite -lived Goodwill and Other Intangible Assets -year Goodwill The Company recognizes goodwill in accordance with ASC 350. Goodwill represents the excess costs of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. The Company’s goodwill is not tax deductible. Goodwill is not amortized but is tested annually for impairment. The Company assesses its goodwill value for impairment annually as of October 1. Impairment exists when the carrying amount of the reporting unit exceeds its fair value and an impairment loss is recognized. The Company determined that no impairment charges for goodwill were required to be recognized during the period ended December 31, 2023. Prepaid Expenses Prepaid expenses consist of costs paid in advance for software and other subscriptions, patent renewal fees, general liability insurance and employee health insurance. Property, Plant and Equipment Property, plant and equipment is generally recorded at the historical cost to acquire the assets. The costs bases of property, plant and equipment to which the Company held title prior to the Business Combination (Note 3) were stepped -up Depreciation is calculated on the straight -line Asset Classification Useful Life Furniture and Equipment 4 – 7 Demonstration Plant 7 Property, plant and equipment is presented at cost less accumulated depreciation on the consolidated balance sheets. Impairment of Long-Lived Assets In accordance with ASC Topic 360, Property, Plant and Equipment Leases Lease agreements may fall within two categories according to ASC Topic 842, Leases -of-use -term -of-use -lease -of-use Asset Retirement Obligation The Company recognizes liabilities for future obligations associated with the retirement of assets. The fair values of legal obligations to retire and remove long -lived -date seven -year Net Loss per Unit During the Predecessor Period, the Company computed basic net loss per unit by dividing the total net loss applicable to membership interest holders by the weighted average number of membership interests outstanding during the period. The Company computed diluted net loss per unit by dividing the net loss applicable to membership interest holders by the sum of the weighted -average -dilutive -dilutive Net Loss per Share During the Successor Period, basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net loss 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. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares (as defined in Note 11), restricted stock units and conversion of OpCo Units are excluded from the calculation for the period from June 8, 2023 through December 31, 2023 (Successor), as the inclusion would be anti -dilutive Share Based Compensation The Company applies ASC Topic 718, Share -Based Payments -based -based -cash -based -line -based Prior to the Business Combination, equity awards granted to employees included unvested membership units in NET Power, LLC. The estimated fair value of NET Power, LLC membership units was determined by an independent, external valuation service provider at each equity grant date until the Closing Date, upon which the Company became publicly traded. On the Closing Date, the Company fair valued the OpCo Units used to satisfy outstanding share -based Earnout Shares and Restricted Shares Unvested Earnout Shares (as defined in Note 11) are reported as liabilities on the Company’s consolidated balance sheets. The liability classification reflects the interpretation that the Earnout Share settlement provision contingent on a change in control event does not represent an input into a fixed -for-fixed -for-fixed The Price Based Lockup Shares and the Time -Based Non-Controlling Interest Non -controlling Units (Note 11). After evaluating Class A OpCo Unit redemption rights under ASC 480, the Company determined that Class A OpCo Units are subject to potential cash redemption that rests outside the Company’s control. The Company has classified NCI as a component of mezzanine equity in consideration of this cash redemption feature and in accordance with the guidance in ASC 810. The Company measures redeemable NCI each quarter at the higher of its book value or its redemption value, which equals the closing price of the Company’s Class A Common Stock on the measurement date. As of December 31, 2023 (Successor), the book value was higher than the redemption value of non -controlling -Controlling -controlling The Company’s net loss before income tax and the non -tax -tax -controlling Research and Development Costs The Company expenses costs related to operations and testing at the Demonstration Plant, as well as engineering and design costs related to development of the NET Power Cycle as incurred. These costs are included in Research and development expense on the consolidated statement of operations and comprehensive loss. Related Parties The Company applies ASC Topic 850, Related Parties The Company has entered into contractual relationships with several of its current shareholders and former members that qualify as related parties according to the aforementioned criteria. These relationships include loans from members and master service agreements (“MSA’s”). Reference Note 8 for additional information. Income Taxes The Company applies the guidance set forth in ASC Topic 740, Income Taxes -likely-than-not NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass -through -through -through Recently Adopted Accounting Standards During November, 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023 -07 Segment Reporting (Topic 280) Improvements to Reportable Segment Disclosures -07 -07 and annual financial statements: significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss; an amount for other segment items, which comprise segment revenue less segment expenses and measures of segment profit or loss by reportable segment, and a description of their compositions; additional measures of segment profit, subject to qualifications, if the CODM uses more than one measure of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources; and the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. ASU 2023 -07 -07 The Company incorporated ASU 2023 -07 Accounting Standards Not Yet Adopted During October, 2023, the FASB issued ASU 2023 -06 Disclosure Improvements: Codification Amendments in Response to the SEC s Disclosure Update and Simplification Initiative -06 -06 -10532 Disclosure Update and Simplification into various topics within the Accounting Standards Codification -06 -06 During December, 2023, the FASB issued ASU 2023 -09 Income Taxes (Topic 740) Improvements to Income Tax Disclosures -09 -09 -09 -to-date -09 -09 -09 -09 -09

Business Combination

Business Combination	12 Months Ended
	Dec. 31, 2023
Business Combination [Abstract]
Business Combination	NOTE 3 — Business Combination RONI, a Cayman Islands exempted company, was organized as a blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. On June 18, 2021, RONI completed its IPO, generating gross proceeds of approximately $345,000. The net proceeds from the IPO were subsequently placed in a trust account for the intended purpose of consummating a business combination. As discussed in Note 1, the Business Combination was consummated on June 8, 2023. The result of the Business Combination generated the following financial results: • -the-line • -combination • -combination • • • -trading -whole five • five -redeemable • • The Business Combination was accounted for using the acquisition method of accounting. The fair value of the total purchase consideration transferred was $1,786,259. The following table summarizes the total consideration transferred in the Business Combination: Consideration Transferred Total Pre-combination vesting of modified profits interests $ 325 Pre-combination vesting of unmodified profits interests 651 Consideration transferred to sellers 976 Class A OpCo Units – non-controlling interests 1,785,283 Fair value of total consideration transferred $ 1,786,259 The following table sets forth the fair value of the assets and liabilities assumed in connection with the Business Combination: Total Assets acquired Current assets Cash $ 7,946 Prepaid expenses 637 Other current assets 30 Total current assets 8,613 Long-term assets Intangible assets, net 1,345,000 Property, plant and equipment 91,855 Right-of-use assets 940 Total long-term assets 1,437,795 Total assets acquired $ 1,446,408 Liabilities assumed Current liabilities Accounts payable $ 2,574 Accrued liabilities 7,370 Current lease liability 137 Other current liabilities 1 Total current liabilities 10,082 Long-term liabilities Deferred tax liability 71,426 Asset retirement obligation 1,967 Long-term lease liability 594 Total long-term liabilities 73,987 Total liabilities assumed 84,069 Total identifiable net assets 1,362,339 Goodwill 423,920 Net assets acquired $ 1,786,259 The following methodologies were used to estimate the fair value of the acquired assets and liabilities: • • -period • The purchase price allocation is subject to change upon finalizing the tax returns for the year ended December 31, 2023 (Successor), which the Company expects to occur prior to the one year anniversary of the acquisition date. Unaudited Pro-Forma Information The following table presents unaudited pro forma information as if the Business Combination occurred as of January 1, 2022 (Predecessor). The unaudited pro forma information reflects adjustments for additional amortization resulting from the fair value re -measurement Year Ended December 31, 2023 2022 Pro forma revenue $ 175 $ 580 Pro forma net loss $ (205,387 ) $ (121,652 ) Pro forma net loss attributable to non-redeemable controlling interest $ (67,778 ) $ (40,145 ) Pro forma net loss attributable to non-redeemable non-controlling interests $ (137,609 ) $ (81,507 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets [Abstract]
Goodwill and Intangible Assets	NOTE 3 — Goodwill and Intangible Assets Goodwill Goodwill represents the future economic benefits derived from the Company’s unique market position, the growth attributable to the NET Power Cycle and the Company’s assembled workforce, none of which are individually and separately recognized as intangible assets. Goodwill is allocated to the Company’s sole reportable segment and reporting unit. The following table presents the Company’s goodwill included in the condensed consolidated balance sheets: Goodwill at December 31, 2023 (Successor) $ 423,920 Measurement Adjustments — Goodwill at March 31, 2024 (Successor) $ 423,920 Current period measurement adjustments calculated as part of the purchase price allocation that accompanied the Business Combination are still pending finalization of the annual income tax return for the year ended December 31, 2023. Definite Lived Intangible Assets The following tables summarize the Company’s definite lived intangible assets included in the condensed consolidated balance sheets: March 31, December 31, Developed technology, gross $ 1,345,000 $ 1,345,000 Accumulated amortization (54,547 ) (37,735 ) Developed technology, net $ 1,290,453 $ 1,307,265 Amortization expense for the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor) was $16,812 and $5, respectively. The Company does not own or control any intangible assets with indefinite useful lives except goodwill. The following table presents estimated amortization expense for the next five years and thereafter: Remainder of 2024 $ 50,438 2025 67,250 2026 67,250 2027 67,250 2028 67,250 2029 67,250 2030 and thereafter 903,765 Total $ 1,290,453	NOTE 4 — Goodwill and Intangible Assets Goodwill Goodwill represents the future economic benefits derived from the Company’s unique market position, the growth attributable to the NET Power Cycle and the Company’s assembled workforce, none of which are individually and separately recognized as intangible assets. Goodwill is allocated to the Company’s sole reportable segment and reporting unit. The following table presents the Company’s goodwill balance as of December 31, 2023 (Successor): Goodwill at June 8, 2023 (Successor) $ 433,736 Measurement Adjustments (9,816 ) Goodwill at December 31, 2023 (Successor) $ 423,920 Current period measurement adjustments of $9,816 reflect the effects of changes to deferred tax liability estimates calculated as part of the purchase price allocation that accompanied the Business Combination. Definite Lived Intangible Assets The following tables present the Company’s definite lived intangible assets as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows: December 31, December 31, Developed technology, gross $ 1,345,000 $ 604 Accumulated amortization (37,735 ) (341 ) Developed technology, net $ 1,307,265 $ 263 Amortization expense for the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through December 31, 2023 (Successor) was $9 and $37,735, respectively. Amortization expense for the year ended December 31, 2022 (Predecessor) was $22. Periodic amortization expense excludes expenses attributable to goodwill, which is not amortized. The Company does not own or control any intangible assets with indefinite useful lives except goodwill. The following table presents estimated amortization expense for the next five years and thereafter: 2024 $ 67,250 2025 67,250 2026 67,250 2027 67,250 2028 67,250 2029 and thereafter 971,015 Total $ 1,307,265

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Member]
Property, Plant and Equipment	NOTE 4 — Property, Plant and Equipment The following table summarizes the key classifications of property, plant and equipment included in the condensed consolidated balance sheets: March 31, December 31, Furniture and equipment, gross $ 328 $ 320 Demonstration Plant, gross 89,239 89,239 Construction in progress 21,853 14,443 Total property, plant and equipment, gross 111,420 104,002 Accumulated depreciation (10,321 ) (7,146 ) Total property, plant and equipment, net $ 101,099 $ 96,856 Depreciation expense for the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor) was $3,176 and $3,268, respectively.	NOTE 5 — Property, Plant and Equipment The following table summarizes the key classifications of property, plant and equipment as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor): December 31, December 31, Furniture and equipment, gross $ 320 $ 368 Demonstration Plant, gross 89,241 128,013 Construction in progress 14,441 — Total property, plant and equipment, gross 104,002 128,381 Accumulated depreciation (7,146 ) (58,786 ) Total property, plant and equipment, net $ 96,856 $ 69,595 Depreciation expense for the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through December 31, 2023 (Successor) was $5,700 and $7,146, respectively. Depreciation expense for the year ended December 31, 2022 (Predecessor) was $13,149.

Accrued Liabilities

Accrued Liabilities	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accrued Liabilities [Abstract]
Accrued Liabilities	NOTE 5 — Accrued Liabilities Accrued liabilities consist of the following components included in the condensed consolidated balance sheets: March 31, December 31, Accrued incentive compensation $ 819 $ 2,016 Accrued cash-based expense of BHES JDA 3,438 3,669 Accrued legal service provider fees 241 160 Accrued capital expenditures 1,721 3,605 Other accrued liabilities 992 1,465 Total accrued liabilities $ 7,211 $ 10,915	NOTE 6 — Accrued Liabilities Accrued liabilities as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows: December 31, 2023 December 31, 2022 Accrued incentive compensation $ 2,016 $ 1,451 Accrued cash-based expense of BHES JDA 3,669 — Accrued legal service provider fees 160 713 Accrued capital expenditures 3,605 — Other accrued liabilities 1,465 228 Total accrued liabilities $ 10,915 $ 2,392

Revenue and Accounts Receivable

Revenue and Accounts Receivable	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Revenue and Accounts Receivable [Abstract]
Revenue and Accounts Receivable	NOTE 6 — Revenue and Accounts Receivable Revenue The following table disaggregates the revenue included in the condensed consolidated statements of operations and comprehensive loss into its major components: Three months ended March 31, March 31, Feasibility studies $ — $ 50 Test data sales — — Testing services — — Total revenue $ — $ 50 Performance Obligations Revenue recognized under contracts with customers exclusively includes the performance obligations satisfied in the applicable reporting period. Accounts Receivable Accounts receivable, net consist of the following balances included in the condensed consolidated balance sheets: March 31, December 31, Accounts receivable, gross $ — $ 58 Allowance for credit losses — — Accounts receivable, net $ — $ 58 During the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor), the Company did not	NOTE 7 — Revenue and Accounts Receivable Revenue The following table disaggregates the Company’s revenue streams into its major sub -components June 8 – January 1 – January 1 – Feasibility studies $ — $ 175 $ 125 Test data sales — — 150 Testing services — — 305 Total revenue $ — $ 175 $ 580 Feasibility studies revenue comprises studies conducted on behalf of potential licensees to determine the applicability of the NET Power Cycle to the counterparty’s specific use case. The Company’s performance obligations associated with feasibility studies are satisfied over time because the customer simultaneously receives and consumes the benefits as the Company delivers the relevant reports. The Company measures progress under these arrangements using an output method based on contract phases reached. Test data sales comprises the sale to potential licensees of access to testing results and other data associated with testing performed at the Demonstration Plant. The Company’s performance obligations associated with test data contracts are satisfied over time because the customer simultaneously receives and consumes the benefits as the Company performs. The Company measures progress under these arrangements using an output method based on contract phases reached. Testing services revenue comprised reimbursement of costs associated with the performance of testing on behalf of a customer at the Demonstration Plant. The Company’s performance obligations associated with testing services are satisfied over time because the grant recipient received the benefit simultaneous to the Company’s performance. The Company was compensated based on expenses incurred plus an administrative markup. The Company measured progress under this arrangement using an input method based on costs incurred. Expenses related to the project were recorded as Cost of revenue on the consolidated statement of operations and comprehensive loss and submitted for reimbursement with an administrative markup. Performance Obligations Revenue recognized under contracts with customers exclusively includes the performance obligations satisfied in the applicable reporting period and excludes all performance obligations satisfied in prior reporting periods. As of December 31, 2023 (Successor), the Company recorded no transaction prices allocated to open performance obligations. Accounts Receivable Accounts receivable, net as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) includes the following balances: December 31, 2023 December 31, 2022 Accounts receivable, gross $ 58 352 Allowance for doubtful accounts — — Accounts receivable, net $ 58 $ 352 During the period from January 1, 2023 through June 7, 2023 (Predecessor), the Company recorded bad debt expense associated with its accounts receivables equal to $352 within General and administrative expense on the consolidated statement of operations and comprehensive loss, respectively. During the periods from June 8, 2023 through December 31, 2023 (Successor) and the year ended December 31, 2022 (Predecessor), the Company did not record any bad debt expense associated with its accounts receivable.

Related Party Transactions

Related Party Transactions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Related Party Transactions [Abstract]
Related Party Transactions	NOTE 7 — Related Party Transactions The following table summarizes the related party amounts included in the condensed consolidated balance sheets: March 31, December 31, Amounts due to related parties under master services agreements $ 302 $ 142 The following table summarizes the related party transactions included in the condensed consolidated statements of operations and comprehensive loss: Three months ended March 31, March 31, Master services agreement administrative costs $ 26 $ 34 Engineering support provided by former board member — 76 General and administrative – related party $ 26 $ 110 Master services agreement costs for Demonstration Plant $ 267 $ 278 BHES JDA — 6,186 Research and development – related party $ 267 $ 6,464 Master Services Agreements A significant shareholder has provided the Company with marketing services, patent administration services and technology maintenance services related to the development of the NET Power Cycle. The total cost incurred for these services was $26 and $34 during the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor), respectively. These totals are included in General and administrative — related party on the condensed consolidated statements of operations and comprehensive loss. Another shareholder supports the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $267 and $278 during the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor), respectively. These totals are reflected in Research and development — related party on the condensed consolidated statements of operations and comprehensive loss. The Company had $302 and $142 in current liabilities payable to related parties as of March 31, 2024 (Successor) and March 31, 2023 (Predecessor), respectively, on the condensed consolidated balance sheets related to these services. These related party payables are unsecured and are due on demand. Engineering Support Provided by Former Board Member A shareholder, who is also a former board member, supported the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $76 during the three months ended March 31, 2023 (Predecessor). These expenses are reflected in Research and development — related party on the condensed consolidated statements of operations and comprehensive loss prior to the Business Combination. The counterparty ceased being a related party on June 8, 2023 upon completion of the Business Combination. BHES JDA The Baker Hughes Energy Services LLC Amended and Restated Joint Development Agreement (the “BHES JDA”) is discussed in more detail in Note 14. Transactions under the BHES JDA are included in Research and development — related party on the condensed consolidated statements of operations and comprehensive loss prior to the Business Combination. Subsequent to the Business Combination, transactions under the BHES JDA are included in Research and development on the condensed consolidated statements of operations and comprehensive loss because Baker Hughes Company ceased being a related party on June 8, 2023. Lease Reference Note 13 — Leases for a discussion of the OXY lease.	NOTE 8 — Related Party Transactions The following table summarizes the related party amounts on the consolidated balance sheets: December 31, 2023 December 31, 2022 Amounts due to related parties under MSA $ 142 $ 178 Due to related parties – current $ 142 $ 178 Amounts due to related parties under BHES JDA $ — $ 2,212 Due to related parties – long-term $ — $ 2,212 The following table summarizes the related party amounts on the consolidated statement of operations and comprehensive loss for the periods presented: June 8 – January 1 – January 1 – MSA costs related to testing services $ — $ — $ 86 Cost of revenue – related party $ — $ — $ 86 MSA administrative costs $ 84 $ 79 $ 247 Engineering support provided by former board member — 97 230 Engineering services provided by former investor — — 27 General and administrative – related party $ 84 $ 177 $ 504 MSA costs for Demonstration Plant $ 643 $ 530 $ 984 BHES JDA — 11,713 14,833 Research and development – related party $ 643 $ 12,243 $ 15,817 Option settlement – related party $ 79,054 $ — $ — MSA A significant shareholder has provided the Company with marketing services, patent administration services and technology maintenance services related to the development of the NET Power Cycle. The total cost incurred for these services was $79 and $84 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through December 31, 2023 (Successor), respectively. The total cost incurred for these services was $247 during the year ended December 31, 2022 (Predecessor). These totals are included in General and administrative — related party on the consolidated statement of operations and comprehensive loss. Another shareholder supports the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $530 and $643 during the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through December 31, 2023 (Successor), respectively. The total cost incurred for these services was $984 during the year ended December 31, 2022 (Predecessor). These totals are reflected in Research and development — related party on the consolidated statement of operations and comprehensive loss. The Company had $142 and $178 in current liabilities payable to related parties as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor), respectively, on the consolidated balance sheets related to these services. These related party payables are unsecured and are due on demand. Engineering Support Provided by Former Board Member A shareholder who is also a former board member, supported the Company with regard to general business oversight and with the operation of the Demonstration Plant. The total cost incurred for these services was $97 during the period from January 1, 2023 through June 7, 2023 (Predecessor). The total cost incurred for these services was $230 for the year ended December 31, 2022 (Predecessor). These expenses are reflected in Research and development — related party on the consolidated statement of operations and comprehensive loss prior to the Business Combination. The counterparty ceased being a related party on June 8, 2023 upon completion of the Business Combination. BHES JDA Additionally, the Company has an agreement with a shareholder as discussed in Note 14. Transactions under the BHES JDA are included in Research and development — related party on the consolidated statement of operations and comprehensive loss prior to the Business Combination. Subsequent to the Business Combination, transactions under the BHES JDA are included in Research and development on the consolidated statement of shareholders’ equity and non -controlling -term Option Settlement One of the Company’s shareholders owned an option to purchase up to 711,111 membership interests from NET Power, LLC if NET Power, LLC met certain performance conditions, which it did not achieve prior to the close of the Business Combination. Immediately prior to the close of the Business Combination (Note 3), the option holder received 247,655 NET Power, LLC membership interests with a value of approximately $79,054 in exchange for retiring the purchase option. The membership interests converted into 7,905,279 Class A OpCo Units and a corresponding quantity of shares of Class B Common Stock in conjunction with the Business Combination. The loss generated from the settlement of the share purchase option is recorded as Option settlement — related party expense on the consolidated statement of operations and comprehensive loss.

Fair Value Measurements

Fair Value Measurements	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurements [Abstarct]
Fair Value Measurements	NOTE 9 — Fair Value Measurements The following table presents the assets and liabilities that the Company measures at fair value on a recurring basis included in the condensed consolidated balance sheets and indicates the level of the valuation inputs the Company utilized to determine each asset’s and each liability’s fair value: Level March 31, December 31, Assets Available-for-sale investments (1) 1 $ 96,983 $ — Short-term investments 2 100,000 100,000 Total assets $ 196,983 $ 100,000 Liabilities Public Warrants 1 $ 25,004 $ 18,969 Private Placement Warrants 3 45,017 36,951 Earnout Shares 3 2,147 1,671 Total liabilities $ 72,168 $ 57,591 ____________ (1) -term The following table contains a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements included in the condensed consolidated statements of operations and comprehensive loss: March 31, March 31, Balance of recurring level 3 liabilities at beginning of period $ 38,622 $ 5,174 Change in Earnout Shares liability and Warrant liability 8,542 — Payments — (5,174 ) Balance of recurring level 3 liabilities at end of period $ 47,164 $ — Earnout Shares The fair values for the Earnout Shares are estimated using a Monte Carlo simulation. The Monte Carlo simulation considers daily simulated stock prices as a proxy for the Company’s daily volume -weighted -free Warrants The Public Warrants are valued using their quoted and publicly available market prices. Since their fair value is predicated on quoted prices in an active market for identical instruments, the Public Warrants are considered to be level 1 fair value instruments. The Company uses a Black -Scholes -Scholes -free Short-term Investments Short -term -term Option Liability The Company’s option liability was issued in conjunction with member loans on October 15, 2021. The loans were fully repaid on February 3, 2022; however, the members had one	NOTE 9 — Fair Value Measurement The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of December 31, 2023 (Successor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each asset’s and each liability’s fair value: Assets Level 1 Level 2 Level 3 Total Short-term Investments $ — $ 100,000 $ — $ 100,000 Total $ — $ 100,000 $ — $ 100,000 Liabilities Level 1 Level 2 Level 3 Total Public Warrants $ 18,969 $ — $ — $ 18,969 Private Placement Warrants — — 36,951 36,951 Earnout Shares — — 1,671 1,671 Total $ 18,969 $ — $ 38,622 $ 57,591 The following table presents information about the Company’s liabilities that were measured at fair value on a recurring basis as of December 31, 2022 (Predecessor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine the liability’s fair value: Liabilities Level 1 Level 2 Level 3 Total Option Liability $ — $ — $ 5,174 $ 5,174 Total $ — $ — $ 5,174 $ 5,174 The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements: June 8 – January 1 – January 1 – Balance of recurring level 3 liabilities at beginning of $ 63,851 $ 5,174 $ 1,459 Change in Earnout Shares liability and Warrant liability (16,174 ) — — Change in Option liability — — 3,715 Issuances (9,055 ) — — Payments — (5,174 ) — Balance of recurring level 3 liabilities at end of period $ 38,622 $ — $ 5,174 Earnout Shares The fair values for the Earnout Shares are estimated using a Monte Carlo simulation. The Monte Carlo simulation considers daily simulated stock prices as a proxy for the Company’s daily volume -weighted -free Warrants The Public Warrants are valued using their quoted and publicly available market prices. Since their fair value is predicated on quoted prices in an active market for identical instruments, the Public Warrants are considered to be Level 1 fair value instruments because their price is observable. The Company uses a Black -Scholes -Scholes five Short-term Investments Short -term -term Please reference Note 3 for a description of the terms of the Warrants. Option Liability The Company’s option liability was issued in conjunction with member loans on October 15, 2021. The loans were fully repaid on February 3, 2022; however, the members had one year to exercise their options subsequent to the repayment of the loans. The interest expense related to these loan options was $30 during the period from January 1, 2023 through June 7, 2023 (Predecessor). These measurements were reported in Interest income (expense) on the consolidated statement of operations and comprehensive loss. In early 2023, two option holders exercised their options to purchase an aggregate of 34,588 membership units in NET Power, LLC for total proceeds of $5,836. There were no loan options outstanding at the time of the Business Combination.

Net Loss per Share_Unit

Net Loss per Share/Unit	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Net Loss per Share/Unit [Abstract]
Net Loss per Share/Unit	NOTE 10 — Net Loss per Share/Unit Successor Period For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, BHES Bonus Shares (as defined in Note 12), unvested Class A OpCo Units and the potential conversion of vested OpCo Units are excluded from the net loss per share calculation for the three months ended March 31, 2024 (Successor) because their inclusion would be anti -dilutive -dilutive Anti-Dilutive Instrument March 31, Public Warrants 8,622,235 Private Placement Warrants 10,900,000 Earnout Shares 328,925 BHES Bonus Shares 2,068,416 Unvested Class A OpCo Units 848,415 Vested Class A OpCo Units 141,274,719 Unvested RSU’s 504,421 Total 164,547,131 Only shares of Class A Common Stock participate in the Company’s undistributed earnings. As such, the Company’s undistributed earnings are allocated entirely to the Class A Common Stock based on the weighted -average The following table sets forth the computation of the Company’s basic and diluted net loss per share for the three months ended March 31, 2024 (Successor): Class A Numerator Net loss $ (41,632 ) Net loss attributable to shareholders $ (11,422 ) Denominator Weighted-average number shares outstanding, basic and diluted 71,895 Net loss per share attributable to shareholders, basic and diluted $ (0.16 ) Predecessor Period As of March 31, 2023 (Predecessor), the Company’s anti -dilutive -dilutive Anti-Dilutive Instrument March 31, Unvested profits interests 226,494 Member loan share options — Occidental Petroleum share options — Total 226,494 The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the three months ended March 31, 2023 (Predecessor): March 31, Numerator Net loss $ (17,067 ) Net loss attributable to membership interest holders $ (17,067 ) Denominator Weighted-average number membership interests outstanding, basic and diluted 3,748 Net loss per unit attributable to membership interest holders, basic and diluted $ (4.55 )	NOTE 10 — Net Loss per Share/Unit Successor Period Basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net income per share is computed based on the weighted average number of shares of Class A Common Stock outstanding, increased by the number of any additional shares of Class A Common Stock that would have been outstanding had any potentially dilutive shares of Class A Common Stock been issued and reduced by the number of shares of Class A Common Stock the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares, BHES Bonus Shares (as defined in Note 12), unvested Class A OpCo Units and the potential conversion of vested OpCo Units are excluded from the net loss per share calculation for the period from June 8, 2023 through December 31, 2023 (Successor) because their inclusion would be anti -dilutive on the amounts outstanding at December 31, 2023 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti -dilutive Anti-Dilutive Instrument December 31, Public Warrants 8,622,235 Private Placement Warrants 10,900,000 Earnout Shares 328,925 BHES Bonus Shares 2,068,416 Unvested Class A OpCo Units 848,415 Vested Class A OpCo Units 141,304,030 Unvested RSU’s 443,221 Total 164,515,242 Only shares of Class A Common Stock participate in the Company’s undistributed earnings. As such, the Company’s undistributed earnings are allocated entirely to the Class A Common Stock based on the weighted -average The following table sets forth the computation of the Company’s basic and diluted net loss per share for the period from June 8, 2023 through December 31, 2023 (Successor): Class A Numerator Net loss $ (141,816 ) Net loss attributable to shareholders $ (43,056 ) Denominator Weighted-average number shares outstanding, basic and diluted 69,756 Net loss per share attributable to shareholders, basic and diluted $ (0.62 ) Predecessor Period Basic net loss per unit is computed based on the weighted average number of membership interests outstanding. Diluted net loss per unit is computed based on the weighted average number of membership interests outstanding, increased by the number of any additional units that would have been outstanding had any potentially dilutive membership interests been issued and decreased by the number of membership interests the Company could have repurchased from the proceeds from issuance of the potentially dilutive membership interests. As of December 31, 2022 (Predecessor), the Company’s anti -dilutive -dilutive Anti-Dilutive Instrument December 31, June 7, Unvested profits interests 226,494 119,076 Member loan share options 34,588 — Occidental Petroleum share options 711,111 — Total 972,193 119,076 The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the period from January 1, 2023 through June 7, 2023 (Predecessor), and for the year ended December 31, 2022 (Predecessor), respectively: Period from Year Ended Numerator Net loss $ (34,176 ) $ (54,778 ) Net loss attributable to membership interest holders $ (34,176 ) $ (54,778 ) Denominator Weighted-average number membership interests outstanding, basic and diluted 3,767 3,703 Net loss per unit attributable to membership interest holders, basic and diluted $ (9.07 ) $ (14.79 )

Shareholders_ Equity and Non-Co

Shareholders’ Equity and Non-Controlling Interest	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Shareholders’ Equity and Non-Controlling Interest [Abstract]
Shareholders’ Equity and Non-Controlling Interest	NOTE 11 — Shareholders’ Equity and Non-Controlling Interest Successor Period The Company’s equity consists of a total of 831,000,000 authorized shares across all classes of capital stock, which the Company has the authority to issue. The 831,000,000 authorized shares consist of 1,000,000 authorized shares of Preferred Stock with a par value of $0.0001 per share, 520,000,000 authorized shares of Class A Common Stock with a par value of $0.0001 per share, and 310,000,000 As of March 31, 2024 (Successor), the Company had no As of March 31, 2024 (Successor), redeemable non -controlling After considering the effects of consolidation, the Company owns 33.8% of OpCo and non -controlling -controlling March 31, Net Loss before income tax $ (45,670 ) Redeemable non-controlling interest percentage – Class A OpCo Units 66.2 % Net Loss before income tax attributable to Class A OpCo Units $ (29,773 ) Predecessor Period The Company’s equity in the Predecessor Period comprised a single class of membership interests. The Company’s members’ equity as of March 31, 2023 (Predecessor) included 4,987,845 authorized membership interests, of which 3,763,224 were issued and outstanding.	NOTE 11 — Shareholders’ Equity and Non-Controlling Interest Successor Period The Company’s equity consists of a total of 831,000,000 authorized shares across all classes of capital stock, which the Company has the authority to issue. The 831,000,000 authorized shares consist of 1,000,000 authorized shares of Preferred Stock with a par value of $0.0001 per share, 520,000,000 authorized shares of Class A Common Stock with a par value of $0.0001 per share, and 310,000,000 As of December 31, 2023 (Successor), the Company had no Class A Common Stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders and do not have cumulative voting rights. Class A Common Stock is entitled to receive dividends (payable in cash, stock or otherwise), if any, as may be declared from time to time by the Company’s Board of Directors (the “Board”). In the event of liquidation, dissolution, distribution of assets or other winding up, Class A Common Stock is entitled to receive ratably the assets available for distribution to the stockholders after payment of liabilities and the liquidation preference of any outstanding shares of Preferred Stock. Class B Common Stock is not transferable except in connection with a permitted transfer of a corresponding number of OpCo Units. Class B Common Stock is entitled to one vote per share on all matters to be voted upon by the holders of Common Stock. Holders of shares of Class A Common Stock and Class B Common Stock vote together as a single class on all matters presented to stockholders subject to certain exceptions. Class B Common Stock does not have the right to receive dividends, unless the dividend consists of shares of Class B Common Stock or of rights, options, warrants or other securities convertible or exercisable into or redeemable for shares of Class B Common Stock paid proportionally with respect to each outstanding share of Class B Common Stock and a dividend consisting of shares of Class A Common Stock or of rights, options, warrants or other securities convertible or exercisable into or redeemable for shares of Class A Common Stock on the same terms is simultaneously paid to the holders of Class A Common Stock. Class B Common Stock does not have any right to receive a distribution upon a liquidation or winding up of the Company. As of December 31, 2023 (Successor), redeemable non -controlling After considering the effects of consolidation, the Company owns 33.0% of OpCo and NCI holders own the residual 67.0%. The table below demonstrates the calculation of net loss before income tax attributable to redeemable non -controlling Period from Net Loss before income tax $ (147,523 ) Redeemable non-controlling interest percentage – Class A OpCo Units 67.0 % Net Loss before income tax attributable to Class A OpCo Units $ (98,760 ) Earnout Shares and Restricted Shares As part of the Business Combination (Note 3), 128,908,518 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, 7,624,999 Class B OpCo Units and a corresponding number of shares of Class B Common Stock and 54,047,495 Of the total shares subject to vesting and transfer restrictions, 986,775 Class A OpCo Units, all of which were formerly Class B OpCo Units, and a corresponding number of shares of Class B Common Stock vest in three equal tranches contingent upon the share price of the Class A Common Stock or the occurrence of a change in control event (the “Earnout Shares”). The first tranche vests if the closing price of the Class A Common Stock on the NYSE is greater than or equal to $12.00 for any 20 trading days within a consecutive 30 -trading-day -trading-day -trading-day three -year Of the OpCo Units subject to transfer restrictions, 44,544,551 Class A OpCo Units, of which 1,575,045 were formerly Class B OpCo Units, (the “Price -Based -up three -year -day -third -Based -up -up -third -Based -up -up -Based -up -up The remaining 89,449,655 Class A OpCo Units, of which 3,510,643 were formerly Class B OpCo Units (the “Time -Based -up one -year NYSE, for any 20 trading days within any 30 consecutive trading -day -Based -up -up On August 16, 2023, pursuant to the OpCo limited liability company agreement, all Class B OpCo Units converted into Class A OpCo Units on a one -for-one -for-one During the period from June 8, 2023 through December 31, 2023 (Successor), the Company’s Class A Common Stock achieved the $12.00 per share and $14.00 per share prices necessary to cause two -thirds -up -thirds -Based -Up -Based Predecessor Period The Company’s equity in the Predecessor Period comprised a single class of membership interests. The Company’s members’ equity as of December 31, 2022 (Predecessor) included 4,987,845 authorized membership interests, of which 3,722,355 were issued and outstanding. Due to the absence of an active market for the Company’s membership interests, the Company utilized methodologies in accordance with the framework of the American Institute of Certified Public Accountants Technical Practice Aid — V aluation of Privately -Held Company Equity Securities Issued as Compensation

Share-Based Payments

Share-Based Payments	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Share-Based Payments [Abstarct]
Share-Based Payments	NOTE 12 — Share-Based Payments OpCo Unit Awards (Predecessor and Successor) As of March 31, 2024 (Successor), there was $1,639 of unrecognized share -based three The following table presents a summary of employee equity awards comprised of Class A OpCo Units and the corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed included in the condensed consolidated statements of operations and comprehensive loss: Quantity Calculated Value March 31, March 31, March 31, March 31, Unvested, beginning of period 848,415 226,494 $ 5.21 $ 63.25 Granted — — $ — $ — Forfeited — — $ — $ — Vested — — $ — $ — Accelerated — — $ — $ — Unvested, end of period 848,415 226,494 $ 5.21 $ 63.25 Restricted Stock Units (Successor) During the three months ended March 31, 2024 (Successor), the Company authorized the issuance of 504,421 restricted share units (“RSU”) under the terms of the 2023 Omnibus Incentive Plan. As of March 31, 2024 (Successor), there was $5,201 of unrecognized share -based three The following table presents a summary of RSU’s outstanding, granted, forfeited, vested and accelerated during the three months ended March 31, 2024 (Successor): Quantity Fair Value Unvested, beginning of period 443,221 $ 13.13 Granted 71,200 $ 9.26 Forfeited — $ — Vested — $ — Accelerated (10,000 ) $ 13.23 Unvested, end of period 504,421 $ 12.85 Awards granted to employees and the majority of executives cliff -vest -year three -year BHES JDA (Predecessor and Successor) The following table presents the quantity and value of equity issued to Baker Hughes Energy Services LLC (“BHES”) as payment for costs incurred pursuant to the Original JDA and the Amended and Restated BHES JDA (Note 14). -controlling -month Quantity Total Fair Value March 31, March 31, March 31, March 31, Equivalent (1) Membership Interests — 9,210 $ — $ 1,943 $ 168.75 Class A OpCo Units 650,248 — 4,298 — $ 5.29 Class B Common Stock 650,248 — — — $ — Total $ 4,298 $ 1,943 ____________ (1) Shares used as payment under the terms of the Amended and Restated JDA are issued at a discount expected to cause a total loss of approximately $17,500 to the Company over the term of the agreement. The Company has incurred inception -to-date BHES may earn additional shares under the terms of the Amended and Restated JDA (“BHES Bonus Shares”) if it meets certain contractually stipulated project milestones related to the development of our technology. The Company determined that BHES’s achievement of each of these milestones is probable in accordance with the guidance in ASC Topic 718; therefore, the Company recognizes the compensation cost associated with milestone share -based Performance Compensation Remaining Total BHES JDA – variable share-based payments January 2027 $ 21,777 $ 5,568 $ 27,345 Additionally, BHES received 47,000 membership interests that converted into 1,500,265 Class A OpCo Units and a corresponding number of shares of Class B Common Stock in conjunction with the consummation of the Business Combination. Reference Note 14 for additional quantitative disclosures related to the BHES JDA.	NOTE 12 — Share-Based Payments OpCo Unit Awards (Predecessor and Successor) As of December 31, 2023 (Successor), there was $2,352 of unrecognized share -based three As of December 31, 2022 (Predecessor), there was $9,312 of unrecognized share -based Pursuant to the Business Combination Agreement (Note 3), the Company agreed to amend the settlement provisions of certain unvested, outstanding profits interests previously issued by NET Power, LLC (the “Replacement Awards”). Unvested Replacement Awards that would have originally settled into NET Power, LLC membership interests will now settle into Class A OpCo Units and a corresponding number of shares of Class B Common Stock. The number of Class A OpCo Units and shares of Class B Common Stock into which the Replacement Awards will settle is calculated so that the settlement value approximates the value of NET Power, LLC membership interests into which the profits interests would have settled. The Replacement Awards will continue to vest over the original applicable service periods and are subject to the same performance conditions as the profits interests. Compensation cost associated with the Replacement Awards is recognized over the requisite service period as the Company evaluates the probability of performance conditions’ achievement. The following table presents a summary of employee equity awards comprised of Class A OpCo Units and the corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year -to-date Quantity Calculated Value Period from Period from Period from Period from Unvested, beginning of period 1,895,122 226,494 $ 4.95 $ 63.25 Granted — — $ — $ — Forfeited (324,568 ) — $ 5.66 $ — Vested (30,069 ) (107,418 ) $ 4.32 $ 63.18 Accelerated (692,070 ) — $ 4.32 $ — Unvested, end of period 848,415 119,076 $ 4.62 $ 63.32 Accelerated Vesting and Forfeiture of Certain Profits Interests Also pursuant to the Business Combination Agreement, the Company agreed to accelerate the vesting of certain unvested profits interests upon completion of the Business Combination. The Business Combination resulted in the immediate vesting of 30,000 profits interests, which equated to 451,356 Class A OpCo Units and a corresponding number of shares of Class B Common Stock, that generated $1,624 in compensation cost, which was directly attributed to the transaction on June 8, 2023. The expense generated by the accelerated vesting of certain profits interests is recorded in General and administrative within the June 8 through December 31, 2023 (Successor) period on the consolidated statement of operations and comprehensive loss. Additionally, the Business Combination resulted in the forfeiture of 30,000 unvested profits interests, which equated to 324,568 Class A OpCo Units and a corresponding number of shares of Class B Common Stock. This forfeiture did not affect the compensation expense recorded on the consolidated statement of operations and comprehensive loss because the awards were unvested at the time of forfeiture. Restricted Stock Units (Successor) In conjunction with the Business Combination, the Board and RONI’s shareholders approved the 2023 Omnibus Incentive Plan. The 2023 Omnibus Incentive Plan initially reserves 20,468,545 During the period from June 8, 2023 through December 31, 2023 (Successor), the Company authorized the issuance of 443,221 RSU’s under the terms of the Omnibus Incentive Plan. As of December 31, 2023 (Successor), there was $5,188 of unrecognized share -based three The following table presents a summary of RSU’s outstanding, granted, forfeited, vested and accelerated during the period from; June 8, 2023 through December 31, 2023 (Successor): Quantity Fair Value Unvested, beginning of period — $ — Granted 443,221 $ 13.43 Forfeited — $ — Vested — $ — Accelerated — $ — Unvested, end of period 443,221 $ 13.43 Awards granted to employees and the majority of executives cliff -vest -year -year BHES JDA (Predecessor and Successor) The following table presents the quantity and value of equity issued to Baker Hughes Energy Services LLC (“BHES”) as payment for costs incurred pursuant to the Original JDA and the Amended and Restated JDA (Note 14). -controlling Quantity Total Fair Value Period from Period from Period from Period from Equivalent (1) Membership Interests — 9,210 $ — $ 1,943 $ 168.75 Class A OpCo Units 1,236,265 296,160 8,172 1,958 $ 5.29 Class B Common Stock 1,236,265 296,160 — — $ — Total $ 8,172 $ 3,901 ____________ (1) Shares used as payment under the terms of the Amended and Restated JDA are issued at a discount expected to cause a total loss of approximately $17,500 to the Company. The Company has incurred inception -to-date BHES may earn additional shares under the terms of the Amended and Restated JDA (“BHES Bonus Shares”) if it meets certain contractually stipulated project milestones related to the development of the Demonstration Plant. The Company determined that BHES’s achievement of each of these milestones is probable in accordance with the guidance in ASC 718; therefore, the Company recognizes the compensation cost associated with milestone share -based Performance Compensation Remaining Total BHES JDA – variable share-based payments January, 2027 $ 21,167 $ 6,178 $ 27,345 Additionally, BHES received 47,000 membership interests that converted into 1,500,265 Class A OpCo Units and a corresponding number of shares of Class B Common Stock in conjunction with the consummation of the Business Combination (Note 3). Reference Note 14 for additional quantitative disclosures related to the BHES JDA.

Leases

Leases	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Leases	NOTE 13 — Leases The following table presents the future minimum lease payments that the Company expects to make under its operating leases as of March 31, 2024 (Successor): Year Future 2024 $ 379 2025 517 2026 531 2027 544 2028 511 2029 and thereafter — Total $ 2,482 Lease cost for the three months ended March 31, 2024 (Successor) and March 31, 2023 (Predecessor) was $128 and $49, respectively. Lease costs are recorded as General and administrative expense on the condensed consolidated statements of operations and comprehensive loss. Office Leases On June 6, 2022, the Company entered into an office space lease agreement for commercial office space in Durham, North Carolina (the “Measurement Building Lease”), which became effective on November 1, 2022 and had an original lease term of 60 62 -of-use As of March 31, 2024 (Successor), the Company had $2,092 in lease liabilities and $1,974 in right -of-use On February 28, 2024, the Company entered into an office space lease agreement for commercial office space in Houston, Texas (the “Atlas Tower Lease”), which becomes effective no earlier than June 1, 2024 and has an original lease term of 68 -of-use -2024 On March 8, 2024, the Company entered into a land lease with a subsidiary of OXY, a related party, which becomes effective no later than December 31, 2024. The lease has an initial term of 60 ten -of-use The Roney St. Lease includes an early termination option that enables the Company to end the lease on or after its 50 th th -of-use	NOTE 13 — Leases As of December 31, 2023 (Successor), the Company had two leases, both of which are classified as operating leases. The following table presents the future minimum lease payments that the Company expects to make under its operating leases: Year Future 2024 $ 504 2025 517 2026 531 2027 545 2028 512 2029 and thereafter — Total $ 2,608 Lease cost for the period from January 1, 2023 through June 7, 2023 (Predecessor) and the period from June 8, 2023 through December 31, 2023 (Successor) was $260 and $85, respectively. Lease cost for the year ended December 31, 2022 (Predecessor) was $95. Lease costs are recorded as General and administrative expense on the consolidated statement of operations and comprehensive loss. Office Lease On June 6, 2022, the Company entered into an office space lease agreement (the “Measurement Building Lease”), which became effective on November 1, 2022 and had an original lease term of 60 62 -of-use As of December 31, 2023 (Successor), the Company had $2,155 in lease liabilities and $2,059 in right -of-use The Roney St. Lease includes an early termination option that enables the Company to end the lease on or after its 50 th -of-use Land Lease The Company leases the land under the Demonstration Plant. The lease expires on the earlier of (i) July 1, 2025 or (ii) the termination of the Company’s oxygen supply agreement with the lessor. Lease payments for the land equal one dollar per year. In conjunction with the Business Combination (Note 3), the Company revalued its land lease at its fair value, which involved a comparison of the land lease’s terms against comparable market lease terms. As of December 31, 2023 (Successor), the value of the right -of-use

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Commitments and Contingencies [Abstract]
Commitments and Contingencies	NOTE 14 — Commitments and Contingencies Asset Retirement Obligation The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms. The following table reconciles the beginning and ending balances of the asset retirement obligation as of the dates presented: March 31, March 31, Asset retirement obligation, beginning of period $ 2,060 $ 2,416 Obligation incurred — — Accretion expense 43 59 Asset retirement obligation, end of period $ 2,103 $ 2,475 Unconditional Purchase Obligations The Company has committed to purchase industrial components for installation at its Demonstration Plant and its first commercial power plant. The Company pays for these components in installments aligned to contractual milestones specified by each commitment’s counterparty. In accordance with ASC Topic 440, Commitments The following table presents the Company’s material, unrecognized purchase obligations as of the periods described: Commitment Consideration Type Gross Commitment March 31, 2024 (Successor) Prior Predecessor/ Remaining Commitment Asset purchase commitments Cash $ 26,009 $ 1,372 $ 5,191 $ 19,446 BHES JDA Cash 70,000 3,438 11,868 54,694 BHES JDA Share-Based 70,000 3,438 11,868 54,694 Total $ 166,009 $ 8,248 $ 28,927 $ 128,834 BHES JDA On February 3, 2022, the Company entered into a Joint Development Agreement with affiliates of BHES, which is a shareholder (the “Original JDA”). The Original JDA’s counterparties subsequently amended the agreement’s terms on June 30, 2022 and December 13, 2022 (the “Amended and Restated JDA”, and collectively with the Original JDA, the “BHES JDA”). The Amended and Restated JDA represents a contract that engages BHES to invest in, develop and deploy the NET Power Cycle in collaboration with the Company. The Amended and Restated JDA entitles BHES to payments of cash and equity in exchange for services related to the development and commercialization of the technology. Subsequent to the Business Combination, the Company records the measurement of services provided by BHES within Research and development on the condensed consolidated statements of operations and comprehensive loss. Prior to June 8, 2023 (Successor), the Company recorded costs incurred under the BHES within Research and development — related party on the condensed consolidated statements of operations and comprehensive loss due to the size of their ownership of the Company and because an employee of BHES served on the Company’s Board of Directors. Subsequent to the Business Combination, neither BHES nor its affiliates occupy seats on the Company’s Board of Directors and its percentage of ownership fell below 5%; therefore, BHES no longer qualifies as a related party after June 7, 2023 (Predecessor). Prior to the Business Combination, the Company used membership interests to compensate BHES for its services under the BHES JDA (Note 12). After the Business Combination, the Company uses Class A OpCo Units and corresponding quantities of Class B Common Stock to compensate BHES for its services under the BHES JDA (Note 12). The following table presents the costs associated with the BHES JDA included in the condensed consolidated statements of operations and comprehensive loss: March 31, March 31, Cash expense $ 3,438 $ 1,554 Membership interests issued — 1,943 Class A OpCo Units issued 4,298 — BHES JDA Bonus Share expense 610 2,688 Total research and development attributable to BHES JDA $ 8,346 $ 6,185	NOTE 14 — Commitments and Contingencies Litigation In conjunction with the Business Combination (Note 3), the Company entered into a settlement agreement with a RONI shareholder related to certain disclosures made in the registration statement filed by RONI for the Business Combination. The settlement amount did not have a material effect on the consolidated financial statements of the Company. Asset Retirement Obligation The Company’s valuation of the asset retirement obligation related to the Demonstration Plant encompasses an estimate for the cost to restore the site as required by lease terms. The following table reconciles the beginning and ending balances of the asset retirement obligation for each period presented: Period from Period from Year Ended Asset retirement obligation, beginning of period $ 1,967 $ 2,416 $ — Obligation incurred — — 2,201 Periodic accretion expense 93 102 215 Asset retirement obligation, end of period $ 2,060 $ 2,518 $ 2,416 Unconditional Purchase Obligations The Company has committed to purchase industrial components for installation at its Demonstration Plant and its first commercial power plant. The Company pays for these components in installments aligned to contractual milestones specified by each commitment’s counterparty. In accordance with ASC Topic 440, Commitments The following table presents the Company’s material, unrecognized purchase obligations: Commitment Consideration Gross Commitment Period from Period from Prior Remaining Asset purchase commitments Cash $ 26,009 $ 4,023 $ 1,168 $ — $ 20,818 BHES JDA Cash 70,000 6,536 3,121 2,211 58,132 BHES JDA Share-Based 70,000 6,536 3,121 2,211 58,132 Total $ 166,009 $ 17,095 $ 7,410 $ 4,422 $ 137,082 BHES JDA On February 3, 2022, the Company entered into a Joint Development Agreement with affiliates of BHES, which is a shareholder (the “Original JDA”). The Original JDA’s counterparties subsequently amended the agreement’s terms on June 30, 2022 and December 13, 2022 (the “Amended and Restated JDA”, and collectively with the Original JDA, the “BHES JDA”). The Amended and Restated JDA represents a contract that engages BHES to invest in, develop and deploy the NET Power Cycle in collaboration with the Company. The Amended and Restated JDA entitles BHES to payments of cash and equity in exchange for services related to the development and commercialization of the technology. The Company records the measurement of services provided by BHES within Research and development on the consolidated statement of operations and comprehensive loss. Prior to the Business Combination, the Company used membership interests to compensate BHES for its services under the BHES JDA (Note 12). After the Business Combination, the Company uses Class A OpCo Units and corresponding quantities of Class B Common Stock to compensate BHES for its services under the BHES JDA (Note 12). The following table presents the costs associated with the BHES JDA during the periods presented: Period from June 8 – January 1 – January 1 – Cash expense $ 6,536 $ 3,121 $ 2,211 Membership interests issued — 3,902 2,765 Class A OpCo Units issued 8,172 — — BHES Bonus Share expense 6,620 4,690 9,857 Total research and development attributable to BHES JDA $ 21,328 $ 11,713 $ 14,833 Prior to June 8, 2023 (Successor), the Company recorded costs incurred under the BHES within Research and development — related party on the consolidated statement of operations and comprehensive loss due to the size of their ownership of the Company and because an employee of BHES served on the Company’s Board of Directors. Subsequent to the Business Combination, neither BHES nor its affiliates occupy seats on the Company’s Board of Directors and its percentage of ownership fell below 5%; therefore, BHES no longer qualifies as a related party after June 7, 2023.

Income Taxes

Income Taxes	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Income Taxes [Abstract]
Income Taxes	NOTE 15 — Income Taxes As of March 31, 2024 (Successor), the Company estimated its annual effective tax rate to be 8.11%, and recorded a deferred income tax benefit of $4,038 for the quarter. The annual effective tax rate varies from the statutory federal income tax rate due to amounts allocated to non -controlling Tax Receivable Agreement —	NOTE 15 — Income Taxes Prior to the Closing Date, NET Power, LLC was considered a pass -through The following table presents the components of the Company’s current and deferred income taxes: June 8 – Federal Current tax expense (benefit) $ — Deferred tax expense (benefit) (5,542 ) Total federal (5,542 ) State and local Current tax expense (benefit) — Deferred tax expense (benefit) (165 ) Total state and local (165 ) Total $ (5,707 ) The following table presents the Company’s effective income tax rate during the period from June 8, 2023 through December 31, 2023 (Successor): June 8 – U.S. federal statutory rate 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit 0.1 % Non-controlling interests (14.1 )% Equity transactions (3.8 )% Other permanent adjustments (0.5 )% Change in investment in OpCo (2.5 )% Valuation allowance 3.7 % Effective tax rate 3.9 % The following table presents the effects of temporary differences arising from deferred income taxes as of December 31, 2023 (Successor): December 31, Deferred tax assets Federal net operating losses $ 1,976 State net operating losses 186 Investment in OpCo 62,972 Deferred tax assets, gross 65,134 Valuation allowance (62,972 ) Deferred tax assets, net 2,162 Deferred tax liabilities Property, plant and equipment and developed technology (59,881 ) Deferred tax liabilities, gross (59,881 ) Deferred tax liabilities, net $ (57,719 ) As of June 8, 2023 (Successor), the Company recorded a deferred tax asset of $77,700, which was fully reserved. The change in the valuation allowance of $14,728 from June 8, 2023 to December 31, 2023 corresponds to the change in the balance of the deferred tax asset attributable to NET Power Inc.’s investment in OpCo. The Company does not believe that this deferred tax asset is more -likely-than-not As of December 31, 2023 (Successor), the Company recorded no unrecognized tax benefits that, if recognized, would decrease the Company’s effective tax rate. The measurement of unrecognized tax benefits is not expected to significantly change during the twelve months following the date of the consolidated balance sheets. Management evaluated the Company’s tax positions and concluded that the Company had taken no uncertain tax positions that require adjustment to comply with applicable accounting guidance. The Company and its subsidiaries file U.S. federal income tax returns as well as tax returns in various state jurisdictions. OpCo files U.S. federal and state tax returns. Generally, tax years between 2020 and 2023 remain open to examination by the tax authorities in these jurisdictions. Although the outcomes of tax examination are uncertain, management believes that adequate provisions for income taxes have been made. If outcomes differ materially from management’s estimates, those outcomes could have a material impact on the Company’s financial condition and results of operations. Differences between actual results and assumptions or changes in assumptions in future periods are recorded in the period they become known. To the extent additional information becomes available prior to resolution, such accruals are adjusted to reflect probable outcomes. Tax Receivable Agreement As of December 31, 2023 (Successor), the Company recorded a liability of $8,937 related to its projected obligations under the TRA, which is recorded as Tax Receivable Agreement liability on the Company’s consolidated balance sheets. This obligation arose because of qualifying exchanges of Class A OpCo Units that occurred during the period from June 8, 2023 through December 31, 2023 (Successor).

Investments

Investments	3 Months Ended
	Mar. 31, 2024
Investments [Abstract]
Investments	NOTE 8 — Investments The Company has two types of investments, a certificate of deposit, which is classified as short -term -for-sale The entire balance of $100,000 of the certificate of deposit is shown within short -term The following table presents the Company’s available -for-sale March 31, 2024 Current assets Amortized Unrealized Gain Fair Corporate bonds $ 9,900 $ 78 $ 9,978 Commercial paper 23,641 199 23,840 U.S. treasuries 35,214 158 35,372 Total $ 68,755 $ 435 $ 69,190 Long-term assets Amortized Unrealized Gain Fair Corporate bonds $ 2,900 $ 30 $ 2,930 U.S. treasuries 24,666 197 24,863 Total $ 27,566 $ 227 $ 27,793 The cost of securities sold is based on the specific -identification -for-sale

Accounting Policies, by Policy

Accounting Policies, by Policy (Policies)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements included in this Quarterly Report on Form 10 -Q In management’s opinion, these unaudited condensed consolidated financial statements have been prepared on the same basis as the annual financial statements for the year ended December 31, 2023 and include all adjustments, which consist of only normal and recurring adjustments, necessary for fair statement. The results reported in these unaudited condensed consolidated financial statements are not necessarily indicative of the results to be expected for the entire year. These unaudited condensed consolidated financial statements should be read in conjunction with the annual financial statements and notes thereto included in our Annual Report on Form 10 -K	Basis of Presentation The accompanying consolidated financial statements are prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”). Certain prior period amounts have been reclassified to conform to current period presentation. The consolidated financial statements include the accounts of subsidiaries that NET Power Inc. consolidated according to the rules set forth in ASC 810. The Company consolidates all wholly -owned -owned
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with US GAAP requires management to make certain estimates, judgments and assumptions. The estimates, judgments and assumptions made by the Company when accounting for items and matters such as, but not limited to, depreciation, amortization, asset valuations and share -based	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions. The Company believes that the estimates, judgments and assumptions made when accounting for items and matters such as, but not limited to, depreciation, amortization, asset valuations and share -based
Business Combinations		Business Combinations The Company applies the guidance within ASC Topic 805, Business Combinations The Company applies the acquisition method for all transactions and other events through which the Company obtains control over one or more other businesses, including the Business Combination (Note 3). Under the acquisition method, assets acquired and liabilities assumed are measured at fair value as of the acquisition date. Liabilities related to contingent consideration are recognized on the acquisition date and remeasured at fair value in each subsequent reporting period, if the contingent consideration is liability classified. Goodwill is recognized as the excess of the consideration transferred over the fair value of the net identifiable assets acquired.
Segment Reporting		Segment Reporting In accordance with ASC Topic 280 — Segment Reporting
Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts		Revenue Recognition, Trade Receivables and Allowance for Doubtful Accounts The Company follows the guidance within ASC Topic 606, Revenue from Contracts with Customers The Company accounts for a customer contract when both parties have approved the contract and are committed to perform their respective contractual obligations, each party’s rights can be identified, payment terms can be identified, the contract has commercial substance and it is probable that the Company will collect the consideration to which it is entitled. When billed in advance, the payment is deferred and recognized upon delivery of the service. Collectability is assessed based on a number of factors including collection history and customer creditworthiness. If collectability of substantially all consideration to which the Company is entitled under the contract is determined to be not probable, revenue is not recorded until collectability becomes probable. Revenue is recorded based on the transaction price excluding amounts collected on behalf of third parties, such as sales taxes collected and remitted to governmental authorities. Trade receivables are recorded at the invoiced amount and do not bear interest. The Company calculates an allowance for doubtful accounts based on a risk assessment performed when trade receivables are recognized. The allowance is calculated in accordance with ASC Topic 326, Current Expected Credit Losses -offs
Fair Value		Fair Value Certain assets and liabilities are carried at fair value in accordance with ASC Topic 820, Fair Value Measurement • • • Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of any input that is significant to the fair value measurement. The Company’s estimates of fair values are based upon assumptions believed to be reasonable, but which are uncertain and involve significant managerial judgments made by considering factors specific to the asset or liability. The determination of fair value requires more judgment to the extent the valuation is based on models or inputs that are less observable or unobservable in the market. Accordingly, the degree of judgment exercised by the Company in determining the fair value is greatest for instruments categorized as Level 3. The Company’s recurring fair value measurements comprise the Private Placement Warrants, the Public Warrants, the Earnout Shares (as defined in Note 11) and short -term
Cash and Cash Equivalents		Cash and Cash Equivalents Cash consists of liquid deposits at banking institutions that are members of the Federal Deposit Insurance Corporation (“FDIC”). FDIC guidelines guarantee $250 per depositor, per insured bank. As of December 31, 2023 (Successor) and December 31, 2022 (Predecessor), the Company held cash in excess of FDIC limits equal to $334,289 and $4,644 respectively. As defined within ASC Topic 230, Statement of Cash Flows -term The carrying value of cash and cash equivalents equals its fair value.
Short-Term Investments		Short-Term Investments The Company classifies investments with maturities greater than three months but less than one year as short -term -term -month Short -term -to-maturity Investments — Debt Securities -term -term
Investments in Securities		Investments in Securities In accordance with ASC 320, the Company classifies investments in fixed maturity securities at the acquisition date and reevaluates the classification at each balance sheet date. Held -to-maturity -for-sale -credit The primary objectives of the Company’s investment portfolio are to maintain the safety of invested capital, provide prudent levels of liquidity to accommodate operational and capital needs and maintain an acceptable level of risk. These risks include credit risk, interest rate risk and concentration risk, which are mitigated through the creation of a diversified investment portfolio consisting of liquid and high credit quality financial instruments. As required by ASC Topic 326, Financial Instruments — Credit Losses -for-sale -offs -for-sale The Company did not hold any investments in securities as of either December 31, 2023 (Successor) or December 31, 2022 (Predecessor), respectively.
Warrants		Warrants The Company issued Public Warrants and Private Placement Warrants (as defined in Note 3) prior to the consummation of the Business Combination. The Company accounts for both the Public Warrants and Private Placement Warrants as liability -classified Distinguishing Liabilities from Equity Derivatives and Hedging classification under ASC 815 and whether class of equity into which the Warrants settle possess substantive voting rights. This assessment is conducted at the time of the instruments’ issuance and at each subsequent quarterly period end date while the Warrants remain outstanding. In compliance with ASC 815, the Company accounts for the outstanding Warrants as a liability at fair value on the consolidated balance sheets. The Warrants are subject to remeasurement at each reporting date with any change in the fair value recognized in Change in Earnout Shares liability and Warrant liability on the Company’s consolidated statement of operations and comprehensive loss.
Tax Receivable Agreement Liability		Tax Receivable Agreement Liability As part of the Business Combinations, the Company entered into the Tax Receivable Agreement (“TRA”) with certain OpCo unitholders that will represent approximately 75% of the calculated tax savings based on the portion of basis adjustments on exchanges of OpCo units and other carryforward attributes that are anticipated to be able to be utilized in future years. Such tax attributes include the existing tax basis of certain assets of OpCo and its consolidated subsidiaries; tax basis adjustments resulting from taxable exchanges of Class A OpCo Units; certain tax benefits realized by NET Power Inc. as a result of the Business Combination and tax deduction in respect of portions of certain TRA payments. All such payments made under the terms of the TRA are the obligations of NET Power Inc. and not of OpCo. Reference Note 15 for additional information about the TRA Liability.
Intangible Assets		Intangible Assets The Company accounts for definite -lived Goodwill and Other Intangible Assets -year
Goodwill		Goodwill The Company recognizes goodwill in accordance with ASC 350. Goodwill represents the excess costs of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. The Company’s goodwill is not tax deductible. Goodwill is not amortized but is tested annually for impairment. The Company assesses its goodwill value for impairment annually as of October 1. Impairment exists when the carrying amount of the reporting unit exceeds its fair value and an impairment loss is recognized. The Company determined that no impairment charges for goodwill were required to be recognized during the period ended December 31, 2023.
Prepaid Expenses		Prepaid Expenses Prepaid expenses consist of costs paid in advance for software and other subscriptions, patent renewal fees, general liability insurance and employee health insurance.
Property, Plant and Equipment		Property, Plant and Equipment Property, plant and equipment is generally recorded at the historical cost to acquire the assets. The costs bases of property, plant and equipment to which the Company held title prior to the Business Combination (Note 3) were stepped -up Depreciation is calculated on the straight -line Asset Classification Useful Life Furniture and Equipment 4 – 7 Demonstration Plant 7 Property, plant and equipment is presented at cost less accumulated depreciation on the consolidated balance sheets.
Impairment of Long-Lived Assets		Impairment of Long-Lived Assets In accordance with ASC Topic 360, Property, Plant and Equipment
Leases		Leases Lease agreements may fall within two categories according to ASC Topic 842, Leases -of-use -term -of-use -lease -of-use
Asset Retirement Obligation		Asset Retirement Obligation The Company recognizes liabilities for future obligations associated with the retirement of assets. The fair values of legal obligations to retire and remove long -lived -date seven -year
Net Loss per Unit		Net Loss per Unit During the Predecessor Period, the Company computed basic net loss per unit by dividing the total net loss applicable to membership interest holders by the weighted average number of membership interests outstanding during the period. The Company computed diluted net loss per unit by dividing the net loss applicable to membership interest holders by the sum of the weighted -average -dilutive -dilutive
Net Loss per Share		Net Loss per Share During the Successor Period, basic net loss per share is computed based on the weighted average number of shares of Class A Common Stock outstanding. Diluted net loss 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. For the purposes of the diluted earnings per share calculation, Warrants, Earnout Shares (as defined in Note 11), restricted stock units and conversion of OpCo Units are excluded from the calculation for the period from June 8, 2023 through December 31, 2023 (Successor), as the inclusion would be anti -dilutive
Share Based Compensation		Share Based Compensation The Company applies ASC Topic 718, Share -Based Payments -based -based -cash -based -line -based Prior to the Business Combination, equity awards granted to employees included unvested membership units in NET Power, LLC. The estimated fair value of NET Power, LLC membership units was determined by an independent, external valuation service provider at each equity grant date until the Closing Date, upon which the Company became publicly traded. On the Closing Date, the Company fair valued the OpCo Units used to satisfy outstanding share -based
Earnout Shares and Restricted Shares		Earnout Shares and Restricted Shares Unvested Earnout Shares (as defined in Note 11) are reported as liabilities on the Company’s consolidated balance sheets. The liability classification reflects the interpretation that the Earnout Share settlement provision contingent on a change in control event does not represent an input into a fixed -for-fixed -for-fixed The Price Based Lockup Shares and the Time -Based
Non-Controlling Interest		Non-Controlling Interest Non -controlling Units (Note 11). After evaluating Class A OpCo Unit redemption rights under ASC 480, the Company determined that Class A OpCo Units are subject to potential cash redemption that rests outside the Company’s control. The Company has classified NCI as a component of mezzanine equity in consideration of this cash redemption feature and in accordance with the guidance in ASC 810. The Company measures redeemable NCI each quarter at the higher of its book value or its redemption value, which equals the closing price of the Company’s Class A Common Stock on the measurement date. As of December 31, 2023 (Successor), the book value was higher than the redemption value of non -controlling -Controlling -controlling The Company’s net loss before income tax and the non -tax -tax -controlling
Research and Development Costs		Research and Development Costs The Company expenses costs related to operations and testing at the Demonstration Plant, as well as engineering and design costs related to development of the NET Power Cycle as incurred. These costs are included in Research and development expense on the consolidated statement of operations and comprehensive loss.
Related Parties		Related Parties The Company applies ASC Topic 850, Related Parties The Company has entered into contractual relationships with several of its current shareholders and former members that qualify as related parties according to the aforementioned criteria. These relationships include loans from members and master service agreements (“MSA’s”). Reference Note 8 for additional information.
Income Taxes		Income Taxes The Company applies the guidance set forth in ASC Topic 740, Income Taxes -likely-than-not NET Power Inc. consolidates the financial results of OpCo in its consolidated financial statements. OpCo represents a pass -through -through -through
Accounting Standards Not Yet Adopted	Accounting Standards Not Yet Adopted During December 2023, the Financial Accounting Standards Board issued ASU 2023 -09 Income Taxes (Topic 740) Improvements to Income Tax Disclosures -09 -09 -09 -to-date -09 -09 -09 -09 -09	Recently Adopted Accounting Standards During November, 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023 -07 Segment Reporting (Topic 280) Improvements to Reportable Segment Disclosures -07 -07 and annual financial statements: significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss; an amount for other segment items, which comprise segment revenue less segment expenses and measures of segment profit or loss by reportable segment, and a description of their compositions; additional measures of segment profit, subject to qualifications, if the CODM uses more than one measure of a segment’s profit or loss in assessing segment performance and deciding how to allocate resources; and the title and position of the CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and deciding how to allocate resources. ASU 2023 -07 -07 The Company incorporated ASU 2023 -07 Accounting Standards Not Yet Adopted During October, 2023, the FASB issued ASU 2023 -06 Disclosure Improvements: Codification Amendments in Response to the SEC s Disclosure Update and Simplification Initiative -06 -06 -10532 Disclosure Update and Simplification into various topics within the Accounting Standards Codification -06 -06 During December, 2023, the FASB issued ASU 2023 -09 Income Taxes (Topic 740) Improvements to Income Tax Disclosures -09 -09 -09 -to-date -09 -09 -09 -09 -09
Reclassification	Reclassification Certain immaterial prior period amounts have been reclassified to conform to current period presentation.

Significant Accounting Polici_2

Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2023
Significant Accounting Policies [Abstract]
Schedule of Property, Plant, and Equipment Useful Life	The following table summarizes the estimated useful lives used to depreciate property, plant and equipment and assets: Asset Classification Useful Life Furniture and Equipment 4 – 7 Demonstration Plant 7

Business Combination (Tables)

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2023
Business Combination [Abstract]
Schedule of Consideration Transferred	The following table summarizes the total consideration transferred in the Business Combination: Consideration Transferred Total Pre-combination vesting of modified profits interests $ 325 Pre-combination vesting of unmodified profits interests 651 Consideration transferred to sellers 976 Class A OpCo Units – non-controlling interests 1,785,283 Fair value of total consideration transferred $ 1,786,259
Schedule of Assets and Liabilities Assumed	The following table sets forth the fair value of the assets and liabilities assumed in connection with the Business Combination: Total Assets acquired Current assets Cash $ 7,946 Prepaid expenses 637 Other current assets 30 Total current assets 8,613 Long-term assets Intangible assets, net 1,345,000 Property, plant and equipment 91,855 Right-of-use assets 940 Total long-term assets 1,437,795 Total assets acquired $ 1,446,408 Liabilities assumed Current liabilities Accounts payable $ 2,574 Accrued liabilities 7,370 Current lease liability 137 Other current liabilities 1 Total current liabilities 10,082 Long-term liabilities Deferred tax liability 71,426 Asset retirement obligation 1,967 Long-term lease liability 594 Total long-term liabilities 73,987 Total liabilities assumed 84,069 Total identifiable net assets 1,362,339 Goodwill 423,920 Net assets acquired $ 1,786,259
Schedule of Pro Forma Information	The following table presents unaudited pro forma information as if the Business Combination occurred as of January 1, 2022 (Predecessor). The unaudited pro forma information reflects adjustments for additional amortization resulting from the fair value re -measurement Year Ended December 31, 2023 2022 Pro forma revenue $ 175 $ 580 Pro forma net loss $ (205,387 ) $ (121,652 ) Pro forma net loss attributable to non-redeemable controlling interest $ (67,778 ) $ (40,145 ) Pro forma net loss attributable to non-redeemable non-controlling interests $ (137,609 ) $ (81,507 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets [Abstract]
Schedule of Goodwill	The following table presents the Company’s goodwill included in the condensed consolidated balance sheets: Goodwill at December 31, 2023 (Successor) $ 423,920 Measurement Adjustments — Goodwill at March 31, 2024 (Successor) $ 423,920	The following table presents the Company’s goodwill balance as of December 31, 2023 (Successor): Goodwill at June 8, 2023 (Successor) $ 433,736 Measurement Adjustments (9,816 ) Goodwill at December 31, 2023 (Successor) $ 423,920
Schedule of Definite lived intangible assets	The following tables summarize the Company’s definite lived intangible assets included in the condensed consolidated balance sheets: March 31, December 31, Developed technology, gross $ 1,345,000 $ 1,345,000 Accumulated amortization (54,547 ) (37,735 ) Developed technology, net $ 1,290,453 $ 1,307,265	The following tables present the Company’s definite lived intangible assets as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows: December 31, December 31, Developed technology, gross $ 1,345,000 $ 604 Accumulated amortization (37,735 ) (341 ) Developed technology, net $ 1,307,265 $ 263
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	The following table presents estimated amortization expense for the next five years and thereafter: Remainder of 2024 $ 50,438 2025 67,250 2026 67,250 2027 67,250 2028 67,250 2029 67,250 2030 and thereafter 903,765 Total $ 1,290,453	The following table presents estimated amortization expense for the next five years and thereafter: 2024 $ 67,250 2025 67,250 2026 67,250 2027 67,250 2028 67,250 2029 and thereafter 971,015 Total $ 1,307,265

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Member]
Schedule of Property, Plant and Equipment	The following table summarizes the key classifications of property, plant and equipment included in the condensed consolidated balance sheets: March 31, December 31, Furniture and equipment, gross $ 328 $ 320 Demonstration Plant, gross 89,239 89,239 Construction in progress 21,853 14,443 Total property, plant and equipment, gross 111,420 104,002 Accumulated depreciation (10,321 ) (7,146 ) Total property, plant and equipment, net $ 101,099 $ 96,856	The following table summarizes the key classifications of property, plant and equipment as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor): December 31, December 31, Furniture and equipment, gross $ 320 $ 368 Demonstration Plant, gross 89,241 128,013 Construction in progress 14,441 — Total property, plant and equipment, gross 104,002 128,381 Accumulated depreciation (7,146 ) (58,786 ) Total property, plant and equipment, net $ 96,856 $ 69,595

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Accrued Liabilities [Abstract]
Schedule of Accrued Liabilities	Accrued liabilities consist of the following components included in the condensed consolidated balance sheets: March 31, December 31, Accrued incentive compensation $ 819 $ 2,016 Accrued cash-based expense of BHES JDA 3,438 3,669 Accrued legal service provider fees 241 160 Accrued capital expenditures 1,721 3,605 Other accrued liabilities 992 1,465 Total accrued liabilities $ 7,211 $ 10,915	Accrued liabilities as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) are as follows: December 31, 2023 December 31, 2022 Accrued incentive compensation $ 2,016 $ 1,451 Accrued cash-based expense of BHES JDA 3,669 — Accrued legal service provider fees 160 713 Accrued capital expenditures 3,605 — Other accrued liabilities 1,465 228 Total accrued liabilities $ 10,915 $ 2,392

Revenue and Accounts Receivab_2

Revenue and Accounts Receivable (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Revenue and Accounts Receivable [Abstract]
Schedule of Revenue Streams	The following table disaggregates the revenue included in the condensed consolidated statements of operations and comprehensive loss into its major components: Three months ended March 31, March 31, Feasibility studies $ — $ 50 Test data sales — — Testing services — — Total revenue $ — $ 50	The following table disaggregates the Company’s revenue streams into its major sub -components June 8 – January 1 – January 1 – Feasibility studies $ — $ 175 $ 125 Test data sales — — 150 Testing services — — 305 Total revenue $ — $ 175 $ 580
Schedule of Accounts Receivable	Accounts receivable, net consist of the following balances included in the condensed consolidated balance sheets: March 31, December 31, Accounts receivable, gross $ — $ 58 Allowance for credit losses — — Accounts receivable, net $ — $ 58	Accounts receivable, net as of December 31, 2023 (Successor) and December 31, 2022 (Predecessor) includes the following balances: December 31, 2023 December 31, 2022 Accounts receivable, gross $ 58 352 Allowance for doubtful accounts — — Accounts receivable, net $ 58 $ 352

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Related Party Transactions [Abstract]
Schedule of Related Party Amounts on the Consolidated Statement of Operations and Comprehensive Loss		The following table summarizes the related party amounts on the consolidated balance sheets: December 31, 2023 December 31, 2022 Amounts due to related parties under MSA $ 142 $ 178 Due to related parties – current $ 142 $ 178 Amounts due to related parties under BHES JDA $ — $ 2,212 Due to related parties – long-term $ — $ 2,212
Schedule of Related Party Amounts on the Consolidated Statement of Operations and Comprehensive Loss	The following table summarizes the related party amounts included in the condensed consolidated balance sheets: March 31, December 31, Amounts due to related parties under master services agreements $ 302 $ 142 Three months ended March 31, March 31, Master services agreement administrative costs $ 26 $ 34 Engineering support provided by former board member — 76 General and administrative – related party $ 26 $ 110 Master services agreement costs for Demonstration Plant $ 267 $ 278 BHES JDA — 6,186 Research and development – related party $ 267 $ 6,464	The following table summarizes the related party amounts on the consolidated statement of operations and comprehensive loss for the periods presented: June 8 – January 1 – January 1 – MSA costs related to testing services $ — $ — $ 86 Cost of revenue – related party $ — $ — $ 86 MSA administrative costs $ 84 $ 79 $ 247 Engineering support provided by former board member — 97 230 Engineering services provided by former investor — — 27 General and administrative – related party $ 84 $ 177 $ 504 MSA costs for Demonstration Plant $ 643 $ 530 $ 984 BHES JDA — 11,713 14,833 Research and development – related party $ 643 $ 12,243 $ 15,817 Option settlement – related party $ 79,054 $ — $ —

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Fair Value Measurements [Abstarct]
Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis	The following table presents the assets and liabilities that the Company measures at fair value on a recurring basis included in the condensed consolidated balance sheets and indicates the level of the valuation inputs the Company utilized to determine each asset’s and each liability’s fair value: Level March 31, December 31, Assets Available-for-sale investments (1) 1 $ 96,983 $ — Short-term investments 2 100,000 100,000 Total assets $ 196,983 $ 100,000 Liabilities Public Warrants 1 $ 25,004 $ 18,969 Private Placement Warrants 3 45,017 36,951 Earnout Shares 3 2,147 1,671 Total liabilities $ 72,168 $ 57,591 (1) -term	The following table presents information about the Company’s liabilities that are measured at fair value on a recurring basis as of December 31, 2023 (Successor) and indicates the fair value hierarchy of the valuation inputs the Company utilized to determine each asset’s and each liability’s fair value: Assets Level 1 Level 2 Level 3 Total Short-term Investments $ — $ 100,000 $ — $ 100,000 Total $ — $ 100,000 $ — $ 100,000 Liabilities Level 1 Level 2 Level 3 Total Public Warrants $ 18,969 $ — $ — $ 18,969 Private Placement Warrants — — 36,951 36,951 Earnout Shares — — 1,671 1,671 Total $ 18,969 $ — $ 38,622 $ 57,591 Liabilities Level 1 Level 2 Level 3 Total Option Liability $ — $ — $ 5,174 $ 5,174 Total $ — $ — $ 5,174 $ 5,174
Schedule of Reconciliation of the beginning and Ending Balances of Recurring Level 3 Fair Value Measurements	The following table contains a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements included in the condensed consolidated statements of operations and comprehensive loss: March 31, March 31, Balance of recurring level 3 liabilities at beginning of period $ 38,622 $ 5,174 Change in Earnout Shares liability and Warrant liability 8,542 — Payments — (5,174 ) Balance of recurring level 3 liabilities at end of period $ 47,164 $ —	The following table presents a reconciliation of the beginning and ending balances of recurring level 3 fair value measurements: June 8 – January 1 – January 1 – Balance of recurring level 3 liabilities at beginning of $ 63,851 $ 5,174 $ 1,459 Change in Earnout Shares liability and Warrant liability (16,174 ) — — Change in Option liability — — 3,715 Issuances (9,055 ) — — Payments — (5,174 ) — Balance of recurring level 3 liabilities at end of period $ 38,622 $ — $ 5,174

Net Loss per Share_Unit (Tables

Net Loss per Share/Unit (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Net Loss per Share/Unit [Abstract]
Schedule of Diluted Net Loss Per Unit	Based on the amounts outstanding at March 31, 2024 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti -dilutive Anti-Dilutive Instrument March 31, Public Warrants 8,622,235 Private Placement Warrants 10,900,000 Earnout Shares 328,925 BHES Bonus Shares 2,068,416 Unvested Class A OpCo Units 848,415 Vested Class A OpCo Units 141,274,719 Unvested RSU’s 504,421 Total 164,547,131 Anti-Dilutive Instrument March 31, Unvested profits interests 226,494 Member loan share options — Occidental Petroleum share options — Total 226,494	on the amounts outstanding at December 31, 2023 (Successor), the Company excluded the following financial instruments from the computation of diluted net loss per unit because their inclusion would be anti -dilutive Anti-Dilutive Instrument December 31, Public Warrants 8,622,235 Private Placement Warrants 10,900,000 Earnout Shares 328,925 BHES Bonus Shares 2,068,416 Unvested Class A OpCo Units 848,415 Vested Class A OpCo Units 141,304,030 Unvested RSU’s 443,221 Total 164,515,242 -dilutive Anti-Dilutive Instrument December 31, June 7, Unvested profits interests 226,494 119,076 Member loan share options 34,588 — Occidental Petroleum share options 711,111 — Total 972,193 119,076
Schedule of Basic and Diluted Net Loss Per Share	The following table sets forth the computation of the Company’s basic and diluted net loss per share for the three months ended March 31, 2024 (Successor): Class A Numerator Net loss $ (41,632 ) Net loss attributable to shareholders $ (11,422 ) Denominator Weighted-average number shares outstanding, basic and diluted 71,895 Net loss per share attributable to shareholders, basic and diluted $ (0.16 ) March 31, Numerator Net loss $ (17,067 ) Net loss attributable to membership interest holders $ (17,067 ) Denominator Weighted-average number membership interests outstanding, basic and diluted 3,748 Net loss per unit attributable to membership interest holders, basic and diluted $ (4.55 )	The following table sets forth the computation of the Company’s basic and diluted net loss per share for the period from June 8, 2023 through December 31, 2023 (Successor): Class A Numerator Net loss $ (141,816 ) Net loss attributable to shareholders $ (43,056 ) Denominator Weighted-average number shares outstanding, basic and diluted 69,756 Net loss per share attributable to shareholders, basic and diluted $ (0.62 ) The following table sets forth the computation of the Company’s basic and diluted net loss per unit for the period from January 1, 2023 through June 7, 2023 (Predecessor), and for the year ended December 31, 2022 (Predecessor), respectively: Period from Year Ended Numerator Net loss $ (34,176 ) $ (54,778 ) Net loss attributable to membership interest holders $ (34,176 ) $ (54,778 ) Denominator Weighted-average number membership interests outstanding, basic and diluted 3,767 3,703 Net loss per unit attributable to membership interest holders, basic and diluted $ (9.07 ) $ (14.79 )

Shareholders_ Equity and Non-_2

Shareholders’ Equity and Non-Controlling Interest (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Shareholders’ Equity and Non-Controlling Interest [Abstract]
Schedule of Net Loss before Income Tax Attributable to Redeemable Non-Controlling Interest	The table below demonstrates the calculation of net loss before income tax attributable to redeemable non -controlling March 31, Net Loss before income tax $ (45,670 ) Redeemable non-controlling interest percentage – Class A OpCo Units 66.2 % Net Loss before income tax attributable to Class A OpCo Units $ (29,773 )	The table below demonstrates the calculation of net loss before income tax attributable to redeemable non -controlling Period from Net Loss before income tax $ (147,523 ) Redeemable non-controlling interest percentage – Class A OpCo Units 67.0 % Net Loss before income tax attributable to Class A OpCo Units $ (98,760 )

Share-Based Payments (Tables)

Share-Based Payments (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Share-Based Payments [Abstract]
Schedule of Equity Awards Activity	The following table presents a summary of employee equity awards comprised of Class A OpCo Units and the corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed included in the condensed consolidated statements of operations and comprehensive loss: Quantity Calculated Value March 31, March 31, March 31, March 31, Unvested, beginning of period 848,415 226,494 $ 5.21 $ 63.25 Granted — — $ — $ — Forfeited — — $ — $ — Vested — — $ — $ — Accelerated — — $ — $ — Unvested, end of period 848,415 226,494 $ 5.21 $ 63.25	The following table presents a summary of employee equity awards comprised of Class A OpCo Units and the corresponding quantity of shares of Class B Common Stock outstanding, granted, forfeited, vested on an accelerated basis and redeemed during the current year -to-date Quantity Calculated Value Period from Period from Period from Period from Unvested, beginning of period 1,895,122 226,494 $ 4.95 $ 63.25 Granted — — $ — $ — Forfeited (324,568 ) — $ 5.66 $ — Vested (30,069 ) (107,418 ) $ 4.32 $ 63.18 Accelerated (692,070 ) — $ 4.32 $ — Unvested, end of period 848,415 119,076 $ 4.62 $ 63.32
Schedule of Summary of RSU’s Outstanding, Granted, Forfeited, Vested and Accelerated During the Period	The following table presents a summary of RSU’s outstanding, granted, forfeited, vested and accelerated during the three months ended March 31, 2024 (Successor): Quantity Fair Value Unvested, beginning of period 443,221 $ 13.13 Granted 71,200 $ 9.26 Forfeited — $ — Vested — $ — Accelerated (10,000 ) $ 13.23 Unvested, end of period 504,421 $ 12.85	The following table presents a summary of RSU’s outstanding, granted, forfeited, vested and accelerated during the period from; June 8, 2023 through December 31, 2023 (Successor): Quantity Fair Value Unvested, beginning of period — $ — Granted 443,221 $ 13.43 Forfeited — $ — Vested — $ — Accelerated — $ — Unvested, end of period 443,221 $ 13.43
Schedule of Disaggregates the Variable Compensation Payable to BHES	The following table displays the fair value of shares distributed as payment for services rendered by BHES under the terms of the BHES JDA during the three -month Quantity Total Fair Value March 31, March 31, March 31, March 31, Equivalent (1) Membership Interests — 9,210 $ — $ 1,943 $ 168.75 Class A OpCo Units 650,248 — 4,298 — $ 5.29 Class B Common Stock 650,248 — — — $ — Total $ 4,298 $ 1,943 (1)	The table below displays the fair value of shares distributed as payment for services rendered by BHES under the terms of the BHES JDA. Quantity Total Fair Value Period from Period from Period from Period from Equivalent (1) Membership Interests — 9,210 $ — $ 1,943 $ 168.75 Class A OpCo Units 1,236,265 296,160 8,172 1,958 $ 5.29 Class B Common Stock 1,236,265 296,160 — — $ — Total $ 8,172 $ 3,901 (1)
Schedule of Disaggregates the Variable Compensation Payable to BHES		The following table disaggregates the variable compensation payable to BHES should it meet its milestone objectives: Performance Compensation Remaining Total BHES JDA – variable share-based payments January, 2027 $ 21,167 $ 6,178 $ 27,345
Schedule of Disaggregates the Variable Compensation Payable to BHES	The following table disaggregates the variable compensation payable to BHES should it meet its milestone objectives: Performance Compensation Remaining Total BHES JDA – variable share-based payments January 2027 $ 21,777 $ 5,568 $ 27,345

Leases (Tables)

Leases (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Leases [Abstract]
Schedule of Future Minimum Lease Payments	The following table presents the future minimum lease payments that the Company expects to make under its operating leases as of March 31, 2024 (Successor): Year Future 2024 $ 379 2025 517 2026 531 2027 544 2028 511 2029 and thereafter — Total $ 2,482	The following table presents the future minimum lease payments that the Company expects to make under its operating leases: Year Future 2024 $ 504 2025 517 2026 531 2027 545 2028 512 2029 and thereafter — Total $ 2,608

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Commitments and Contingencies [Abstract]
Schedule of Asset Retirement Obligations	The following table reconciles the beginning and ending balances of the asset retirement obligation as of the dates presented: March 31, March 31, Asset retirement obligation, beginning of period $ 2,060 $ 2,416 Obligation incurred — — Accretion expense 43 59 Asset retirement obligation, end of period $ 2,103 $ 2,475	The following table reconciles the beginning and ending balances of the asset retirement obligation for each period presented: Period from Period from Year Ended Asset retirement obligation, beginning of period $ 1,967 $ 2,416 $ — Obligation incurred — — 2,201 Periodic accretion expense 93 102 215 Asset retirement obligation, end of period $ 2,060 $ 2,518 $ 2,416
Schedule of Unrecognized Purchase Commitments	The following table presents the Company’s material, unrecognized purchase obligations as of the periods described: Commitment Consideration Type Gross Commitment March 31, 2024 (Successor) Prior Predecessor/ Remaining Commitment Asset purchase commitments Cash $ 26,009 $ 1,372 $ 5,191 $ 19,446 BHES JDA Cash 70,000 3,438 11,868 54,694 BHES JDA Share-Based 70,000 3,438 11,868 54,694 Total $ 166,009 $ 8,248 $ 28,927 $ 128,834	The following table presents the Company’s material, unrecognized purchase obligations: Commitment Consideration Gross Commitment Period from Period from Prior Remaining Asset purchase commitments Cash $ 26,009 $ 4,023 $ 1,168 $ — $ 20,818 BHES JDA Cash 70,000 6,536 3,121 2,211 58,132 BHES JDA Share-Based 70,000 6,536 3,121 2,211 58,132 Total $ 166,009 $ 17,095 $ 7,410 $ 4,422 $ 137,082
Schedule of Costs Associated	The following table presents the costs associated with the BHES JDA included in the condensed consolidated statements of operations and comprehensive loss: March 31, March 31, Cash expense $ 3,438 $ 1,554 Membership interests issued — 1,943 Class A OpCo Units issued 4,298 — BHES JDA Bonus Share expense 610 2,688 Total research and development attributable to BHES JDA $ 8,346 $ 6,185	The following table presents the costs associated with the BHES JDA during the periods presented: Period from June 8 – January 1 – January 1 – Cash expense $ 6,536 $ 3,121 $ 2,211 Membership interests issued — 3,902 2,765 Class A OpCo Units issued 8,172 — — BHES Bonus Share expense 6,620 4,690 9,857 Total research and development attributable to BHES JDA $ 21,328 $ 11,713 $ 14,833

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Taxes [Abstract]
Schedule of Current and Deferred Income Taxes	The following table presents the components of the Company’s current and deferred income taxes: June 8 – Federal Current tax expense (benefit) $ — Deferred tax expense (benefit) (5,542 ) Total federal (5,542 ) State and local Current tax expense (benefit) — Deferred tax expense (benefit) (165 ) Total state and local (165 ) Total $ (5,707 )
Schedule of Effective Income Tax Rate Reconciliation	The following table presents the Company’s effective income tax rate during the period from June 8, 2023 through December 31, 2023 (Successor): June 8 – U.S. federal statutory rate 21.0 % Increase (decrease) due to: State income taxes, net of federal income tax benefit 0.1 % Non-controlling interests (14.1 )% Equity transactions (3.8 )% Other permanent adjustments (0.5 )% Change in investment in OpCo (2.5 )% Valuation allowance 3.7 % Effective tax rate 3.9 %
Schedule of Temporary Differences Arising from Deferred Income Taxes	The following table presents the effects of temporary differences arising from deferred income taxes as of December 31, 2023 (Successor): December 31, Deferred tax assets Federal net operating losses $ 1,976 State net operating losses 186 Investment in OpCo 62,972 Deferred tax assets, gross 65,134 Valuation allowance (62,972 ) Deferred tax assets, net 2,162 Deferred tax liabilities Property, plant and equipment and developed technology (59,881 ) Deferred tax liabilities, gross (59,881 ) Deferred tax liabilities, net $ (57,719 )

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2024
Investments [Abstract]
Schedule of Available-For-Sale Securities	The following table presents the Company’s available -for-sale March 31, 2024 Current assets Amortized Unrealized Gain Fair Corporate bonds $ 9,900 $ 78 $ 9,978 Commercial paper 23,641 199 23,840 U.S. treasuries 35,214 158 35,372 Total $ 68,755 $ 435 $ 69,190 Long-term assets Amortized Unrealized Gain Fair Corporate bonds $ 2,900 $ 30 $ 2,930 U.S. treasuries 24,666 197 24,863 Total $ 27,566 $ 227 $ 27,793

Nature of Business and Basis _2

Nature of Business and Basis of Presentation (Details)	Dec. 31, 2023
NET Power, Inc. [Member]
Nature of Business and Basis of Presentation (Details) [Line Items]
Ownership interest	50%

Significant Accounting Polici_3

Significant Accounting Policies (Details)	7 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Significant Accounting Policies (Details) [Line Items]
Operating segment		1
Reportable segment		1
Line of business		1
Successor		Successor
Held cash in excess of FDIC limits	$ 334,289,000	$ 334,289,000	$ 4,644,000
Cash equivalents	$ 202,138,000	$ 202,138,000
Percentage of tax receivable	0.75	0.75
Impairment charges		$ 0
Impairment charges	$ 0
Plant’s expected useful life	7 years	7 years
Technology-Based Intangible Assets [Member]
Significant Accounting Policies (Details) [Line Items]
Amortizes of useful life	20 years	20 years

Significant Accounting Polici_4

Significant Accounting Policies (Details) - Schedule of Property, Plant, and Equipment Useful Life	Dec. 31, 2023
Furniture and Equipment [Member]
Schedule of Property, Plant, and Equipment Useful Life [Line Items]
Useful Life	7 years
Minimum [Member] | Furniture and Equipment [Member]
Schedule of Property, Plant, and Equipment Useful Life [Line Items]
Useful Life	4 years
Maximum [Member] | Demonstration Plant [Member]
Schedule of Property, Plant, and Equipment Useful Life [Line Items]
Useful Life	7 years

Business Combination (Details)

Business Combination (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Jun. 07, 2023	Jun. 18, 2021	Dec. 31, 2023
OpCo [Member]
Business Combination (Details) [Line Items]
Generated Expenses (in Dollars)	$ 121,883
Acquirer expenses (in Dollars)	16,021
Profits interests (in Dollars)	325		$ 325
Consideration transferred (in Dollars)	651		651
Deferred tax liabilities (in Dollars)	71,426		71,426
Cash net of certain expenses (in Dollars)	661,623
Purchase consideration transferred (in Dollars)	$ 1,786,259		$ 1,786,259
OpCo [Member] | Public Warrant [Member]
Business Combination (Details) [Line Items]
warrant shares	8,624,974
Exercisable warrant shares	8,624,974
Share price per share (in Dollars per share)	$ 11.5
Warrant price per share (in Dollars per share)	$ 0.01
warrant expiry term	5 years
OpCo [Member] | Private Warrant [Member]
Business Combination (Details) [Line Items]
warrant shares	10,900,000
Exercisable warrant shares	10,900,000
Share price per share (in Dollars per share)	$ 11.5
warrant expiry term	5 years
Common Class B [Member] | OpCo [Member]
Business Combination (Details) [Line Items]
Converted shares	136,073,365
Vested and unvested shares	1,119,198
Common Class A [Member] | OpCo [Member]
Business Combination (Details) [Line Items]
Converted shares	136,073,365
Vested and unvested shares	1,119,198
Common Class A [Member] | Share Price Equals Or Exceeds Eighteen U.S. Dollars [Member] | OpCo [Member] | Public Warrant [Member]
Business Combination (Details) [Line Items]
Price per share (in Dollars per share)	$ 18
Common Class A [Member] | Share Price Equals Or Exceeds Ten U.S. Dollars [Member] | OpCo [Member] | Public Warrant [Member]
Business Combination (Details) [Line Items]
Price per share (in Dollars per share)	10
Common Class A [Member] | Share Price Is Below Eighteen U.S. Dollars [Member] | OpCo [Member] | Public Warrant [Member]
Business Combination (Details) [Line Items]
Price per share (in Dollars per share)	$ 18
IPO [Member] | RONI [Member]
Business Combination (Details) [Line Items]
Gross Proceeds (in Dollars)		$ 345,000
IPO [Member] | Common Class A [Member] | OpCo [Member]
Business Combination (Details) [Line Items]
Shares issued	67,352,271

Business Combination (Details)

Business Combination (Details) - Schedule of Consideration Transferred - OpCo [Member] - USD ($) $ in Thousands		12 Months Ended
	Jun. 07, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Pre-combination vesting of modified profits interests	$ 325	$ 325
Pre-combination vesting of unmodified profits interests	651	651
Consideration transferred to sellers		976
Class A OpCo Units – non-controlling interests		1,785,283
Fair value of total consideration transferred	$ 1,786,259	$ 1,786,259

Business Combination (Details_2

Business Combination (Details) - Schedule of Assets and Liabilities Assumed - OpCo [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 07, 2023
Current assets
Cash	$ 7,946
Prepaid expenses	637
Other current assets	30
Total current assets	8,613
Long-term assets
Intangible assets, net	1,345,000
Property, plant and equipment	91,855
Right-of-use assets	940
Total long-term assets	1,437,795
Total assets acquired	1,446,408
Current liabilities
Accounts payable	2,574
Accrued liabilities	7,370
Current lease liability	137
Other current liabilities	1
Total current liabilities	10,082
Long-term liabilities
Deferred tax liability	71,426	$ 71,426
Asset retirement obligation	1,967
Long-term lease liability	594
Total long-term liabilities	73,987
Total liabilities assumed	84,069
Total identifiable net assets	1,362,339
Goodwill	423,920
Net assets acquired	$ 1,786,259

Business Combination (Details_3

Business Combination (Details) - Schedule of Pro Forma Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Pro Forma Information Abstract
Pro forma revenue	$ 175	$ 580
Pro forma net loss	(205,387)	(121,652)
Pro forma net loss attributable to non-redeemable controlling interest	(67,778)	(40,145)
Pro forma net loss attributable to non-redeemable non-controlling interests	$ (137,609)	$ (81,507)

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets [Abstract]
Effects of changes to deferred tax liability				$ (9,816)	$ (9,816)
Amortization expense	$ 16,812	$ 5	$ 9	$ 37,735		$ 22

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets (Details) - Schedule of Goodwill - USD ($) $ in Thousands	3 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2023
Schedule of Goodwill [Abstract]
Goodwill at beginning	$ 423,920	$ 433,736
Measurement Adjustments		(9,816)	(9,816)
Goodwill at ending	$ 423,920	$ 423,920	$ 423,920

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets (Details) - Schedule of Definite lived Intangible Assets - Developed Technology Rights [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Developed technology, gross	$ 1,345,000	$ 1,345,000	$ 604
Accumulated amortization	(54,547)	(37,735)	(341)
Developed technology, net	$ 1,290,453	$ 1,307,265	$ 263

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets (Details) - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2024	$ 67,250	$ 67,250
2025	67,250	67,250
2026	67,250	67,250
2027	67,250	67,250
2028	67,250	67,250
2029 and thereafter		971,015
Total	$ 1,290,453	$ 1,307,265

Property, Plant and Equipment_2

Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Member]
Depreciation expense	$ 3,176	$ 3,268	$ 5,700	$ 7,146	$ 7,146	$ 13,149

Property, Plant and Equipment_3

Property, Plant and Equipment (Details) - Schedule of Property, Plant and Equipment - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 111,420	$ 104,002	$ 128,381
Accumulated depreciation	(10,321)	(7,146)	(58,786)
Total property, plant and equipment, net	101,099	96,856	69,595
Furniture and equipment, gross [Member]
Schedule of Property, Plant and Equipment [Line Items]
property, plant and equipment		320	368
Total property, plant and equipment, gross	328	320
Demonstration Plant, gross [Member]
Schedule of Property, Plant and Equipment [Line Items]
property, plant and equipment		89,241	128,013
Total property, plant and equipment, gross	89,239	89,239
Construction in progress [Member]
Schedule of Property, Plant and Equipment [Line Items]
property, plant and equipment		14,441
Total property, plant and equipment, gross	$ 21,853	$ 14,443

Accrued Liabilities (Details) -

Accrued Liabilities (Details) - Schedule of Accrued Liabilities - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Accrued Liabilities [Abstract]
Accrued incentive compensation	$ 819	$ 2,016	$ 1,451
Accrued cash-based expense of BHES JDA		3,669
Accrued legal service provider fees	241	160	713
Accrued capital expenditures	1,721	3,605
Other accrued liabilities	$ 992	1,465	228
Total accrued liabilities		$ 10,915	$ 2,392

Revenue and Accounts Receivab_3

Revenue and Accounts Receivable (Details) - USD ($)	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Revenue and Accounts Receivable [Abstract]
Provision for credit losses			$ 352,000	$ 0	$ 0

Revenue and Accounts Receivab_4

Revenue and Accounts Receivable (Details) - Schedule of Revenue Streams - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue		$ 50	$ 175		$ 580
Feasibility Studies [Member]
Disaggregation of Revenue [Line Items]
Total revenue		50	175		125
Test Data Sales [Member]
Disaggregation of Revenue [Line Items]
Total revenue					150
Testing Services [Member]
Disaggregation of Revenue [Line Items]
Total revenue					$ 305

Revenue and Accounts Receivab_5

Revenue and Accounts Receivable (Details) - Schedule of Accounts Receivable - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Accounts Receivable Abstract
Accounts receivable, gross		$ 58	$ 58	$ 352
Allowance for doubtful accounts
Accounts receivable, net		$ 58	$ 58	$ 352

Related Party Transactions (Det

Related Party Transactions (Details) - Related Party [Member] - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Related Party Transactions (Details) [Line Items]
Current liabilities payable	$ 302	$ 142		$ 142	$ 142	$ 178
Cost incurred			$ 177	84		504
Long term liabilities payable						2,212
Shareholders owned an option (in Shares)				711,111	711,111
Marketing, Patent Administration, And Technology Maintenance Services [Member]
Related Party Transactions (Details) [Line Items]
Cost incurred services	26	34	79	$ 84		247
General Business Oversight [Member]
Related Party Transactions (Details) [Line Items]
Cost incurred services	$ 267	278	530	643		984
Engineering Support Provided By Former Board Member [Member]
Related Party Transactions (Details) [Line Items]
Cost incurred		$ 76	$ 97			$ 230
Occidental Petroleum [Member]
Related Party Transactions (Details) [Line Items]
Shareholders owned an option (in Shares)				247,655	247,655
Exchange for retiring purchase option				$ 79,054	$ 79,054
Interests converted (in Shares)					7,905,279

Related Party Transactions (D_2

Related Party Transactions (Details) - Schedule of Related Party Amounts on the Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Condensed Financial Statements, Captions [Line Items]
Due to related parties – current		$ 142		$ 178
Due to related parties – long-term				2,212
Amounts due to related parties under BHES JDA [Member]
Condensed Financial Statements, Captions [Line Items]
Due to related parties – current	$ 302	142	$ 142	178
Due to related parties – long-term				$ 2,212

Related Party Transactions (D_3

Related Party Transactions (Details) - Schedule of Related Party Amounts on the Consolidated Statement of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Option settlement – related party			$ 79,054
Related Party [Member]
Related Party Transaction [Line Items]
Cost of revenue				86
General and administrative		177	84	504
Research and development		12,243	643	15,817
MSA costs related to testing services [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Cost of revenue				86
MSA administrative costs [Member] | Related Party [Member]
Related Party Transaction [Line Items]
General and administrative		79	84	247
Engineering support provided by former board member [Member] | Related Party [Member]
Related Party Transaction [Line Items]
General and administrative	$ 76	97		230
Engineering services provided by former investor [Member] | Related Party [Member]
Related Party Transaction [Line Items]
General and administrative				27
MSA costs for Demonstration Plant [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Research and development		530	643	984
BHES JDA [Member] | Related Party [Member]
Related Party Transaction [Line Items]
Research and development		$ 11,713		$ 14,833

Fair Value Measurements (Detail

Fair Value Measurements (Details) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended	5 Months Ended	12 Months Ended
	Feb. 03, 2022	Feb. 03, 2023 USD ($)	Mar. 31, 2023 USD ($) shares	Jun. 07, 2023 USD ($)	Dec. 31, 2023 $ / shares	Mar. 31, 2024
Fair Value Measurements (Details) [Line Items]
Purchase an aggregate (in Shares) | shares			34,588
Total proceeds (in Dollars)		$ 5,836	$ 5,836
Exercise their options	1 year
Option holders exercised			2
Loans [Member]
Fair Value Measurements (Details) [Line Items]
Loan options (in Dollars)			$ 30	$ 30
Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Risk free rate					3.80%
Volatility Rate					39.40%
Expected Term					5 years
Strike price (in Dollars per share) | $ / shares					$ 11.5
Measurement Input, Expected Term [Member] | Monte Carlo Simulation [Member]
Fair Value Measurements (Details) [Line Items]
Risk-free rate					3
Measurement Input, Expected Term [Member] | Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Closing price						5
Measurement Input, Risk Free Interest Rate [Member] | Monte Carlo Simulation [Member]
Fair Value Measurements (Details) [Line Items]
Risk-free rate					0.041	0.045
Measurement Input, Risk Free Interest Rate [Member] | Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Closing price						0.042
Measurement Input, Operating Asset Volatility [Member] | Monte Carlo Simulation [Member]
Fair Value Measurements (Details) [Line Items]
Risk-free rate					0.385	0.373
Measurement Input, Offered Price [Member] | Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Closing price					10.1	11.39
Measurement Input, Price Volatility [Member] | Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Closing price						0.381
Measurement Input, Strike Price [Member] | Black-Scholes-Merton Model [Member]
Fair Value Measurements (Details) [Line Items]
Closing price						11.5

Fair Value Measurements (Detai

Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets	$ 100,000
Liabilities	57,591	$ 5,174
Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets
Liabilities	18,969
Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets	100,000
Liabilities
Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets
Liabilities	38,622	5,174
Public Warrant [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	18,969
Public Warrant [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	18,969
Public Warrant [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Public Warrant [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Private Warrant [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	36,951
Private Warrant [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Private Warrant [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Private Warrant [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	36,951
Earnout Shares [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	1,671
Earnout Shares [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Earnout Shares [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Earnout Shares [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities	1,671
Short-Term Investments [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets	100,000
Short-Term Investments [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets
Short-Term Investments [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets	100,000
Short-Term Investments [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Assets
Option Liability [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities		5,174
Option Liability [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Option Liability [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities
Option Liability [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis [Line Items]
Liabilities		$ 5,174

Fair Value Measurements (Det_2

Fair Value Measurements (Details) - Schedule of Reconciliation of the beginning and Ending Balances of Recurring Level 3 Fair Value Measurements - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance of recurring level 3 liabilities at beginning of period	$ 38,622	$ 5,174	$ 5,174	$ 63,851	$ 1,459
Change in Earnout Shares liability and Warrant liability	8,542
Issuances				(9,055)
Payments		(5,174)	(5,174)
Balance of recurring level 3 liabilities at end of period	$ 47,164			38,622	5,174
Other Expense [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in Earnout Shares liability and Warrant liability				(16,174)
Interest Expense [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in Option liability					$ 3,715

Net Loss per Share_Unit (Detail

Net Loss per Share/Unit (Details) - Schedule of Diluted Net Loss Per Unit - shares	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	164,547,131	226,494	119,076	164,515,242	972,193
Public Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	8,622,235			8,622,235
Private Placement Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument				10,900,000
Earnout Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	328,925			328,925
BHES Bonus Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument				2,068,416
Common Stock [Member] | Common Class A, Unvested [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	848,415			848,415
Common Stock [Member] | Common Class A [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	141,274,719			141,304,030
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument	504,421			443,221
Unvested Profits Interest [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument		226,494	119,076		226,494
Member Loan Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument					34,588
Occidental Petroleum Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive instrument					711,111

Net Loss per Share_Unit (Deta_2

Net Loss per Share/Unit (Details) - Schedule of Basic and Diluted Net Loss Per Share - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		5 Months Ended		7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Numerator
Net loss	$ (41,632)	$ (17,067)	$ (34,176)		$ (141,816)	$ (141,816)	$ (54,778)
Net loss attributable to shareholders	$ (11,422)					$ (43,056)
Weighted-average number shares outstanding, basic (in Shares)	71,895					69,756
Net loss per share attributable to shareholders, basic (in Dollars per share)	$ (0.16)					$ (0.62)
Previously Reported [Member]
Numerator
Net loss		(17,067)		$ (34,176)			(54,778)
Net loss attributable to shareholders		$ (17,067)		$ (34,176)			$ (54,778)
Weighted-average number shares outstanding, basic (in Shares)		3,748		3,767			3,703
Net loss per share attributable to shareholders, basic (in Dollars per share)		$ (4.55)		$ (9.07)			$ (14.79)

Net Loss per Share_Unit (Deta_3

Net Loss per Share/Unit (Details) - Schedule of Basic and Diluted Net Loss Per Share (Parentheticals) - $ / shares	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Net Loss per Share/Unit (Details) - Schedule of Basic and Diluted Net Loss Per Share (Parentheticals) [Line Items]
Weighted-average number shares outstanding, diluted (in Shares)	71,895			69,756
Net loss per share attributable to shareholders, diluted (in Dollars per share)	$ (0.16)			$ (0.62)
Previously Reported [Member]
Net Loss per Share/Unit (Details) - Schedule of Basic and Diluted Net Loss Per Share (Parentheticals) [Line Items]
Weighted-average number shares outstanding, diluted (in Shares)		3,748	3,767		3,703
Net loss per share attributable to shareholders, diluted (in Dollars per share)		$ (4.55)	$ (9.07)		$ (14.79)

Shareholders_ Equity and Non-_3

Shareholders’ Equity and Non-Controlling Interest (Details)		3 Months Ended	7 Months Ended	12 Months Ended
	Jun. 23, 2023	Mar. 31, 2024 $ / shares shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2023 $ / shares shares	Aug. 16, 2023	Mar. 31, 2023 shares	Dec. 31, 2022 $ / shares shares
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Authorized shares		831,000,000	831,000,000	831,000,000
Authorized shares of preferred stock		1,000,000	1,000,000	1,000,000			1,000,000
Preferred stock par value (in Dollars per share) | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001			$ 0.0001
Authorized shares of class A common stock						4,987,845
Outstanding shares
Common stock						3,763,224
Trading days	30
Converted unit					1
Common unit, authorized							4,987,845
Common unit, issued							3,722,355
Common unit, outstanding							3,722,355
Common stock share issued						3,763,224
Share-Based Payment Arrangement, Tranche One [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Trading days	30
Share-Based Payment Arrangement, Tranche Two [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Trading days	30
Price Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Class OpCo Units			1,575,045	1,575,045
Closing date				3 years
Class A OpCo units			14,848,184	14,848,184
Time-Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Closing date				1 year
Redeemable Preferred Stock [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Authorized shares			831,000,000	831,000,000
Common Class A [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Authorized shares of class A common stock		520,000,000	520,000,000	520,000,000			520,000,000
Common stock par value (in Dollars per share) | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001			$ 0.0001
Common stock		71,970,052	71,277,906	71,277,906
Number of voting			1	1
Non-controlling interest holders		66.20%	67%
Business combination of common shares			986,775	986,775
Equal tranches contingent			3	3
Common stock share issued		71,970,052	71,277,906	71,277,906
Common Class A [Member] | OpCo [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Company owns percentage		33.80%	33%	33%
Common Class A [Member] | Earnout Shares Vesting, Tranche One [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Common stock achieved (in Dollars per share) | $ / shares			$ 12	$ 12
Trading days				20
Common Class A [Member] | Earnout Shares Vesting, Tranche Two [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Common stock achieved (in Dollars per share) | $ / shares			$ 14	$ 14
Trading days				20
Common Class A [Member] | Earnout Shares Vesting, Tranche Three [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Common stock achieved (in Dollars per share) | $ / shares				$ 16
Trading days				20
Earnout term				3 years
Common Class A [Member] | OpCo [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Business combination of common shares			128,908,518	128,908,518
Class A OpCo units			328,925	328,925
Common Class A [Member] | NET Power, Inc. [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Business combination of common shares			54,047,495	54,047,495
Common Class A [Member] | Common Stock [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Redeemable non-controlling interests		140,624,471	140,610,089	140,610,089
Common Class A [Member] | Price Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Class OpCo Units			44,544,551	44,544,551
Trading days				20
Consecutive trading-day				30
Common Class A [Member] | Price Based Lockup Shares [Member] | Lockup Shares, Transfer Tranche One [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Price per share (in Dollars per share) | $ / shares			$ 12	$ 12
Common Class A [Member] | Price Based Lockup Shares [Member] | Lockup Shares, Transfer Tranche Two [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Price per share (in Dollars per share) | $ / shares			14	14
Common Class A [Member] | Price Based Lockup Shares [Member] | Lockup Shares, Transfer Tranche Three [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Price per share (in Dollars per share) | $ / shares			$ 16	$ 16
Common Class A [Member] | Time-Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Class OpCo Units			89,449,655	89,449,655
Trading days				20
Consecutive trading-day				30
Price per share (in Dollars per share) | $ / shares			$ 12	$ 12
Common Class B [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Authorized shares of class A common stock		310,000,000	310,000,000	310,000,000			310,000,000
Common stock par value (in Dollars per share) | $ / shares		$ 0.0001	$ 0.0001	$ 0.0001			$ 0.0001
Common stock		141,801,811	141,787,429	141,787,429
Number of voting			1	1
Business combination of common shares			6,072,463	6,072,463
Class OpCo Units			3,510,643	3,510,643
Common stock share issued		141,801,811	141,787,429	141,787,429
Common Class B [Member] | OpCo [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Business combination of common shares			7,624,999	7,624,999
Common Class B [Member] | Common Stock [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Redeemable non-controlling interests		6,967,050	6,967,050	6,967,050
Common Class B [Member] | Price Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Class OpCo Units			1,575,045	1,575,045
Common Class B [Member] | Time-Based Lockup Shares [Member]
Shareholders’ Equity and Non-Controlling Interest [Line Items]
Class OpCo Units			3,510,643	3,510,643

Shareholders_ Equity and Non-_4

Shareholders’ Equity and Non-Controlling Interest (Details) - Schedule of Net Loss before Income Tax Attributable to Redeemable Non-Controlling Interest - USD ($) $ in Thousands	3 Months Ended	7 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Shareholders’ Equity and Non-Controlling Interest (Details) - Schedule of Net Loss before Income Tax Attributable to Redeemable Non-Controlling Interest [Line Items]
Net Loss before income tax	$ (45,670)	$ (147,523)
Common Class A [Member]
Shareholders’ Equity and Non-Controlling Interest (Details) - Schedule of Net Loss before Income Tax Attributable to Redeemable Non-Controlling Interest [Line Items]
Redeemable non-controlling interest percentage – Class A OpCo Units	66.20%	67%
Net Loss before income tax attributable to Class A OpCo Units	$ (29,773)	$ (98,760)

Share-Based Payments (Details)

Share-Based Payments (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Jun. 08, 2023 USD ($) shares	Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($)
Share-Based Payments (Details) [Line Items]
Unrecognized share-based compensation expense (in Dollars) | $		$ 27,345,000	$ 2,352	$ 9,312
Weighted average period			3 years	1 year
Weighted average period		3 years
Restricted Share Units [Member]
Share-Based Payments (Details) [Line Items]
Unrecognized share-based compensation expense (in Dollars) | $		$ 5,201	$ 5,188
Weighted average period			3 years
Unvested shares
Weighted average period		3 years
Baker Hughes Energy Services LLC [Member]
Share-Based Payments (Details) [Line Items]
Expected discount issued (in Dollars) | $	$ 17,500	$ 17,500
Incurred inception losses (in Dollars) | $	$ 2,971	3,832
Common Class A [Member]
Share-Based Payments (Details) [Line Items]
Unrecognized share-based compensation expense (in Dollars) | $		$ 1,639
Common Class A [Member] | Baker Hughes Energy Services LLC [Member]
Share-Based Payments (Details) [Line Items]
Converted units	1,500,265	1,500,265
Common Class B [Member] | Baker Hughes Energy Services LLC [Member]
Share-Based Payments (Details) [Line Items]
Converted units		1,500,265
Omnibus Incentive Plan [Member] | Restricted Share Units [Member]
Share-Based Payments (Details) [Line Items]
Authorized issuance shares		504,421	443,221
Grant date period		3 years
Omnibus Incentive Plan [Member] | Common Class A [Member]
Share-Based Payments (Details) [Line Items]
Common Stock for issuance as equity awards			20,468,545
Aggregate number of shares outstanding			0.05
Joint Development Agreements [Member] | Baker Hughes Energy Services LLC [Member]
Share-Based Payments (Details) [Line Items]
Additional shares		47,000
Membership interests shares	47,000
OpCo [Member]
Share-Based Payments (Details) [Line Items]
Vesting shares	30,000
Compensation cost (in Dollars) | $	$ 1,624
Unvested shares	30,000
OpCo [Member] | Common Class A [Member]
Share-Based Payments (Details) [Line Items]
Additional shares	451,356
Number of shares	324,568

Share-Based Payments (Details)

Share-Based Payments (Details) - Schedule of Equity Awards Activity - $ / shares	5 Months Ended	7 Months Ended
	Jun. 07, 2023	Dec. 31, 2023
Common Stock [Member]
Share-Based Payments (Details) - Schedule of Equity Awards Activity [Line Items]
Quantity, unvested beginning		1,895,122
Calculated value, unvested ending		$ 4.95
Quantity, granted
Calculated value, granted
Quantity, forfeited		(324,568)
Calculated value, forfeited		$ 5.66
Quantity, vested		(30,069)
Calculated value, vested		$ 4.32
Quantity, accelerated		(692,070)
Calculated value, accelerated		$ 4.32
Quantity, unvested ending	1,895,122	848,415
Calculated value, unvested ending	$ 4.95	$ 4.62
Member Units [Member]
Share-Based Payments (Details) - Schedule of Equity Awards Activity [Line Items]
Quantity, unvested beginning	226,494	119,076
Calculated value, unvested ending	$ 63.25	$ 63.32
Quantity, granted
Calculated value, granted
Quantity, forfeited
Calculated value, forfeited
Quantity, vested	(107,418)
Calculated value, vested	$ 63.18
Quantity, accelerated
Calculated value, accelerated
Quantity, unvested ending	119,076
Calculated value, unvested ending	$ 63.32

Share-Based Payments (Details_2

Share-Based Payments (Details) - Schedule of Summary of RSU’s Outstanding, Granted, Forfeited, Vested and Accelerated During the Period - Common Stock [Member] - Restricted Stock Units (RSUs) [Member]	7 Months Ended
	Dec. 31, 2023 $ / shares shares
Share-Based Payments (Details) - Schedule of Summary of RSU’s Outstanding, Granted, Forfeited, Vested and Accelerated During the Period [Line Items]
Quantity, unvested beginning | shares
Fair value, unvested beginning | $ / shares
Quantity, granted | shares	443,221
Fair value, granted | $ / shares	$ 13.43
Quantity, forfeited | shares
Fair value, forfeited | $ / shares
Quantity, vested | shares
Fair value, vested | $ / shares
Quantity, accelerated | shares
Fair value, accelerated | $ / shares
Quantity, unvested ending | shares	443,221
Fair value, unvested ending | $ / shares	$ 13.43

Share-Based Payments (Details_3

Share-Based Payments (Details) - Schedule of Fair Value of Shares Distributed as Payment for Services Rendered - Baker Hughes Energy Services LLC [Member] - USD ($)	3 Months Ended			5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024		Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	[2]
Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)	$ 168.75	[1]				$ 168.75
Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)	5.29	[1]				5.29
Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)		[1]
Successor [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total Fair Value	$ 4,298				$ 8,172,000
Successor [Member] | Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)
Total Fair Value
Successor [Member] | Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)	650,248				1,236,265,000
Total Fair Value	$ 4,298				$ 8,172,000
Successor [Member] | Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)	650,248				1,236,265,000
Total Fair Value
Predecessor [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total Fair Value			$ 1,943	$ 3,901,000
Predecessor [Member] | Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)			9,210	9,210,000
Total Fair Value			$ 1,943	$ 1,943,000
Predecessor [Member] | Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)				296,160,000
Total Fair Value				$ 1,958,000
Predecessor [Member] | Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)				296,160,000
Total Fair Value
[1]The Equivalent Value per Unit is the discounted price per membership interest or per share stipulated in the BHES JDA[2]The Equivalent Value per Unit is the discounted price per membership interest or per share stipulated in the BHES JDA.

Share-Based Payments (Details_4

Share-Based Payments (Details) - Schedule of Disaggregates the Variable Compensation Payable to BHES - BHES JDA – Variable Share-Based Payments [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Share-Based Payments (Details) - Schedule of Disaggregates the Variable Compensation Payable to BHES [Line Items]
Performance Period End Date	January, 2027
Compensation Cost Incurred To Date	$ 21,167
Remaining Compensation Cost	6,178
Total Compensation Cost	$ 27,345

Leases (Details)

Leases (Details)		3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 08, 2024	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Jun. 07, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Feb. 28, 2024	Oct. 06, 2023	Jun. 06, 2022
Leases [Line Items]
Number of lease					2	2
Lease cost		$ 128,000	$ 49,000	$ 260,000	$ 85,000		$ 95,000
Incremental borrowing rate										8%
Right-of-use assets		2,120,000			2,212,000	$ 2,212,000	$ 784,000
Measurement Building Lease [Member]
Leases [Line Items]
Original lease term										60 months
Roney St. Lease [Member]
Leases [Line Items]
Original lease term									62 months
Lease liabilities		2,092,000			2,155,000	2,155,000
Right-of-use assets		$ 1,974,000			$ 2,059,000	$ 2,059,000
Lease termination		50 months			50 months	50 months
Land [Member]
Leases [Line Items]
Original lease term	60 months
Right-of-use assets					$ 153,000	$ 153,000
Lease payment						$ 1
Consecutive periods	3
Renewal periods	10 years
Atlas Tower Lease [Member]
Leases [Line Items]
Original lease term								68 months
Lease termination		44 months

Leases (Details) - Schedule of

Leases (Details) - Schedule of Future Minimum Lease Payments - Roney St. Lease [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases (Details) - Schedule of Future Minimum Lease Payments [Line Items]
2024	$ 517	$ 504
2025	531	517
2026	544	531
2027	511	545
2028		512
2029 and thereafter
Total	$ 2,482	$ 2,608

Commitments and Contingencies_2

Commitments and Contingencies (Details)	Jun. 07, 2023
Commitments and Contingencies [Abstract]
Percentage of ownership fell down	5%

Commitments and Contingencies_3

Commitments and Contingencies (Details) - Schedule of Asset Retirement Obligations - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Asset Retirement Obligations [Abstract]
Asset retirement obligation, beginning of period	$ 2,060	$ 2,416	$ 2,416	$ 1,967
Obligation incurred					2,201
Periodic accretion expense	43	59	102	93	215
Asset retirement obligation, end of period	$ 2,103	$ 2,475	$ 2,518	$ 2,060	$ 2,416

Commitments and Contingencies_4

Commitments and Contingencies (Details) - Schedule of Unrecognized Purchase Commitments - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Unrecognized Purchase Commitments [Line Items]
Gross Commitment	$ 166,009		$ 166,009	$ 166,009
Unrecorded unconditional purchase obligation, recognized in current period	8,248	$ 7,410	17,095	28,927	$ 4,422
Remaining Commitment	128,834		137,082	137,082
Joint Development Agreements, Paid In Cash [Member]
Schedule of Unrecognized Purchase Commitments [Line Items]
Gross Commitment	70,000		70,000	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,438	3,121	6,536	11,868	2,211
Remaining Commitment	54,694		58,132	58,132
Joint Development Agreements, Paid In Share-Based Payments [Member]
Schedule of Unrecognized Purchase Commitments [Line Items]
Gross Commitment	70,000		70,000	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,438	3,121	6,536	11,868	2,211
Remaining Commitment	54,694		58,132	58,132
Cash [Member] | Asset Purchase Commitment [Member]
Schedule of Unrecognized Purchase Commitments [Line Items]
Gross Commitment	26,009		26,009	26,009
Unrecorded unconditional purchase obligation, recognized in current period	1,372	$ 1,168	4,023	5,191
Remaining Commitment	$ 19,446		$ 20,818	$ 20,818

Commitments and Contingencies_5

Commitments and Contingencies (Details) - Schedule of Costs Associated - Baker Hughes Energy Services LLC [Member] - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Costs Associated [Line Items]
Cash expense	$ 3,438	$ 1,554	$ 3,121	$ 6,536	$ 2,211
BHES Bonus Share expense	610	2,688	4,690	6,620	9,857
Total research and development attributable to BHES JDA	8,346	6,185	11,713	21,328	14,833
Membership interests issued [Member]
Schedule of Costs Associated [Line Items]
Membership interests issued		1,943	3,902		2,765
Class A OpCo Units issued		$ 1,943	3,902		2,765
Class A OpCo Units issued [Member]
Schedule of Costs Associated [Line Items]
Membership interests issued	4,298			8,172
Class A OpCo Units issued	$ 4,298			$ 8,172

Income Taxes (Details)

Income Taxes (Details) - USD ($)	3 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2023	Jun. 08, 2023	Dec. 31, 2022
Income Taxes [Abstract]
Deferred tax asset		$ 2,162,000	$ 2,162,000	$ 77,700,000
Change in the valuation allowance		14,728,000
Unrecognized tax benefits		0	0
Recorded a liability	$ 10,099,000	$ 8,937,000	8,937,000
Effective tax rate	8.11%	3.90%
Deferred income tax benefit	$ (4,038,000)		$ (5,707,000)

Income Taxes (Details) - Schedu

Income Taxes (Details) - Schedule of Current and Deferred Income Taxes - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Current And Deferred Income Taxes Abstract
Current tax expense (benefit)
Deferred tax expense (benefit)		(5,542)
Total federal		(5,542)
Current tax expense (benefit)
Deferred tax expense (benefit)		(165)
Total state and local		(165)
Total	$ (4,038)	$ (5,707)

Income Taxes (Details) - Sche_2

Income Taxes (Details) - Schedule of Effective Income Tax Rate Reconciliation	3 Months Ended	7 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Effective Income Tax Rate Reconciliation Abstract
U.S. federal statutory rate		21%
State income taxes, net of federal income tax benefit		0.10%
Non-controlling interests		(14.10%)
Equity transactions		(3.80%)
Other permanent adjustments		(0.50%)
Change in investment in OpCo		(2.50%)
Valuation allowance		3.70%
Effective tax rate	8.11%	3.90%

Income Taxes (Details) - Sche_3

Income Taxes (Details) - Schedule of Temporary Differences Arising from Deferred Income Taxes - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 08, 2023
Schedule Of Temporary Differences Arising From Deferred Income Taxes Abstract
Federal net operating losses	$ 1,976
State net operating losses	186
Investment in OpCo	62,972
Deferred tax assets, gross	65,134
Valuation allowance	(62,972)
Deferred tax assets, net	2,162	$ 77,700
Property, plant and equipment and developed technology	(59,881)
Deferred tax liabilities, gross	(59,881)
Deferred tax liabilities, net	$ (57,719)

Goodwill and Intangible Asset_6

Goodwill and Intangible Assets (Details) - Schedule of Goodwill - USD ($) $ in Thousands	3 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2023
Schedule of Goodwill [Abstract]
Goodwill at beginning	$ 423,920	$ 433,736
Measurement Adjustments		(9,816)	(9,816)
Goodwill at ending	$ 423,920	$ 423,920	$ 423,920

Goodwill and Intangible Asset_7

Goodwill and Intangible Assets (Details) - Schedule of Intangible Assets - Developed Technology Rights [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Developed technology, gross	$ 1,345,000	$ 1,345,000	$ 604
Accumulated amortization	(54,547)	(37,735)	(341)
Developed technology, net	$ 1,290,453	$ 1,307,265	$ 263

Goodwill and Intangible Asset_8

Goodwill and Intangible Assets (Details) - Schedule of Finite-Lived Intangible Assets, Future Amortization Expense - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule Of Finite Lived Intangible Assets Future Amortization Expense Abstract
Remainder of 2024	$ 50,438
2025	67,250	$ 67,250
2026	67,250	67,250
2027	67,250	67,250
2028	67,250	67,250
2029	67,250	67,250
2030 and thereafter	903,765
Total	$ 1,290,453	$ 1,307,265

Property, Plant and Equipment_4

Property, Plant and Equipment (Details) - Schedule of Property, Plant and Equipment - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 111,420	$ 104,002	$ 128,381
Accumulated depreciation	(10,321)	(7,146)	(58,786)
Total property, plant and equipment, net	101,099	96,856	$ 69,595
Furniture and Fixtures [Member]
Schedule of Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	328	320
Building [Member]
Schedule of Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	89,239	89,239
Construction in Progress [Member]
Schedule of Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 21,853	$ 14,443

Accrued Liabilities (Details)_2

Accrued Liabilities (Details) - Schedule of Accrued Liabilities - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Accrued Liabilities [Abstract]
Accrued incentive compensation	$ 819	$ 2,016	$ 1,451
Accrued cash-based expense of BHES JDA	3,438	3,669
Accrued legal service provider fees	241	160	713
Accrued capital expenditures	1,721	3,605
Other accrued liabilities	992	1,465	228
Total accrued liabilities	$ 7,211	$ 10,915	$ 2,392

Revenue and Accounts Receivab_6

Revenue and Accounts Receivable (Details) - Schedule of Revenue Streams - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenue		$ 50	$ 175		$ 580
Feasibility Studies [Member]
Disaggregation of Revenue [Line Items]
Total revenue		50	175		125
Test Data Sales [Member]
Disaggregation of Revenue [Line Items]
Total revenue					150
Testing Services [Member]
Disaggregation of Revenue [Line Items]
Total revenue					$ 305

Revenue and Accounts Receivab_7

Revenue and Accounts Receivable (Details) - Schedule of Accounts Receivable - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Schedule Of Accounts Receivable Abstract
Accounts receivable, gross		$ 58	$ 58	$ 352
Allowance for credit losses
Accounts receivable, net		$ 58	$ 58	$ 352

Related Party Transactions (D_4

Related Party Transactions (Details) - Schedule of Related Party Transactions - Related Party [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Amounts due to related parties under master services agreements	$ 302	$ 142	$ 142	$ 178
General and administrative – related party	26	110
Research and development – related party	267	6,464
Marketing, Patent Administration, And Technology Maintenance Services [Member]
Related Party Transaction [Line Items]
General and administrative – related party	26	34
Engineering Support Provided By Former Board Member [Member]
Related Party Transaction [Line Items]
General and administrative – related party		76
General Business Oversight [Member]
Related Party Transaction [Line Items]
Research and development – related party	267	278
Baker Hughes Energy Services LLC [Member]
Related Party Transaction [Line Items]
Research and development – related party		$ 6,186

Investments (Details)

Investments (Details) $ in Thousands	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Investments (Details) [Line Items]
Types of investments	2
Certificates of Deposit [Member]
Investments (Details) [Line Items]
Short term investments	$ 100,000	$ 100,000
Interest receivable	$ 317	$ 1,886

Investments (Details) - Schedul

Investments (Details) - Schedule of Available-For-Sale Securities - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Available-For-Sale Securities [Line Items]
Amortized cost, current	$ 68,755
Unrealized gain (loss), current	435
Investments in securities, available-for-sale	69,190
Amortized cost, current	27,566
Unrealized gain (loss), current	227
Investments in securities, available-for-sale	27,793
Corporate bonds [Member]
Schedule of Available-For-Sale Securities [Line Items]
Amortized cost, current	9,900
Unrealized gain (loss), current	78
Investments in securities, available-for-sale	9,978
Amortized cost, current	2,900
Unrealized gain (loss), current	30
Investments in securities, available-for-sale	2,930
Commercial paper [Member]
Schedule of Available-For-Sale Securities [Line Items]
Amortized cost, current	23,641
Unrealized gain (loss), current	199
Investments in securities, available-for-sale	23,840
U.S. treasuries [Member]
Schedule of Available-For-Sale Securities [Line Items]
Amortized cost, current	35,214
Unrealized gain (loss), current	158
Investments in securities, available-for-sale	35,372
Amortized cost, current	24,666
Unrealized gain (loss), current	197
Investments in securities, available-for-sale	$ 24,863

Fair Value Measurements (Deta_2

Fair Value Measurements (Details) - Schedule of Fair Value of Assets and Liabilities Measured on a Recurring Basis - Fair Value, Recurring [Member] - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Assets
Total assets		$ 196,983	$ 100,000
Liabilities
Total liabilities		72,168	57,591
Fair Value, Inputs, Level 1 [Member]
Assets
Available-for-sale investments	[1]	96,983
Fair Value, Inputs, Level 2 [Member]
Assets
Short-term investments		100,000	100,000
Fair Value, Inputs, Level 3 [Member]
Liabilities
Earnout Shares		2,147	1,671
Public Warrant [Member] | Fair Value, Inputs, Level 1 [Member]
Liabilities
Warrant liability		25,004	18,969
Private Warrant [Member] | Fair Value, Inputs, Level 3 [Member]
Liabilities
Warrant liability		$ 45,017	$ 36,951
[1]$27,793 of these investments are classified as long -term

Fair Value Measurements (Deta_3

Fair Value Measurements (Details) - Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Abstract]
Balance of recurring level 3 liabilities at beginning of period	$ 38,622	$ 5,174	$ 5,174	$ 63,851	$ 1,459
Change in Earnout Shares liability and Warrant liability	8,542
Payments		(5,174)	(5,174)
Balance of recurring level 3 liabilities at end of period	$ 47,164			$ 38,622	$ 5,174

Net Loss per Share_Unit (Deta_4

Net Loss per Share/Unit (Details) - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share - shares	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	164,547,131	226,494	119,076	164,515,242	972,193
Public Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	8,622,235			8,622,235
Private Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	10,900,000
Earnout Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	328,925			328,925
Bonus Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	2,068,416
Common Stock [Member] | Common Class A, Unvested [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	848,415			848,415
Common Stock [Member] | Common Class A [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	141,274,719			141,304,030
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	504,421			443,221
Unvested Profits Interest [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		226,494	119,076		226,494
Member Loan Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share					34,588
Occidental Petroleum Share Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share					711,111

Net Loss per Share_Unit (Deta_5

Net Loss per Share/Unit (Details) - Schedule of Earnings Per Share, Basic and Diluted - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		5 Months Ended		7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Numerator
Net loss	$ (41,632)	$ (17,067)	$ (34,176)		$ (141,816)	$ (141,816)	$ (54,778)
Net loss attributable to shareholders	$ (11,422)					$ (43,056)
Denominator
Weighted-average number shares outstanding, basic (in Shares)	71,895
Net loss per share attributable to shareholders, basic (in Dollars per share)	$ (0.16)					$ (0.62)
Previously Reported [Member]
Numerator
Net loss		(17,067)		$ (34,176)			(54,778)
Net loss attributable to shareholders		$ (17,067)		$ (34,176)			$ (54,778)
Denominator
Weighted-average number shares outstanding, basic (in Shares)		3,748
Net loss per share attributable to shareholders, basic (in Dollars per share)		$ (4.55)		$ (9.07)			$ (14.79)

Net Loss per Share_Unit (Deta_6

Net Loss per Share/Unit (Details) - Schedule of Earnings Per Share, Basic and Diluted (Parentheticals) - $ / shares	3 Months Ended		5 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Net Loss per Share/Unit (Details) - Schedule of Earnings Per Share, Basic and Diluted (Parentheticals) [Line Items]
Weighted-average number shares outstanding, diluted	71,895			69,756
Net loss per share attributable to shareholders, diluted	$ (0.16)			$ (0.62)
Previously Reported [Member]
Net Loss per Share/Unit (Details) - Schedule of Earnings Per Share, Basic and Diluted (Parentheticals) [Line Items]
Weighted-average number shares outstanding, diluted		3,748	3,767		3,703
Net loss per share attributable to shareholders, diluted		$ (4.55)	$ (9.07)		$ (14.79)

Shareholders' Equity and Non-Co

Shareholders' Equity and Non-Controlling Interest (Details) - Schedule of Comprehensive Loss Attributable To Non-Redeemable And Redeemable Non-Controlling Interest - USD ($) $ in Thousands	3 Months Ended	7 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Schedule of Comprehensive Loss Attributable To Non-Redeemable And Redeemable Non-Controlling Interest [Line Items]
Net Loss before income tax	$ (45,670)	$ (147,523)
Common Class A [Member]
Schedule of Comprehensive Loss Attributable To Non-Redeemable And Redeemable Non-Controlling Interest [Line Items]
Redeemable non-controlling interest percentage – Class A OpCo Units	66.20%	67%
Net Loss before income tax attributable to Class A OpCo Units	$ (29,773)	$ (98,760)

Share-Based Payments (Details_5

Share-Based Payments (Details) - Schedule of Equity Awards Activity - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Successor [Member]
Share-Based Payments (Details) - Schedule of Equity Awards Activity [Line Items]
Quantity, unvested beginning	848,415
Calculated value, unvested ending	$ 5.21
Quantity, granted
Calculated value, granted
Quantity, forfeited
Calculated value, forfeited
Quantity, vested
Calculated value, vested
Quantity, accelerated
Calculated value, accelerated
Quantity, unvested ending	848,415
Calculated value, unvested ending	$ 5.21
Predecessor [Member]
Share-Based Payments (Details) - Schedule of Equity Awards Activity [Line Items]
Quantity, unvested beginning		226,494
Calculated value, unvested ending		$ 63.25
Quantity, granted
Calculated value, granted
Quantity, forfeited
Calculated value, forfeited
Quantity, vested
Calculated value, vested
Quantity, accelerated
Calculated value, accelerated
Quantity, unvested ending		226,494
Calculated value, unvested ending		$ 63.25

Share-Based Payments (Details_6

Share-Based Payments (Details) - Schedule of RSU’s Outstanding, Granted, Forfeited, Vested and Accelerated - Restricted Stock Units [Member]	3 Months Ended
	Mar. 31, 2024 $ / shares shares
Share-Based Payments (Details) - Schedule of RSU’s Outstanding, Granted, Forfeited, Vested and Accelerated [Line Items]
Quantity, unvested beginning | shares	443,221
Fair value, unvested beginning | $ / shares	$ 13.13
Quantity, granted | shares	71,200
Fair value, granted | $ / shares	$ 9.26
Quantity, forfeited | shares
Fair value, forfeited | $ / shares
Quantity, vested | shares
Fair value, vested | $ / shares
Quantity, accelerated | shares	(10,000)
Fair value, accelerated | $ / shares	$ 13.23
Quantity, unvested ending | shares	504,421
Fair value, unvested ending | $ / shares	$ 12.85

Share-Based Payments (Details_7

Share-Based Payments (Details) - Schedule of Fair Value of Shares Distributed as Payment for Services - Baker Hughes Energy Services LLC [Member] - USD ($)	3 Months Ended			5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024		Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	[2]
Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)	$ 168.75	[1]				$ 168.75
Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)	5.29	[1]				5.29
Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Equivalent Value per Unit or per Share (in Dollars per share)		[1]
Successor [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total Fair Value	$ 4,298				$ 8,172,000
Successor [Member] | Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)
Total Fair Value
Successor [Member] | Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)	650,248				1,236,265,000
Total Fair Value	$ 4,298				$ 8,172,000
Successor [Member] | Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)	650,248				1,236,265,000
Total Fair Value
Predecessor [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Total Fair Value			$ 1,943	$ 3,901,000
Predecessor [Member] | Membership Interests [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)			9,210	9,210,000
Total Fair Value			$ 1,943	$ 1,943,000
Predecessor [Member] | Class A OpCo Units [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)				296,160,000
Total Fair Value				$ 1,958,000
Predecessor [Member] | Class B Common Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Quantity (in Shares)				296,160,000
Total Fair Value
[1]The Equivalent Value per Unit is the discounted price per membership interest or per share stipulated in the BHES JDA[2]The Equivalent Value per Unit is the discounted price per membership interest or per share stipulated in the BHES JDA.

Share-Based Payments (Details_8

Share-Based Payments (Details) - Schedule of Disaggregates the Variable Compensation Payable to BHES - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Disaggregates The Variable Compensation Payable To Bhes Abstract
Performance Period End Date	January 2027
Compensation Cost Incurred To Date	$ 21,777
Remaining Compensation Cost	5,568,000
Total Compensation Cost	$ 27,345,000	$ 2,352	$ 9,312

Leases (Details) - Schedule o_2

Leases (Details) - Schedule of Future Minimum Lease Payments - Roney St. Lease [Member] - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Leases (Details) - Schedule of Future Minimum Lease Payments [Line Items]
2024	$ 379
2025	517	$ 504
2026	531	517
2027	544	531
2028	511	545
2029 and thereafter
Total	$ 2,482	$ 2,608

Commitments and Contingencies_6

Commitments and Contingencies (Details) - Schedule of Asset Retirement Obligations - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Asset Retirement Obligations [Abstract]
Asset retirement obligation, beginning of period	$ 2,060	$ 2,416	$ 2,416	$ 1,967
Accretion expense	43	59	102	93	215
Asset retirement obligation, end of period	$ 2,103	$ 2,475	$ 2,518	$ 2,060	$ 2,416

Commitments and Contingencies_7

Commitments and Contingencies (Details) - Schedule of Unrecognized Purchase Commitments - USD ($) $ in Thousands	3 Months Ended	5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Long-Term Purchase Commitment [Line Items]
Gross Commitment	$ 166,009		$ 166,009	$ 166,009
Unrecorded unconditional purchase obligation, recognized in current period	8,248	$ 7,410	17,095	28,927	$ 4,422
Remaining Commitment	128,834		137,082	137,082
Joint Development Agreements, Paid In Cash [Member]
Long-Term Purchase Commitment [Line Items]
Gross Commitment	70,000		70,000	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,438	3,121	6,536	11,868	2,211
Remaining Commitment	54,694		58,132	58,132
Joint Development Agreements, Paid In Share-Based Payments [Member]
Long-Term Purchase Commitment [Line Items]
Gross Commitment	70,000		70,000	70,000
Unrecorded unconditional purchase obligation, recognized in current period	3,438	3,121	6,536	11,868	2,211
Remaining Commitment	54,694		58,132	58,132
Cash [Member] | Asset Purchase Commitment [Member]
Long-Term Purchase Commitment [Line Items]
Gross Commitment	26,009		26,009	26,009
Unrecorded unconditional purchase obligation, recognized in current period	1,372	$ 1,168	4,023	5,191
Remaining Commitment	$ 19,446		$ 20,818	$ 20,818

Commitments and Contingencies_8

Commitments and Contingencies (Details) - Schedule of Costs Associated with JDA - Baker Hughes Energy Services LLC [Member] - USD ($) $ in Thousands	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 07, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Cash expense	$ 3,438	$ 1,554	$ 3,121	$ 6,536	$ 2,211
BHES JDA Bonus Share expense	610	2,688	4,690	6,620	9,857
Total research and development attributable to BHES JDA	8,346	6,185	11,713	21,328	14,833
Member Units [Member]
Schedule of Equity Method Investments [Line Items]
Membership interests issued		1,943	3,902		2,765
Class A OpCo Units issued		$ 1,943	3,902		2,765
Common Stock [Member]
Schedule of Equity Method Investments [Line Items]
Membership interests issued	4,298			8,172
Class A OpCo Units issued	$ 4,298			$ 8,172