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Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Share Price Range [Axis] Share Price Range [Axis] Share Price Range Accounts payable Increase (Decrease) in Accounts Payable Type of Restructuring [Domain] Type of Restructuring [Domain] Interest income, net Interest Income (Expense), Nonoperating Accrued project expenses Accrued Project Expenses Accrued Project Expenses Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Loss per share of Class A Common Stock, basic (in dollars per share) Loss per share attributable to shareholders, basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] OpCo OpCo [Member] OpCo Commercial paper Commercial Paper [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Measurement Input Type [Domain] Measurement Input Type [Domain] Adjustment to Compensation, Amount Adjustment to Compensation Amount Consolidation Consolidation, Policy [Policy Text Block] Non-controlling interest holders Redeemable Noncontrolling Interest, Percentage Of Common Units Redeemable Noncontrolling Interest, Percentage Of Common Units Share-based compensation expense Share-Based Payment Arrangement, Noncash Expense Stock Options Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Unrecorded unconditional purchase obligation, threshold trading days Unrecorded Unconditional Purchase Obligation, Threshold Trading Days Unrecorded Unconditional Purchase Obligation, Threshold Trading Days Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] BHES JDA Suspension Agreement BHES JDA Suspension Agreement [Member] BHES JDA Suspension Agreement Antidilutive Securities [Axis] Antidilutive Securities [Axis] Impairment and other charges Asset Impairment Charges Debt Securities, Available-for-Sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive income Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Share-based compensation expense Share-Based Payment Arrangement, Expense Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Goodwill and Intangible Assets Disclosure [Abstract] Issuance of Class A Common Stock (in shares) Stock Issued During Period, Shares, New Issues Current assets Assets, Current [Abstract] Total liabilities, mezzanine shareholders' equity, and shareholders' equity Liabilities and Equity Due to related parties Increase (Decrease) in Other Current Liabilities Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] BHES Bonus Shares Bonus Shares [Member] Bonus Shares Quantity Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] LIABILITIES, MEZZANINE SHAREHOLDERS' EQUITY, AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Cover [Abstract] Unrealized gain, noncurrent Debt Securities, Available-for-Sale, Unrealized Gain, Noncurrent Debt Securities, Available-for-Sale, Unrealized Gain, Noncurrent Net loss attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Accounting Policies [Abstract] Net Amount Finite-Lived Intangible Assets, Net Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Stock issued during period, shares, issued for services (in shares) Stock Issued During Period, Shares, Issued for Services Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation, amortization, and accretion Depreciation, Depletion and Amortization, Nonproduction Entity Shell Company Entity Shell Company Redemption of Common Stock (in shares) Stock Redeemed or Called During Period, Shares Goodwill, impairment loss Goodwill, Impairment Loss Statement of Stockholders' Equity [Abstract] Share-Based Payment Arrangement, Performance Shares, Activity Share-Based Payment Arrangement, Performance Shares, Activity [Table Text Block] Share Price Equals Or Exceeds Eighteen U.S. Dollars Share Price Equals Or Exceeds Eighteen U.S. Dollars [Member] Share Price Equals Or Exceeds Eighteen U.S. Dollars Interest receivable Increase (Decrease) in Interest and Dividends Receivable Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Comprehensive loss attributable to NET Power Inc. 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Cash flows from investing activities: Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] 2027 Finite-Lived Intangible Asset, Expected Amortization, Year One Trading Symbol Trading Symbol Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Address, City or Town Entity Address, City or Town Asset Purchase Commitment Asset Purchase Commitment [Member] Asset Purchase Commitment Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Unvested RSUs Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Severance costs Severance Costs Property, plant and equipment, construction expense Property, Plant, and Equipment, Construction Expense Property, Plant, and Equipment, Construction Expense Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Four Entity Emerging Growth Company Entity Emerging Growth Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Warrants, each exercisable for one share of Class A Common Stock at a price of $11.50 Warrant [Member] Changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Debt Securities, Available-for-Sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Related Party Related Party [Member] Common stock, outstanding (in shares) Common stock, beginning balance (in shares) Common stock, ending balance (in shares) Common Stock, Shares, Outstanding Plan Name [Axis] Plan Name [Axis] Document Information [Table] Document Information [Table] PEO PEO [Member] Class of warrant or right, redemption price per warrant (in dollars per share) Class Of Warrant Or Right, Redemption Price Per Warrant Class Of Warrant Or Right, Redemption Price Per Warrant Supplemental non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Share Price Is Below Eighteen U.S. Dollars Share Price Is Below Eighteen U.S. Dollars [Member] Share Price Is Below Eighteen U.S. Dollars Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Accumulated Deficit Retained Earnings [Member] Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Cash, cash equivalents, and restricted cash, beginning of period Cash, cash equivalents, and restricted cash, end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income tax expense Deferred income tax expense (benefit) Income Tax Expense (Benefit) Class B Common Stock Common Class B [Member] Document Information [Line Items] Document Information [Line Items] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Amortized cost, current Debt Securities, Available-for-Sale, Amortized Cost, Current Franchise tax Franchise Tax Payable Franchise Tax Payable Carrying amount Property, Plant and Equipment, Gross Total Shareholders' Equity Parent [Member] Net loss after income tax Net loss Net loss before income tax Net loss after income tax Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total liabilities Liabilities, Fair Value Disclosure Organization, Consolidation and Presentation of Financial Statements [Abstract] One-time Employee Termination Costs Restructuring and Related Activities Disclosure [Text Block] Other income Other Income and Expenses [Abstract] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued liabilities Accrued Liabilities, Current Unvested, beginning of period (in shares) Unvested, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] General and administrative General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Related Party Transactions [Abstract] Quantity Shares Granted or Issued, Share-Based Payment Arrangement [Abstract] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Subsequent Event Subsequent Event [Member] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Depreciation and amortization expense Depreciation Remaining 2026 Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Numerator Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Equity Components [Axis] Equity Components [Axis] Entity Ex Transition Period Entity Ex Transition Period Effective income tax rate reconciliation, estimated annual percent Effective Income Tax Rate Reconciliation, Estimated Annual Percent Effective Income Tax Rate Reconciliation, Estimated Annual Percent Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Adjustment of redeemable non-controlling interest to book value Noncontrolling Interest, Change in Redemption Value Stock issued during period, value, issued for services Stock Issued During Period, Value, Issued for Services Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Other Performance Measure, Amount Other Performance Measure, Amount Weighted-Average Grant Date Fair Value Per Share Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Entity Address, State or Province Entity Address, State or Province Payments on finance lease obligations Finance Lease, Principal Payments Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Security, Excluded EPS Calculation [Table] Related Party, Type [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Net decrease in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), 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Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Capitalized software Payments for Software Software Computer Software, Intangible Asset [Member] Cash flows from operating activities: Cash Provided by (Used in) Operating Activity, Continuing Operation [Abstract] Plan Name [Domain] Plan Name [Domain] Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Measurement Input, Offered Price Measurement Input, Offered Price [Member] Shareholders' equity Equity [Abstract] La Porte Demonstration Facility Building [Member] Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Class of warrants or right, convertible, threshold trading days Class Of Warrants Or Right, Convertible, Threshold Trading Days Class Of Warrants Or Right, Convertible, Threshold Trading Days Schedule of Other Ownership Interests Schedule of Other Ownership Interests [Table Text Block] U.S. treasuries US Treasury Securities [Member] Capital expenditures Accrued Capital Expenditures Accrued Capital Expenditures Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Other Commitments [Line Items] Other Commitments [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Joint Development Agreements, Paid In Share-Based Payments Joint Development Agreements, Paid In Share-Based Payments [Member] Joint Development Agreements, Paid In Share-Based Payments Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Ownership [Domain] Ownership [Domain] Assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract] Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Amortization expense Amortization of Intangible Assets Redemption of Common Stock Stock Redeemed or Called During Period, Value Volatility Measurement Input, Price Volatility [Member] Make-Whole Awards Make-Whole Awards [Member] Make-Whole Awards Share Price Equals Or Exceeds Ten U.S. Dollars Share Price Equals Or Exceeds Ten U.S. Dollars [Member] Share Price Equals Or Exceeds Ten U.S. Dollars Depreciation, amortization, and accretion Depreciation, Depletion and Amortization Other long-term assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Asset retirement obligation, beginning of period Asset retirement obligation, end of period Asset Retirement Obligation Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] 2031 and thereafter Finite-Lived Intangible Asset, Expected Amortization, Year Five And Thereafter Finite-Lived Intangible Asset, Expected Amortization, Year Five And Thereafter Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Balance of recurring Level 3 liabilities at beginning of period Balance of recurring Level 3 liabilities at end of period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Earnout Shares Business Combination, Contingent Consideration, Liability, Noncurrent Arrangement Duration Trading Arrangement Duration Master services agreement administrative costs Administrative Costs [Member] Administrative Costs Liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, (Sales), Issuances, (Settlements) [Abstract] Change in accruals for capital expenditures Increase (Decrease) In Capital Expenditures Incurred but Not yet Paid Increase (Decrease) In Capital Expenditures Incurred but Not yet Paid Class of warrant or right, exercise price of warrants or rights (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Exercise Price Award Exercise Price Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Share price (in dollars per share) Share Price Subsequent Event Type [Axis] Subsequent Event Type [Axis] Share-Based Compensation Share-Based Payment Arrangement [Text Block] Restructuring and related cost, expected cost Restructuring and Related Cost, Expected Cost ASSETS Assets [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent 2029 Finite-Lived Intangible Asset, Expected Amortization, Year Three Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Gross Amount Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Research and development Research and Development Expense Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Non-current operating lease liabilities Operating Lease, Liability, Noncurrent Redeemable non-controlling interests in subsidiary Redeemable Noncontrolling Interest, Equity, Carrying Amount Ownership [Axis] Ownership [Axis] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Share Price Range [Domain] Share Price Range [Domain] Share Price Range [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Change in Earnout Shares liability and Warrant liability Gain (Loss) On Change In Earnout Shares Liability Gain (Loss) On Change In Earnout Shares Liability Other long-term assets Increase (Decrease) in Other Noncurrent Assets Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Remaining compensation cost Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Change in Earnout Shares liability Earnout Shares Earnout Shares [Member] Earnout Shares Total assets Assets, Fair Value Disclosure Fair Value Measurement Inputs and Valuation Techniques Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Interest receivable Interest Receivable, Current Joint Development Agreements Joint Development Agreements [Member] Joint Development Agreements Counterparty Name [Domain] Counterparty Name [Domain] Assets acquired under finance lease Finance Lease, Right-of-Use Asset, before Accumulated Amortization Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Related Party, Type [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Fair Value, Liabilities Measured on Recurring Basis Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Gain (loss) on stock issued during period, value, issued for services, inception-to-date Gain (Loss) On Stock Issued During Period, Value, Issued For Services, Inception-To-Date Gain (Loss) On Stock Issued During Period, Value, Issued For Services, Inception-To-Date Name Trading Arrangement, Individual Name Joint Development Agreements, Paid In Cash Joint Development Agreements, Paid In Cash [Member] Joint Development Agreements, Paid In Cash All Award Types Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Shares reserved for future issuance, percentage Common Stock, Shares Reserved For Future Issuance, Percentage Common Stock, Shares Reserved For Future Issuance, Percentage Warrants and rights outstanding, measurement input (in dollars per share) Warrants and rights outstanding, measurement input Warrants and Rights Outstanding, Measurement Input Compensation Amount Outstanding Recovery Compensation Amount Omnibus Incentive Plan Omnibus Incentive Plan [Member] Omnibus Incentive Plan Shares reserved for future issuance, annual increase, percentage (in shares) Common Stock, Shares Reserved For Future Issuance, Annual Increase, Percentage Common Stock, Shares Reserved For Future Issuance, Annual Increase, Percentage Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Valuation, Black-Scholes Merton Model Valuation, Black-Scholes Merton Model [Member] Valuation, Black-Scholes Merton Model MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Other accrued liabilities Other Accrued Liabilities Unvested, beginning of period (in dollars per share) Unvested, end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Restricted cash Restricted Cash, Noncurrent Restructuring Type [Axis] Restructuring Type [Axis] Denominator Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Comprehensive loss attributable to non-controlling interests Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest Non-controlling interest holders Non Controlling Interest Holders [Member] Non Controlling Interest Holders Change in fair value of Earnout Shares liability and Warrant liability Fair Value Adjustment, Contingent Consideration And Warrant Liabilities Fair Value Adjustment, Contingent Consideration And Warrant Liabilities Share-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Sales and marketing Selling and Marketing Expense Financial Instruments [Domain] Financial Instruments [Domain] Unrealized gain (loss) on investments OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment and Tax Liability Class [Axis] Liability Class [Axis] Remeasurement adjustment to redeemable non-controlling interest resulting from ownership changes Adjustments to Additional Paid In Capital, Remeasurement Adjustment To Redeemable Non Controlling Interest Adjustments to Additional Paid In Capital, Remeasurement Adjustment To Redeemable Non Controlling Interest Unvested PSUs Performance Shares [Member] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Developed technology Developed Technology Rights [Member] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Class of warrant or right, number of securities called by warrants or rights (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Long-term assets Assets, Noncurrent [Abstract] Unrecorded unconditional purchase obligation, weighted average share price (in dollars per share) Unrecorded Unconditional Purchase Obligation, Weighted Average Share Price Unrecorded Unconditional Purchase Obligation, Weighted Average Share Price Loss per Share Earnings Per Share, Policy [Policy Text Block] Accretion expense Asset Retirement Obligation, Accretion Expense Company Selected Measure Name Company Selected Measure Name Purchases of available-for-sale securities Payments to Acquire Debt Securities, Available-for-Sale Finite-Lived Intangible Assets Amortization Expense Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Preferred Stock, $.0001 par value; 1,000 shares authorized; no shares issued or outstanding as of March 31, 2026 and December 31, 2025 Preferred Stock, Value, Issued Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Unrealized loss, current Debt Securities, Available-for-Sale, Unrealized Loss, Current Debt Securities, Available-for-Sale, Unrealized Loss, Current All Executive Categories All Executive Categories [Member] Common stock, value, issued Common Stock, Value, Issued NET Power Inc. NET Power, Inc. [Member] NET Power, Inc. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Weighted average shares of Class A Common Stock, diluted (in shares) Weighted-average number shares outstanding, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Segment Reporting Segment Reporting, Policy [Policy Text Block] Commitments and contingencies (Note 14) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Expense Recognized Share-Based Payment Arrangement, Recognized Amount [Abstract] Business Combination [Axis] Business Combination [Axis] Comprehensive loss Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Non-controlling Interests - Mezzanine Equity Noncontrolling Interest [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Gain (loss) on stock issued during period, value, issued for services Gain (Loss) On Stock Issued During Period, Value, Issued For Services Gain (Loss) On Stock Issued During Period, Value, Issued For Services Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Class A Common Stock Vested Class A OpCo Units Common Class A [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Net loss before income tax Income (Loss), Including Portion Attributable to Noncontrolling Interest, before Tax Total shareholders' equity Equity, beginning balance Equity, ending balance Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Loss per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Issuance of Class A Common Stock under share-based compensation plans Proceeds from Issuance of Common Stock All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Total current assets Assets, Current Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheet: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Increase in Tax Receivable Agreement liability from qualifying exchanges, net of deferred taxes Adjustments To Additional Paid In Capital, Tax Receivable Agreement Adjustments To Additional Paid In Capital, Tax Receivable Agreement Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Payment of tax withholdings on vested share-based payment awards Payment, Tax Withholding, Share-Based Payment Arrangement Share-based payment arrangement, accelerated cost Share-Based Payment Arrangement, Accelerated Cost Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Master services agreement costs for the La Porte Demonstration Facility Costs for Demonstration Facility [Member] Costs for Demonstration Facility Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Current liabilities Liabilities, Current [Abstract] Total operating expenses Operating Expenses Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Level 1 Fair Value, Inputs, Level 1 [Member] Warrant liability Warrant Liability, Noncurrent Warrant Liability, Noncurrent Accrued liabilities Increase (Decrease) in Accrued Liabilities Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Loss per share of Class A Common Stock, diluted (in dollars per share) Loss per share attributable to shareholders, diluted (in dollars per share) Earnings Per Share, Diluted Clean gas product, maximum power (in gigawatts) Clean Gas Product, Maximum Power Clean Gas Product, Maximum Power Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Title of 12(b) Security Title of 12(b) Security Unrecorded unconditional purchase obligation, percentage Unrecorded Unconditional Purchase Obligation, Percentage Unrecorded Unconditional Purchase Obligation, Percentage Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Earnings Per Share [Abstract] Net other income Nonoperating Income (Expense) NET Power Inc. Subsidiary, Ownership Percentage, Parent Investments, Debt and Equity Securities [Abstract] Change in Private Placement Warrant liability Private Placement Warrant [Member] Private Placement Warrant Measurement Input, Strike Price Measurement Input, Strike Price [Member] Measurement Input, Strike Price Schedule of Antidilutive Securities Excluded from Computation of Earnings (Loss) per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Investments in securities, available-for-sale Investments in securities, available-for-sale, current Debt Securities, Available-for-Sale, Current Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Unvested Class A OpCo Units Common Class A, Unvested [Member] Common Class A, Unvested 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Two Amortized cost, noncurrent Debt Securities, Available-for-Sale, Amortized Cost, Noncurrent Award Timing Disclosures [Line Items] Total accrued liabilities Accrued Liabilities Schedule of Change in Asset Retirement Obligation Schedule of Change in Asset Retirement Obligation [Table Text Block] Tax receivable agreement, liability Tax Receivable Agreement, Liability Tax Receivable Agreement, Liability Property, Plant, and Equipment Property, Plant and Equipment Disclosure [Text Block] Total property, plant, and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Net loss attributable to NET Power Inc. Net loss attributable to NET Power Inc. Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Construction-in-progress Construction in Progress [Member] Related party transaction, amounts of transaction Related Party Transaction, Amounts of Transaction Property, plant, and equipment, net Property, Plant and Equipment, Net Restructuring charges Restructuring Charges Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] One-time Termination Benefits One-time Termination Benefits [Member] Restructuring Cost [Table] Restructuring Cost [Table] Entity Current Reporting Status Entity Current Reporting Status Term (in years) Measurement Input, Expected Term [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Cash flows from financing activities: Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] Operating loss Operating Income (Loss) Loss on contract termination Loss on Contract Termination Accumulated deficit Retained Earnings (Accumulated Deficit) Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Asset retirement obligation Asset Retirement Obligations, Noncurrent Finance lease liabilities, current portion Finance Lease, Liability, Current Current Fiscal Year End Date Current Fiscal Year End Date Class of Stock [Axis] Class of Stock [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] BHES Baker Hughes Energy Services LLC [Member] Baker Hughes Energy Services LLC Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payables and Accruals [Abstract] Other income Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Deferred income tax expense Deferred Income Tax Expense (Benefit) Adjustments to reconcile net loss to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Risk-free rate Measurement Input, Risk Free Interest Rate [Member] Redeemable Non-Controlling Interests in Subsidiary Noncontrolling Interest Disclosure [Text Block] Nature of Business and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Antidilutive securities excluded from computation of earnings (loss) per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Unrecorded unconditional purchase obligation Unrecorded Unconditional Purchase Obligation Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Private Placement Warrants Private Warrant [Member] Private Warrant Other Commitments [Table] Other Commitments [Table] Termination Date Trading Arrangement Termination Date Net cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Related party transaction, suspension agreement, extension period Related Party Transaction, Suspension Agreement, Extension Period Related Party Transaction, Suspension Agreement, Extension Period Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Investments in securities, available-for-sale Investments in securities, available-for-sale, noncurrent Debt Securities, Available-for-Sale, Noncurrent Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Weighted average shares of Class A Common Stock, basic (in shares) Weighted-average number shares outstanding, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of Loss per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Non-cash income Non-Cash Interest Income (Expense) Non-Cash Interest Income (Expense) Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Schedule of Unvested Restricted Stock Units Roll Forward Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] Entity Tax Identification Number Entity Tax Identification Number Change in Tax Receivable Agreement liability Change in Tax Receivable Agreement liability Gain (Loss) On Change In Tax Receivable Agreement Liability Gain (Loss) On Change In Tax Receivable Agreement Liability Professional fees Accrued Professional Fees Restructuring and Related Activities [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares, issued (in shares) Common Stock, Shares, Issued Goodwill and Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Change in earnout shares liability and private placement warrant liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Public Warrants Public Warrant [Member] Public Warrant Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Maturities of available-for-sale securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Operating expenses Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Due to related parties Other Liabilities, Current Unrealized gain, current Debt Securities, Available-for-Sale, Unrealized Gain, Current Debt Securities, Available-for-Sale, Unrealized Gain, Current Issuance of Class A Common Stock Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Counterparty Name [Axis] Counterparty Name [Axis] Deferred taxes Increase (Decrease) in Deferred Income Taxes Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Available-for-sale investments Debt Securities, Available-for-Sale Incentive compensation Employee-related Liabilities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Unrealized loss, noncurrent Debt Securities, Available-for-Sale, Unrealized Loss, Noncurrent Debt Securities, Available-for-Sale, Unrealized Loss, Noncurrent Corporate bonds Corporate Debt Securities [Member]