Cover [Abstract] Document Information [Table] Document Information [Table] Equity Components [Axis] Equity Components Equity Component [Domain] Equity Component Document Information [Line Items] Document Information [Line Items] Document Type Document Type Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Ex Transition Period Entity Ex Transition Period Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Inventory, Net Inventories Total inventories Accounts Receivable, after Allowance for Credit Loss, Current Accounts receivable, net Contract with Customer, Asset, after Allowance for Credit Loss, Current Contract assets Prepaid Expense and Other Assets, Current Prepaids and other current assets Total prepaids and other current assets Assets, Current Total current assets Assets Total assets Assets, Noncurrent [Abstract] Non-current assets: Operating Lease, Right-of-Use Asset Right-of-use assets - operating leases Property, Plant and Equipment, Net Property, plant and equipment, net Property, plant and equipment—net Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Net Carrying Amount Goodwill Goodwill Ending Balance Begning Balance Restricted Cash, Noncurrent Restricted cash Deferred Income Tax Assets, Net Deferred income tax assets, net Other Assets, Noncurrent Other non-current assets Liabilities and Equity [Abstract] Liabilities, Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) Liabilities, Current [Abstract] Current liabilities: Employee-related Liabilities, Current Employee benefits payable Accounts Payable, Current Trade payables Contract with Customer, Liability, Current Contract liabilities Liabilities, Current Total current liabilities Long-term Debt, Current Maturities Accrued Liabilities, Current Accrued expenses Other Liabilities, Current Other current liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity (deficit): Common Stock, Value, Issued Common stock, value Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Additional Paid in Capital Additional paid-in capital Retained Earnings (Accumulated Deficit) Accumulated deficit Stockholders' Equity Attributable to Parent Total stockholders' equity (deficit) Beginning balance Ending balance Liabilities, Noncurrent [Abstract] Non-current liabilities: Warrants and Rights Outstanding Warrants and rights outstanding Warrants assumed as part of Business Combination Deferred Income Tax Liabilities, Net Deferred tax liabilities Other Liabilities, Noncurrent Other non-current liabilities Operating Lease, Liability, Noncurrent Non-current lease liabilities Long-term Debt, Excluding Current Maturities Long-term borrowings, excluding current installments Liabilities Total liabilities Commitments and Contingencies COMMITMENTS AND CONTINGENCIES (Note 16) Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract] Redeemable convertible preferred stock Preferred Stock, Value, Issued Preferred stock, value Liabilities and Equity Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit) Class of Stock [Axis] Class of Stock Class of Stock [Domain] Class of Stock Series B Preferred Stock [Member] Series B Preferred Stock [Member] Series E Preferred Stock [Member] Series E preferred stock Series D Preferred Stock [Member] Series D Preferred Stock [Member] Series A Preferred Stock [Member] Series A Preferred Stock [Member] Series C Preferred Stock [Member] Series C Preferred Stock [Member] Series E1 Preferred Stock [Member] Series E 1 preferred stock Series E 1 Preferred Stock [Member] Preferred Stock, Shares Authorized Preferred shares, shares authorized Common Stock, Shares Authorized Common stock, share authorized Preferred Stock, Par or Stated Value Per Share Preferred shares, par value (in Dollars per share) Common Stock, Par or Stated Value Per Share Common stock, par value (in Dollars per share) Preferred Stock, Shares Issued Preferred shares, shares issued Preferred Stock, Shares Outstanding Preferred shares, shares outstanding Common Stock, Shares, Outstanding Common stock, share outstanding Common Stock, Shares, Issued Common stock, share issued Income Statement [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Denominator Earnings Per Share, Basic and Diluted Net loss per share attributable to common stockholders-basic and diluted Cost of Revenue Cost of revenues Gross Profit Gross loss Gross profit (loss) Revenue from Contract with Customer, Excluding Assessed Tax Revenues Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted-average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic and Diluted Weighted average common shares outstanding-basic and diluted Operating Expenses [Abstract] Operating expenses: Operating Expenses Total operating expenses Selling, General and Administrative Expense Selling, general and administrative Research and Development Expense Research and development, net Nonoperating Income (Expense) [Abstract] Other income (expense): Foreign Currency Transaction Gain (Loss), before Tax Gain (loss) on foreign exchange Fair Value Adjustment of Warrants Change in fair value of liability classified warrants Interest Income (Expense), Nonoperating, Net Interest income (expense), net Nonoperating Income (Expense) Total other income (expense), net Other Nonoperating Income (Expense) Other income (expense), net Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income, net of tax: Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive loss Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation income Net Income (Loss) Attributable to Parent Net loss Net loss Net loss attributable to common shareholders-basic and diluted Income Tax Expense (Benefit) Benefit (provision) for income taxes (Benefit) Provision for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Loss before income taxes Operating Income (Loss) Operating loss Statement of Stockholders' Equity [Abstract] Redeemable Convertible Preferred Stock [Member] Redeemable Convertible Preferred Stock [Member] Accelerated Share Repurchase Program, Adjustment Retroactive application of Exchange Ratio Shares, Outstanding Beginning balance (in Shares) Ending balance (in Shares) Shares, outstanding Stock Issued During Period Value Preferred Stock Warrants Exercised Exercise of preferred stock warrants Stock issued during period value preferred stock warrants exercised. Stock Issued During Period Share Preferred Stock Warrants Exercised Exercise of preferred stock warrants (in Shares) Stock issued during period share preferred stock warrants exercised. Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of redeemable convertible preferred stock to common stock Stock Issued During Period Shares Reverse Recapitalization Reverse recapitalization, net of transaction costs (in Shares) Stock issued during period, shares, reverse recapitalization. Stock Issued During Period, Value, Acquisitions Issuance of stock for acquisition Issuance of common stock in connection with acquisition, at fair value Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Stock Issued During Period, Shares, Acquisitions Issuance of stock for acquisition (in Shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of redeemable convertible preferred stock to common stock (in Shares) Stock Issued During Period Value Reverse Recapitalization Reverse recapitalization, net of transaction costs Stock issued during period, value, reverse recapitalization. Stock Issued During Period, Shares, Issued for Services Common stock issued upon exercise of warrants (in Shares) Temporary Equity Stock Issued During Period Share New Issues Issuance of redeemable preferred stock, share Temporary Equity Stock Issued During Period Share New Issues Stock Issued During Period Value Common Stock Warrant Issuance of common stock warrant Stock issued during period value common stock warrant. Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income Accelerated Shares Repurchase Program Adjustment Retroactive application of Exchange Ratio (in Shares) Accelerated shares repurchase program adjustment. APIC, Share-based Payment Arrangement, Option, Increase for Cost Recognition Stock-based compensation Adjustments to Additional Paid in Capital, Warrant Issued Exchange of preferred stock warrants for common stock warrants Temporary Equity, Stock Issued During Period, Value, New Issues Issuance of redeemable preferred stock, value Conversion of public warrants for common stock Conversion of public warrants for common stock Conversion of public warrants for common stock Conversion of public warrants for common stock, shares Conversion of public warrants for common stock, shares Conversion of public warrants for common stock, shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options (in Shares) Options to Purchase Common Stock, Exercised Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption Cumulative Effect, Period of Adoption, Adjustment [Member] Adjustment [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Common Stock [Member] Common Stock [Member] Preferred Stock [Member] Preferred Stock [Member] Legacy Rocket Lab preferred stock [Member] Retained Earnings [Member] Accumulated Deficit [Member] AOCI Attributable to Parent [Member] Other Comprehensive Income (Loss) [Member] Operating Cash Flows, Direct Method [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Contract with Customer, Asset Contract assets Increase (Decrease) in Inventories Inventories Increase (Decrease) in Accrued Liabilities Accrued expenses Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Prepaid Expense and Other Assets Prepaids and other current assets Increase (Decrease) in Other Noncurrent Assets Other non-current assets Increase (Decrease) in Accounts Payable, Trade Trade payables Increase (Decrease) in Employee Related Liabilities Employee benefits payables Increase (Decrease) in Contract with Customer, Liability Contract liabilities Increase (Decrease) in Other Current Liabilities Other current liabilities Increase Decrease In Non Current Lease Liabilities Non-current lease liabilities Increase Decrease in Non Current Lease Liabilities Increase (Decrease) in Other Noncurrent Liabilities Other non-current liabilities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Share-based Payment Arrangement, Noncash Expense Stock compensation expense Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Amortization Of Inventory Step-Up Amortization of inventory step-up Amortization Of Inventory Step-Up Other Noncash Expense Noncash lease expense Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Loss on disposal of assets Gain (Loss) on Extinguishment of Debt Loss on debt extinguishment Adjustment of Warrants Granted for Services Noncash expense associated with liability-classified warrants Deferred Income Taxes and Tax Credits Deferred income taxes Amortization of Debt Issuance Costs Amortization of debt issuance costs and discount Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net loss Net Cash Provided by (Used in) Operating Activities Net cash used in operating activities Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Proceeds from Long-term Lines of Credit Proceeds from long-term revolving line of credit Proceeds from Issuance of Secured Debt Proceeds from long-term secured term loan Proceeds from Stock Options Exercised Proceeds from the exercise of stock options and public warrants Repayments of Long-term Lines of Credit Repayments on long-term revolving line of credit Repurchase Of Shares And Options From Management Repurchase of shares and options from management Repurchase of shares and options from management. Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Proceeds from Issuance of Preferred Stock and Preference Stock Net Proceeds from issuance of Series E-1 Preferred Stock Proceeds From Business Combination And Pipe Investment Net Of Transaction Costs Proceeds from Business Combination and PIPE Investment, net of transaction costs Proceeds from business combination and PIPE investment, net of transaction costs. Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid for interest Income Taxes Paid, Net Cash refunds/(paid) for income taxes Issuance Of Common Stock Warrants And Accrued Issuance Costs Connection With Loan And Security Agreement Issuance of common stock warrants and accrued issuance costs in connection with loan and security agreement Issuance of common stock warrants and accrued issuance costs connection with loan and security agreement. Unpaid Purchases Of Property Equipment And Software Unpaid purchases of property, equipment and software Unpaid Purchases of Property Equipment and Software Unpaid Transaction Costs Unpaid transaction costs Unpaid transaction costs. Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Right-of-use assets obtained in exchange for new operating lease liabilities Warrants And Right Outstanding Warrants assumed as part of Business Combination Less: Warrants assumed as part of Business Combination Warrants And Right Outstanding Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Prepaid expenses assumed as part of Business Combination Contingent Consideration Assumed At Acquisitions Contingent consideration assumed at acquisitions Contingent Consideration Assumed At Acquisitions Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES: Payments to Acquire Property, Plant, and Equipment Purchases of property, equipment and software Payments to Acquire Businesses, Net of Cash Acquired Cash paid for acquisitions, net of acquired cash Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Net increase (decrease) in cash and cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents, and restricted cash, beginning of period Cash and cash equivalents, and restricted cash, end of period Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Accounting Standards Update and Change in Accounting Principle [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] DESCRIPTION OF THE BUSINESS Accounting Policies [Abstract] Significant Accounting Policies [Text Block] SIGNIFICANT ACCOUNTING POLICIES Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Text Block] REVENUES Business Combinations [Abstract] Business Combination Disclosure [Text Block] BUSINESS COMBINATIONS Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] FAIR VALUE OF FINANCIAL INSTRUMENTS