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Description Of The Business - Summary of Reconciles the Elements of the Business Combination to the Condensed Consolidated Statement (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Cash $ 310,330  
Less: transaction costs and advisory fees paid (49,075)  
Net proceeds from Rocket Lab Business Combination 728,255  
Less: Accrued transaction costs (27)  
Plus: Prepaid expenses assumed as part of Business Combination 219  
Less: Warrants assumed as part of Business Combination (48,149)
Less: Repurchase of Management Shares (30,358)  
Reverse recapitalization, net of transaction costs 649,940  
Pipe Investment [Member]    
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]    
Cash $ 467,000