Document and Entity Information
Jan. 20, 2022
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0001819994
Document Type 8-K
Document Period End Date Jan. 20, 2022
Entity Registrant Name Rocket Lab USA, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-39560
Entity Tax Identification Number 98-1550340
Entity Address, Address Line One 3881 McGowen Street
Entity Address, City or Town Long Beach
Entity Address, State or Province CA
Entity Address, Postal Zip Code 90808
City Area Code (714)
Local Phone Number 465-5737
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company true
Entity Ex Transition Period false
Common Stock 0.0001 Par Value Per Share 2 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, $0.0001 par value per share
Trading Symbol RKLB
Security Exchange Name NASDAQ
Redeemable Warrants Each Whole Warrant Exercisable For One Share Of Common Stock 0.0001 Par Value 1 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Redeemable warrants, each whole warrant exercisable for one share of common stock, $0.0001 par value
Trading Symbol RKLBW
Security Exchange Name NASDAQ