Goodwill and Intangible Assets, Net - Summary of Amortization Expense (Details) - Rocket Lab USA, Inc. - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 1,292	$ 666
Cost of Sales [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	236	141
Research and Development Expense [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	743	12
Selling, General and Administrative Expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 313	$ 513

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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