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Prepaid and Other Current Assets - Schedule of Prepaid and Other Current Assets (Detail) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Prepaid expenses | $ 284,625 | $ 366,647 |
Rocket Lab USA, Inc. |  |  |
Prepaid expenses | 2,370,000 | 2,628,000 | $ 833,000
Government grant receivables | 0 | 5,870,000 | 3,475,000
Other current assets | 2,555,000 | 914,000 | 2,038,000
Total prepaids and other current assets | $ 4,925,000 | $ 9,412,000 | $ 6,346,000

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