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Warrants - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2021 | Dec. 23, 2020 | Dec. 31, 2016 | Dec. 31, 2015
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants term | 5 years |  |  |  |  |
Fair value of warrants | $ 2,433 |  | $ 6,514 |  |  |
Rocket Lab USA, Inc. |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants issued |  |  |  | 13,432 |  |
Warrants exercise price |  |  |  | $ 11.62 |  |
Estimated fair value of warrants | 496 | $ 769 |  |  |  |
Fair value of warrants | 2,433 |  |  |  |  |
Rocket Lab USA, Inc. | Series B Preferred Stock [Member] |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants issued |  |  |  |  |  | 33,774
Warrants exercise price |  |  |  |  |  | $ 1.80
Warrants term |  |  |  |  |  | 10 years
Fair value of warrants | $ 1,466 | $ 515 | $ 2,863 |  |  |
Rocket Lab USA, Inc. | Series C Preferred Stock [Member] |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants issued |  |  |  |  | 13,090 |
Warrants exercise price |  |  |  |  | $ 2.25 |
Warrants to purchase vested | 9,600 | 7,636 |  |  |  |
Rocket Lab USA, Inc. | Series D Preferred Stock [Member] |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants issued |  |  |  |  | 77,198 |
Warrants exercise price |  |  |  |  | $ 19.05 |
Warrants to purchase vested | 56,612 | 45,032 |  |  |  |
Rocket Lab USA, Inc. | Common Stock [Member] |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Warrants issued | 13,432 |  |  | 13,432 | 51,184 |
Warrants exercise price | $ 11.62 |  |  | $ 11.62 | $ 0.82 |
Warrants term |  |  |  | 10 years | 10 years |
Fair value of warrants |  |  |  |  | $ 23 |
Rocket Lab USA, Inc. | Additional Paid-in Capital |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Estimated fair value of warrants | $ 496 |  |  |  |  |

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- Definition Class Of Warrant Or Right Fair Value + References No definition available. + Details
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- Definition Class of Warrant or Right, Number of Securities Called by Warrants or Rights Vested. + References No definition available. + Details
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- Definition Amount of increase in additional paid in capital (APIC) resulting from the issuance of warrants. Includes allocation of proceeds of debt securities issued with detachable stock purchase warrants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123466302&loc=d3e4724-112606 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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