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v3.22.1

Description Of The Business - Additional Information (Detail) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Feb. 21, 2022 $ / shares | Aug. 25, 2021 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2019 shares
Description Of The Business [Line Items] |  |  |  |  |
Stock repurchased during period, value | $ |  |  | $ 30,358 |  |
Preferred stock, convertible, conversion ratio | $ / shares |  |  | $ 9.059659 |  |
Exercise of stock options (in Shares) |  |  | 3,708,786 | 2,771,051 |
Fair value per share of common stock | $ / shares |  |  | $ 0 | $ 1.41 |
Exercise of stock options | $ |  |  | $ 3,122 | $ 978 |
Shares, outstanding |  |  | 447,919,591 |  |
Common stock, share issued |  |  | 450,180,479 | 78,410,162 |
Common stock, par value (in Dollars per share) | $ / shares |  |  | $ 0.0001 | $ 0.0001 |
Stockholders Equity Note, Stock Split,Exchange Ratio |  |  | 9.059659 |  |
Vector Warrants [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Number of securities called by each warrant or right |  |  | 16,266,666 |  |
Exercise price of warrants or rights | $ / shares |  |  | $ 11.50 |  |
Legacy Rocket Lab warrants [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Number of securities called by each warrant or right |  |  | 891,380 |  |
Exercise price of warrants or rights | $ / shares |  |  | $ 0.29 |  |
Share Price Equal or Exceeds Twenty Rupees per dollar [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Fair value per share of common stock | $ / shares | $ 20.00 |  | $ 20.00 |  |
Issuance of stock for acquisition (in Shares) |  |  | 32,150,757 |  |
Share Price Equal or Exceeds Twenty Rupees per dollar [Member] | Minimum |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Number of consecutive trading days for determining share price | 20 days |  | 20 days |  |
Share Price Equal or Exceeds Twenty Rupees per dollar [Member] | Maximum |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Number of consecutive trading days for determining share price | 30 days |  |  |  |
Number of trading days for determining share price |  |  | 30 days |  |
Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Shares, outstanding |  |  | 0 | 283,843,764 | 30,680,373
Common Class A [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Fair value per share of common stock | $ / shares |  |  | $ 18.00 |  |
Shares issued |  |  | 31,031,383 |  |
Stock redeemed or called during period, shares |  |  | 968,617 |  |
Common Class B [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Shares issued |  |  | 8,000,000 |  |
Post Combination Company [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Fair value per share of common stock | $ / shares |  | $ 10.00 |  |  |
Stock issued during period, shares, new issues |  | 46,700,000 |  |  |
Common stock, share issued |  |  | 46,700,000 |  |
Post Combination Company [Member] | Common Class A [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Exercise of stock options (in Shares) |  | 968,617 |  |  |
Fair value per share of common stock | $ / shares |  | $ 10.00 |  |  |
Exercise of stock options | $ |  | $ 9,686 |  |  |
Conversion of stock, shares converted |  | 31,031,383 |  |  |
Post Combination Company [Member] | Common Class B [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Conversion of stock, shares converted |  | 8,000,000 |  |  |
Post Combination Company Common Stock [Member] | Legacy Rocket Lab Options [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Share-based compensation arrangement by share-based payment award |  |  | 17,961,684 |  |
Share-based compensation arrangement by share-based payment award, per share weighted average price of shares purchased | $ / shares |  |  | $ 1.04 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares |  |  | 14,253,283 |  |
Post Combination Company Common Stock [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period |  |  | 14,903,640 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee |  |  | 4,065,304 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period |  |  | 1,915,356 |  |
Pipe Investment [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Exercise of stock options | $ |  | $ 467,000 |  |  |
Legacy Rocket Lab Common Stock [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Shares issued |  |  | 362,188,208 |  |
Legacy Rocket Lab Common Stock [Member] | Post Combination Company [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Stock repurchased during period, value | $ |  | $ 40,000 |  |  |
Share-based compensation arrangement by share-based payment award |  | 10,000,000 |  |  |
Share-based payment arrangement, plan modification, incremental cost | $ |  | $ 9,642 |  |  |
Legacy Rocket Lab Common Stock [Member] | Post Combination Company [Member] | Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Description Of The Business [Line Items] |  |  |  |  |
Shares Issued |  | 362,188,208 |  |  |
Preferred stock, convertible, conversion ratio | $ / shares |  | $ 9.059659 |  |  |

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