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Concentration of Credit Risk, Significant Customers and Geographic Information - Summary of Percentage of Customers Accounted for Accounts Receivable (Detail) - Rocket Lab USA, Inc. - Accounts Receivable [Member]	12 Months Ended
	Dec. 31, 2020
US Commercial Customer A [Member]
Concentration Risk [Line Items]
Percentage of Accounts Receivable	62.00%
US Commercial Customer B [Member]
Concentration Risk [Line Items]
Percentage of Accounts Receivable	13.00%
International Customer C [Member]
Concentration Risk [Line Items]
Percentage of Accounts Receivable	12.00%

X

- Definition

Concentration risk percentage.

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
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X

- Details

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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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X

- Details

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Namespace Prefix:
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Period Type: