Warrant Exercise Price Per Share.

No definition available.

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Namespace Prefix:	rklb_
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Period Type:	duration

- Definition

Warrants issued and outstanding.

+ References

No definition available.

+ Details

Name:	rklb_WarrantsIssuedAndOutstanding
Namespace Prefix:	rklb_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 30
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ 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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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Definition

Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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Balance Type:
Period Type:

- Details

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- Details

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- Details

Name:	us-gaap_BusinessAcquisitionAxis=rklb_SolaeroHoldingsIncMember
Namespace Prefix:
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Subsequent Events - Additional Information (Detail) - USD ($)	Jan. 31, 2022	Jan. 18, 2022	Dec. 31, 2021	Dec. 22, 2021	Aug. 25, 2021	Jul. 12, 2021	Dec. 31, 2020	Dec. 23, 2020	Dec. 31, 2016
Subsequent Event [Line Items]
Warrants and rights outstanding			$ 58,227,000			$ 6,514,000	$ 0
Public Warrants [Member]
Subsequent Event [Line Items]
Exercise price of warrants or rights			$ 3.58	$ 0.2843	$ 2.96
Number of securities called by each warrant or right					0
Warrants and rights outstanding					$ 48,149,000
Private Warrants [Member]
Subsequent Event [Line Items]
Warrants and rights outstanding			$ 1,592,080,000
Warrants Issued and Outstanding			5,600,000
Public and Private Warrants [Member]
Subsequent Event [Line Items]
Exercise price of warrants or rights				0.2843
Common Stock [Member]
Subsequent Event [Line Items]
Exercise price of warrants or rights				$ 11.50			$ 1.28	$ 1.28	$ 0.09
Class of warrant or right number of securities called by warrants or rights							121,689	121,689	463,710
Common Stock [Member] \| Public Warrants [Member]
Subsequent Event [Line Items]
Warrants and rights outstanding					$ 10,666,666,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of securities called by each warrant or right	2,951,781
Cash proceeds from warrants issued	$ 126,000
Warrant exercise price per share	$ 0.10
Subsequent Event [Member] \| Public Warrants [Member]
Subsequent Event [Line Items]
Class of warrant or right number of securities called by warrants or rights	10,383,077
Number of securities called by each warrant or right	10,969
Cash proceeds from warrants issued	$ 27,000
Warrants Issued and Outstanding	270,470
Subsequent Event [Member] \| Common Stock [Member]
Subsequent Event [Line Items]
Exercise price of warrants or rights	$ 11.50
Warrants and rights outstanding	$ 10,969,000
Subsequent Event [Member] \| SolAero Holdings, Inc [Member]
Subsequent Event [Line Items]
Payments to acquire businesses, Gross		$ 80,000,000
Cash consideration transferred		$ 3,600,000