Class of warrant or right redemption threshold consecutive trading days | trading days.

No definition available.

Name:	gnpk_ClassOfWarrantOrRightRedemptionThresholdConsecutiveTradingDays
Namespace Prefix:	gnpk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrant or right, threshold period for exercise from date of closing public offering.

+ References

No definition available.

+ Details

Name:	gnpk_ClassOfWarrantOrRightThresholdPeriodForExerciseFromDateOfClosingPublicOffering
Namespace Prefix:	gnpk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrants redemption notice period.

+ References

No definition available.

+ Details

Name:	gnpk_ClassOfWarrantsRedemptionNoticePeriod
Namespace Prefix:	gnpk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Class of warrants redemption price per unit.

+ References

No definition available.

+ Details

Name:	gnpk_ClassOfWarrantsRedemptionPricePerUnit
Namespace Prefix:	gnpk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Initial public offer.

+ References

No definition available.

+ Details

Name:	gnpk_InitialPublicOfferLineItems
Namespace Prefix:	gnpk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Share redemption trigger price per share.

+ References

No definition available.

+ Details

Name:	gnpk_ShareRedemptionTriggerPricePerShare
Namespace Prefix:	gnpk_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Warrant instrument redemption threshold consecutive trading days.

+ References

No definition available.

+ Details

Name:	gnpk_WarrantInstrumentRedemptionThresholdConsecutiveTradingDays
Namespace Prefix:	gnpk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Warrant instrument redemption threshold trading days.

+ References

No definition available.

+ Details

Name:	gnpk_WarrantInstrumentRedemptionThresholdTradingDays
Namespace Prefix:	gnpk_
Data Type:	xbrli:durationItemType
Balance Type:	na
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=109259400&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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=109259400&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

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- 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=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_WarrantsAndRightsOutstandingTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=gnpk_PublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	gnpk_TriggeringEventAxis=gnpk_ShareTriggerPriceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Initial Public Offering - Additional Information (Detail) - $ / shares			5 Months Ended
	Nov. 27, 2020	Nov. 23, 2020	Dec. 31, 2020
Initial Public Offer [Line Items]
Stock issued during the period shares new issues	16,377,622
Public Warrants [Member]
Initial Public Offer [Line Items]
Class of warrant or right redemption threshold consecutive trading days \| trading days			30 days
Class of warrant or right, threshold period for exercise from date of closing public offering			12 months
Term of warrants			5 years
Public Warrants [Member] \| Share Trigger Price [Member]
Initial Public Offer [Line Items]
Class Of Warrants Redemption Price Per Unit			0.01%
Class Of Warrants Redemption Notice Period			30 days
IPO [Member]
Initial Public Offer [Line Items]
Stock issued during the period shares new issues	16,377,622	2,250,000
Over-Allotment Option [Member]
Initial Public Offer [Line Items]
Stock issued during the period shares new issues	1,377,622
Common Class A [Member] \| Share Trigger Price [Member]
Initial Public Offer [Line Items]
Share Redemption Trigger Price Per Share	$ 18.00
Warrant instrument redemption threshold consecutive trading days	20 days
Warrant instrument redemption threshold trading days	30 days
Common Class A [Member] \| IPO [Member]
Initial Public Offer [Line Items]
Stock issued during the period shares new issues	16,377,622
Sale of stock issue price per share	$ 10.00
Class of warrants or rights exercise price	$ 11.50
Common Class A [Member] \| Over-Allotment Option [Member]
Initial Public Offer [Line Items]
Stock issued during the period shares new issues	1,377,622