Class of warrants or rights issue price per share.

No definition available.

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

- Definition

Class of warrants or rights issued during the period shares.

+ References

No definition available.

+ Details

Name:	gnpk_ClassOfWarrantsOrRightsIssuedDuringThePeriodShares
Namespace Prefix:	gnpk_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Disclosure of private placement.

+ References

No definition available.

+ Details

Name:	gnpk_DisclosureOfPrivatePlacementLineItems
Namespace Prefix:	gnpk_
Data Type:	xbrli:stringItemType
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

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

+ Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

Private Placement - Additional Information (Detail) - USD ($)	Nov. 27, 2020	Jun. 30, 2021	Dec. 31, 2020
Private Placement Warrants [Member] \| Private Warrants [Member]
Disclosure Of Private Placement [Line Items]
Private Warrants outstanding		7,732,168	7,732,168
Private Placement [Member] \| Private Placement Warrants [Member]
Disclosure Of Private Placement [Line Items]
Class of warrants or rights exercise price	$ 11.50
Private Placement [Member] \| Sponsor Private Placement Warrants [Member]
Disclosure Of Private Placement [Line Items]
Class of warrants or rights issued during the period shares	7,292,541
Private Placement [Member] \| Jefferies Private Warrants [Member]
Disclosure Of Private Placement [Line Items]
Class of warrants or rights issued during the period shares	439,627
Private Placement [Member] \| Sponsor And Jefferies Private Placement Warrants [Member]
Disclosure Of Private Placement [Line Items]
Class of warrants or rights issue price per share	$ 1.00
Proceeds from issuance of warrants	$ 7,732,168