v3.21.1
Cover Page
 3 Months Ended
Mar. 31, 2021
shares
Document Information [Line Items]  
Document Type 10-Q
Document Period End Date Mar. 31, 2021
Amendment Flag false
Document Fiscal Period Focus Q1
Document Fiscal Year Focus 2021
Entity Current Reporting Status No
Entity Filer Category Non-accelerated Filer
Entity Registrant Name Genesis Park Acquisition Corp.
Entity Interactive Data Current Yes
Current Fiscal Year End Date --12-31
Entity Central Index Key 0001819810
Entity Incorporation, State or Country Code E9
Entity Address, State or Province TX
Document Quarterly Report true
Document Transition Report false
Entity Shell Company true
Entity Small Business true
Entity Emerging Growth Company true
Entity Ex Transition Period false
Title of 12(b) Security Class A ordinary shares
Trading Symbol GNPK
Security Exchange Name NYSE
Common Class A [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 16,377,622
Common Class B [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 4,094,406
Capital Units [Member]  
Document Information [Line Items]  
Title of 12(b) Security Units
Trading Symbol GNPK. U
Security Exchange Name NYSE
Warrant [Member]  
Document Information [Line Items]  
Title of 12(b) Security Warrants
Trading Symbol GNPK WS
Security Exchange Name NYSE