Description of Organization, Business Operations and Basis of Presentation - Additional Information (Detail) - USD ($)			3 Months Ended	5 Months Ended
	Dec. 21, 2020	Nov. 13, 2019	Mar. 31, 2021	Dec. 31, 2019	Dec. 31, 2020	Mar. 31, 2020
Redemption price per share					$ 10.00
Minimum tangible assets for business combination					$ 5,000,001
Interest to pay dissolution expenses				$ 100,000
Cash			$ 858,532	$ 2,456,150	1,789,687	$ 2,341,479
Working capital			4,400,000
Interest available to pay taxes			2,400,000
Proceeds from sale of founder shares			25,000
Loan from related party			$ 97,000
Purchase price			$ 9.20
Withdrawn from Trust Account			$ 100,000
PIPE Investors [Member] | Janus Parent Inc [Member]
Purchase of common shares	25,000,000		25,000,000
Purchase price	$ 10.00		$ 10.00
Officers And Directors [Member] | Janus Parent Inc [Member]
Purchase of common shares	2,400,000		2,400,000
Private Placement Warrants [Member]
Number of warrants issued		10,150,000
Issue price of warrants		$ 1.00
Proceeds from Issuance of Warrants		$ 10,150,000
IPO [Member]
Number of shares issued		34,500,000
Stock issue price		$ 10.00
Proceeds from issue of stock		$ 345,000,000
Payment of stock issue costs		19,580,000
Payment of deferred underwriting commissions		$ 12,080,000
IPO [Member] | Private Placement Warrants [Member]
Assets held in trust					$ 345,000,000
Over-Allotment Option [Member]
Number of shares issued		4,500,000
Class A Common Stock [Member]
Common Stock, Par Value			$ 0.0001		$ 0.0001