Leases - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Weighted average incremental borrowing rate	13.10%	13.10%
Remaining operating lease term	3 years 1 month 6 days	4 years 1 month 6 days
Operating lease cost	$ 200,000	$ 200,000	$ 400,000
Cash paid for operating lease	$ 300,000
Lease expiration month and year	2019-12
Lease exit costs		0
Asset retirement obligation		$ 300,000