Lease - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Leases [Abstract]
Sublease income for the remainder of 2022	$ 3,000		$ 3,000
Sublease income	12,000	$ 19,000	44,000	$ 47,000
Rent expense	$ 27,000	$ 40,000	$ 81,000	$ 107,000
Lease Term			15 months