Leases - Summary of Lease Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 378	$ 378
Variable lease cost	223	215
Total lease cost	601	593
Operating cash flows used for operating leases	385	$ 373
Operating lease liabilities — short-term	1,262		$ 1,227
Operating lease liabilities — long-term	$ 3,397		$ 3,725
Weighted-average remaining lease term	3 years 3 months 18 days		3 years 6 months
Weighted-average discount rate	7.60%		7.60%