Leases - Summary of Other Information Related to Operating Leases (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 99	$ 96
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,015	$ 2,354
Weighted-average remaining lease term - operating leases, in years	5 years 7 months 6 days	6 years 7 months 6 days
Weighted-average discount rate - operating leases	2.47%	2.45%