Leases - Schedule of Operating Lease Costs and Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease costs	$ 2,384	$ 2,184
Operating cash flows from operating leases	2,821	2,419
Right-of-use asset obtained in exchange for lease liability	$ 251	$ 2,413