Leases, Contingencies, and Subsequent Event - Summary of Lease Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating Lease Liabilities Payments Due [Abstract]
Operating lease expense	$ 1,142	$ 947
Short-term lease expense	76	28
Total lease expense	$ 1,218	$ 975