Leases and Contingencies - Summary of Lease Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Lease Liabilities Payments Due [Abstract]
Operating lease expense	$ 946	$ 975	$ 1,893	$ 1,950
Short-term lease expense	26	21	54	42
Total lease expense	$ 972	$ 996	$ 1,947	$ 1,992