Leases - Summary of Components of Lease Costs (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finance lease costs:
Amortization of right-of-use assets	$ 1,766	$ 972
Interest on finance lease liabilities	940	919
Operating lease costs	2,235	2,161
Short-term lease costs	230	255
Variable lease costs	673	749
Total lease costs	$ 5,844	$ 5,056