Leases - Summary of Operating Lease Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets And Liabilities Lessee [Abstract]
Right-of-use assets	$ 5,785	$ 6,464
Current lease liabilities	1,433	1,221
Long-term lease liabilities	4,805	5,774
Total lease liabilities	$ 6,238	$ 6,995