Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Right-of-use asset	$ 2,500	$ 4,406
Current lease liability	2,258	1,712
Long-term lease liability	266	2,720
Total lease liability	2,524	4,432
Accrued Liabilites [Member]
Lessee Lease Description [Line Items]
Current lease liability	$ 2,258	$ 1,712