Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Right-of-use asset	$ 2,394	$ 2,500
Long-term lease liability	404	266
Total lease liability	2,413	2,524
Accrued Liabilites [Member]
Lessee Lease Description [Line Items]
Current lease liability	$ 2,009	$ 2,258