Leases - Schedule of Right-of-Use Assets and Lease Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use asset	$ 4,406	$ 0
Current lease liability	1,712	0
Long-term lease liability	2,720	$ 0
Total lease liability	$ 4,432