Leases - Schedule of Maturities of Lease Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
2020	$ 138
2021	7
Total lease payments	145
Less imputed interest	(5)
Total lease liabilities	140
Current operating lease liabilities	$ 140	$ 323