Leases - Schedule of Maturity Analysis of Minimum Lease Payment Obligation Under Non-cancellable Operating Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Remaining in 2020	$ 1,758
2021	1,990
2022	540
2023 and thereafter	0
Total lease payments	4,288
Less: interest	185
Present value of lease liabilities	4,103	$ 4,432
Office Leases [Member]
Lessee Lease Description [Line Items]
Remaining in 2020	1,207
2021	1,426
2022	341
2023 and thereafter	0
Total lease payments	2,974
Less: interest	139
Present value of lease liabilities	2,835
Leased Vehicles and Office Equipment [Member]
Lessee Lease Description [Line Items]
Remaining in 2020	551
2021	564
2022	199
2023 and thereafter	0
Total lease payments	1,314
Less: interest	46
Present value of lease liabilities	$ 1,268