Leases - Schedule of Reconciles Undiscounted Cash flows of Operating Lease Liabilities Recorded on the Condensed Consolidated Balance Sheet (Detail) $ in Thousands	Sep. 30, 2019 USD ($)
Leases [Abstract]
2019 (remaining three months)	$ 571
2020	2,109
2021	1,605
2022	934
2023	349
Thereafter	525
Total minimum lease payments	6,093
Less: amount of lease payments representing interest	(770)
Present value of future minimum lease payments	5,323
Less: current liabilities under operating leases	(1,914)
Long-term operating lease liabilities	$ 3,409