Leases - Schedule of Maturities of the Lease Liabilities (Detail) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
Remainder of 2019	$ 1,180
2020	2,380
2021	2,278
2022	2,216
2023	2,136
Thereafter	6,049
Total lease payments	16,239
Less imputed interest	3,094
Total operating lease liabilities	$ 13,145