Leases - Schedule of Maturities of Lease Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Operating leases
2019	$ 1,502
2020	2,780
2021	2,371
2022	1,719
2023	1,597
Thereafter	6,052
Total minimum lease payments	16,021
Less imputed interest	(2,883)
Lease liability	13,138	$ 13,300
Finance leases
2019	280
2020	855
2021	872
2022	889
2023	907
Thereafter	6,409
Total minimum lease payments	10,212
Less imputed interest	(2,110)
Lease liability	$ 8,102