Maturities of Lease Liabilities (Detail) $ in Thousands	Sep. 30, 2019 USD ($)
Years Ended December 31,
Operating leases, 2019	$ 160
Operating leases, 2020	656
Operating leases 2021	676
Operating leases, 2022	696
Operating leases, 2023	175
Operating leases, thereafter	0
Operating leases, total mimimum lease payments	2,363
Operating leases, less amount representing interest	(230)
Operating leases present value	2,133
Finance leases, 2019	7
Finance leases, 2020	27
Finance leases, 2021	9
Finance leases, 2022	0
Finance leases, 2023	0
Finance leases, thereafter	0
Finance leases, total minimum lease payments	43
Finance leases, less amount representing interest	(4)
Finance leases present value	$ 39