Balance Sheet Information - Summary of Long-term Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Liabilities Noncurrent [Abstract]
Operating leases	$ 4,072	$ 3,021
Deferred payroll taxes	138	0
Finance leases	128	164
Deferred revenue	100	119
Other	11	11
Total	$ 4,449	$ 3,315