Organization and Summary of Significant Accounting Policies - Summary of Long-term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Liabilities Noncurrent [Abstract]
Operating leases	$ 3,949	$ 3,021
Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List	us-gaap:LiabilitiesNoncurrent	us-gaap:LiabilitiesNoncurrent
Deferred payroll taxes	$ 243	$ 0
Finance leases	96	164
Deferred revenue	76	119
Other	23	11
Total	$ 4,387	$ 3,315