Commitments and Contingencies - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Operating lease right-of-use assets	$ 139	$ 166
Total right-of-use assets	139	166
Liabilities
Operating lease liabilities, current	48	44
Long-term operating lease liabilities	94	126
Total operating lease liabilities	$ 142	$ 170