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Commitments and Contingencies - Summary of Lease Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Lease expense:    
Operating lease expense $ 45 $ 50
Finance lease expense:    
Depreciation of right-of-use assets   4
Total lease expense 45 54
Cash payment information:    
Operating cash used for operating leases 45 49
Financing cash used for finance leases 0 6
Total cash paid for amounts included in the measurement of lease liabilities $ 45 $ 55