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Commitments and Contingencies - Summary of Lease Costs (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Lease expense:        
Operating lease expense $ 46 $ 58 $ 92 $ 108
Finance lease expense:        
Depreciation of right-of-use assets   3   7
Total lease expense 46 61 92 115
Cash payment information:        
Operating cash used for operating leases 54 56 91 106
Financing cash used for financing leases   3 0 8
Total cash paid for amounts included in the measurement of lease liabilities $ 54 $ 59 $ 91 $ 114