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Commitments and Contingencies - Leases (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Assets    
Operating lease assets $ 657 $ 813
Total operating lease assets 657 813
Current liabilities:    
Operating lease liabilities, current 174 149
Noncurrent    
Operating lease liabilities, net of current portion 520 695
Total operating lease liabilities 694 844
Operating lease costs $ 215 $ 203