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Leases - Supplemental balance sheet information (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Leases    
Operating lease right-of-use assets $ 1,047 $ 1,537
Current portion of operating lease liabilities 641 623
Operating lease liabilities, net of current portion 492 1,026
Total operating lease liabilities $ 1,133 $ 1,649
Weighted average remaining lease term for operating leases (in years) 2 years 1 month 13 days 2 years 7 months 20 days
Weighted average discount rate for operating leases 5.93% 5.87%