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Leases - Maturities of operating lease liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Leases    
2023 $ 691  
2024 367  
2025 94  
2026 26  
2027 26  
Thereafter 4  
Total lease payments 1,208  
Less: Imputed interest (75)  
Total operating lease liabilities $ 1,133 $ 1,649