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Leases - Future lease payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2022 $ 1,037  
2023 509  
2024 508  
2025 508  
2026 386  
Total lease payments 2,948  
Less: imputed interest 166  
Total operating lease liabilities 2,782  
Total operating lease liabilities balance sheet presentation:    
Current lease liabilities 1,091 $ 390
Non-current lease liabilities 1,691 $ 75
Total operating lease liabilities $ 2,782