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Leases - Maturity analysis under the lease agreement (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Year ending December 31, 2022 $ 733  
Year ending December 31, 2023 471  
Year ending December 31, 2024 378  
Year ending December 31, 2025 258  
Year ending December 31, 2026 103  
Total 1,943  
Less: Present value discount (192)  
Lease liability $ 1,751 $ 2,104