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Leases - Aggregate Payments of Finance Lease Liability (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Aggregate payments of finance lease liability:    
2021 $ 94  
2022 94  
2023 94  
2024 47  
2025 12  
Total 341  
Less imputed interest (25)  
Total finance lease liability $ 316 $ 204