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Leases - Aggregate Payments of Finance Lease Liability (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Aggregate payments of finance lease liability:    
2021 $ 89  
2022 120  
2023 120  
2024 73  
2025 37  
Total 439  
Less imputed interest (34)  
Total finance lease liability $ 405 $ 316