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Leases - Expected Minimum Lease Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Leases    
2021 $ 117  
2022 98  
2023 89  
2024 76  
Future minimum lease payments 380  
Less: Interest (50)  
Present value of operating lease liabilities $ 330 $ 415