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Operating Leases - Future Minimum Lease Payments (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Finance Minimum Lease Payments    
2020 $ 204  
2021 414  
2022 239  
2023 27  
Total lease payments 884  
Less: Amounts representing interest (90)  
Present value of lease liabilities $ 794 $ 977