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Leases - Maturities of Lease Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
2021 $ 682  
2022 661  
2023 666  
2024 562  
2025 371  
Thereafter 556  
Total undiscounted cash flows 3,498  
Less: present value discount (481)  
Present value of net future minimum lease payments $ 3,017 $ 3,463