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Leases (Schedule of Future Minimum Lease Payments under Finance Leases) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]    
2020 $ 82  
2021 82  
2022 82  
2023 56  
2024  
2025 and thereafter  
Total minimum lease payments 302  
Less amount representing interest (16)  
Present value of net minimum lease payments $ 286 $ 336