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Leases (Schedule of Future Minimum Base Rental Payment) (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Leases [Abstract]    
2019 $ 501,000  
2020 942,000  
2021 729,000  
2022 489,000  
2023 468,000  
2024 39,000  
Thereafter  
Remaining balance of lease payments 3,168,000  
Difference between undiscounted cash flows and discounted cash flows 273,000  
Lease liabilities $ 2,895,000