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Leases (Schedule Of Future Minimum Payments Operating Leases) (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
2021 $ 494,000  
2022 640,000  
2023 650,000  
2024 628,000  
2025 588,000  
2026 and beyond 3,395,000  
Undiscounted cash flow 6,395,000  
Imputed Interest (1,170,000)  
Total lease liability $ 5,225,000 $ 5,332,000