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Debt - Annual Maturities of Long-Term Debt (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Annual maturities of long-term debt are as follows:    
2021 $ 3,019,000  
2022 4,428,000  
2023 4,601,000  
2024 11,585,000  
2025 and Thereafter 6,057,000  
Total $ 29,690,000 $ 50,258,000