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Long-Term Debt - Schedule of Future Maturities (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Future maturities:    
2021 (remainder) $ 352,000  
2022 729,000  
2023 762,000  
2024 802,000  
2025 15,169,000  
Thereafter 19,336,000  
Long-term debt $ 37,150,000 $ 64,876,000