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LONG-TERM DEBT - Payments Applicable to Reduction of Principal (Details) - USD ($)
Jun. 30, 2020
Apr. 30, 2016
Payments applicable to reduction of principal amounts    
2021 $ 23,536,432  
2023 162,845,349  
2025 and thereafter 92,468,000  
Total Long-Term Debt - Face Value $ 278,849,781 $ 25,000,000.0