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INTANGIBLE ASSETS - Estimated amortization expense of intangible assets (Details) - USD ($)
Sep. 30, 2020
Sep. 30, 2019
INTANGIBLE ASSETS    
2021 $ 91,967  
2022 91,967  
2023 91,967  
2024 91,967  
2025 89,379  
Thereafter 148,083  
Total $ 605,330 $ 734,771