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INTANGIBLE ASSETS, NET - Estimated future amortization expense (Details) - USD ($)
Sep. 30, 2022
Sep. 30, 2021
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2023 $ 52,668  
2024 52,668  
2025 52,668  
2026 52,668  
2027 52,668  
Thereafter 1,463,587  
Intangible assets, net $ 1,726,928 $ 1,927,933