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INTANGIBLE ASSETS - Summary of intangible assets (Details) - USD ($)
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
INTANGIBLE ASSETS    
Internally developed software (5-year useful life)   $ 157,221
Customer relationships (10-year useful life) $ 621,000 621,000
Intellectual property (5-15 years) 917,350 917,350
Intangible assets, gross 1,538,350 1,695,571
Less: Accumulated amortization 1,001,995 933,020
Impairment losses $ 536,355 157,221
Intangible assets, net   $ 605,330