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INCOME TAXES - Effective income tax rate (Details)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
INCOME TAXES    
Federal statutory income tax rate 21.00% 21.00%
Increases (decreases):    
State and local income taxes, net of Federal tax benefit, if applicable (0.40%) (5.00%)
Other nondeductible expenses (11.50%) (13.60%)
Valuation allowance changes (9.60%) 21.10%
Effective income tax rate (0.50%) 23.50%