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FORGIVABLE LOANS RECEIVABLE - Narrative (Details) - USD ($)
6 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Forgiveness of loans balance $ 310,000 $ 362,000  
Loans Receivable      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Allowance for doubtful accounts receivable $ 0   $ 0
Maximum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Interest rate (as a percent) 4.00%