BASIS OF PRESENTATION AND SUMMARY OF ACCOUNTING POLICIES - Concentrations (Details) - Customer Concentration Risk - customer	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Total Revenue
Concentration Risk [Line Items]
Number of customers	3	2	4	4
Total Revenue | One customer
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	14.00%	10.00%	10.00%
Total Revenue | Two customer
Concentration Risk [Line Items]
Concentration risk percentage	18.00%	31.00%	12.00%	14.00%
Total Revenue | Three customers
Concentration Risk [Line Items]
Concentration risk percentage	19.00%		14.00%	15.00%
Total Revenue | Four customer
Concentration Risk [Line Items]
Concentration risk percentage			21.00%	29.00%
Accounts Receivable | One customer
Concentration Risk [Line Items]
Concentration risk percentage			45.00%		77.00%
Number of customers			1		1