FAIR VALUE MEASUREMENTS (Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Money Market Funds [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value	$ 0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value		$ 16,470
Fair Value, Inputs, Level 2 [Member] | Money Market Funds [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value		$ 16,470