OTHER EXPENSE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other Income and Expenses [Abstract]
Foreign currency transaction gain (loss), before tax	$ (17)	$ (133)	$ (236)	$ (556)
Investment income, net	$ 104	$ 55	$ 1,365	$ 210