OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Foreign currency transaction gain (loss), before tax	$ (376)	$ 502
Net periodic benefit income	389	787
Investment income, net	81	$ (77)
Contract award income	$ 700