OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income and Expenses [Abstract]
Other income (expense)	$ 386	$ 806	$ 1,192	$ 2,199
Foreign currency transaction gain (loss), before tax	77	72	(302)	441
Net periodic benefit income	226	392	680	1,170
Investment income, net	$ 249	$ 499	$ 877	216
Technology recognition award				$ 700