OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Other Income and Expenses [Abstract]
Other income (expense)	$ 847	$ 615	$ 806	$ 1,393
Foreign currency transaction gain (loss), before tax	320	745	(379)	369
Net periodic benefit income	227	389	454	778
Investment income, net	$ 55	$ (230)	386	$ (149)
Technology recognition award			$ 700