OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Other Income and Expenses [Abstract]
Other income (expense)	$ 1,675	$ 1,081	$ 3,056	$ 1,438
Foreign currency transaction gain (loss), before tax	(168)	320	(562)	(379)
Net periodic benefit income	1,079	227	2,027	454
Investment income, net	(331)	55	(238)	386
Rental income	462	$ 462	924	$ 924
Royalty income	$ 616		$ 616

Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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Amount of income (expense) related to nonoperating activities, classified as other.

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Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

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Ancillary revenue earned during the period from the consideration paid to the entity for the use of its rights and property by another party. Examples include licensing the use of copyrighted materials and leasing the extraction of natural resources.

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