OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Other Income and Expenses [Abstract]
Other income (expense)	$ 6,881	$ 2,107	$ 1,661
Currency exchange gains (losses)	305	(81)	(915)
Investment income (loss)	(225)	283	184
Net periodic benefit cost (credit)	(4,256)	(907)	(1,559)
Rental income	689	$ 624	$ 624
Royalty income	$ 2,250

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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