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FAIR VALUE MEASUREMENT OF FINANCIAL INSTRUMENTS - Reconciliation of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3 (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Reconciliation of changes in the fair value of our financial liabilities
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]			Selling, general and administrative
Level 3
Reconciliation of changes in the fair value of our financial assets
Assets at beginning of period			$ 23,700
Assets at end of period	$ 26,300		26,300
Reconciliation of changes in the fair value of our financial liabilities
Liabilities at beginning of period	5,030	$ 2,996	4,022	$ 2,996
Additions	0	1,000	500	1,500
Total gains or losses included in earnings	4,050	0	5,808	(250)
Settlements	(500)	0	(1,750)	(250)
Liabilities at end of period	8,580	3,996	8,580	3,996
Level 3 | Galileo Technologies
Reconciliation of changes in the fair value of our financial assets
Assets at beginning of period	35,140	3,500	33,565	500
Purchases	41	33,024	2,116	36,024
Accrued interest	2,001	0	2,001	0
Transfers out	0	0	(500)	0
Assets at end of period	$ 37,182	$ 36,524	$ 37,182	$ 36,524

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Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis Accrued Interest

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Indicates line item in statement in which net income is reported that includes gain (loss) from liability measured at fair value using unobservable input (level 3).

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