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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	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Reconciliation of changes in the fair value of our financial assets
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Selling, general and administrative
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	$ 2,865	$ 0
Purchases	15,177	2,865
Transfers out	3,000	0
Unrealized gain included in earnings	2,703	0
Assets at end of period	23,745	2,865
Reconciliation of changes in the fair value of our financial liabilities
Liabilities at beginning of period	2,996	9,123
Additions	1,500	0
Total gains or losses included in earnings	(224)	1,123
Settlements	(250)	(7,250)
Liabilities at end of period	4,022	2,996
Level 3 | Galileo Technologies
Reconciliation of changes in the fair value of our financial assets
Assets at beginning of period	500	500
Purchases	36,065	0
Transfers out	(3,000)	0
Assets at end of period	$ 33,565	$ 500

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

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Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.

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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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