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		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 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	$ 25,800	$ 8,881	$ 23,745	$ 2,865
Purchases	501	5,109	2,556	11,125
Assets at end of period	26,301	13,990	26,301	13,990
Reconciliation of changes in the fair value of our financial liabilities
Liabilities at beginning of period	3,780	3,096	4,022	2,996
Additions	0	0	500	500
Total gains or losses included in earnings	1,750	(100)	1,758	(250)
Settlements	(500)	0	(1,250)	(250)
Liabilities at end of period	5,030	2,996	5,030	2,996
Level 3 | Galileo Technologies
Reconciliation of changes in the fair value of our financial assets
Assets at beginning of period	33,107	3,500	33,565	500
Purchases	2,033	0	2,075	3,000
Transfers out	0	0	(500)	0
Assets at end of period	$ 35,140	$ 3,500	$ 35,140	$ 3,500