GOODWILL AND INTANGIBLE ASSETS - Intangible Assets Arising from Business Acquisitions (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 96,961	$ 96,961
Accumulated Amortization	39,601	36,386
Net	$ 57,360	60,575
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	15 years
Gross Carrying Amount	$ 89,096	89,096
Accumulated Amortization	37,070	34,092
Net	$ 52,026	55,004
Intellectual property
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	13 years
Gross Carrying Amount	$ 2,000	2,000
Accumulated Amortization	582	503
Net	$ 1,418	1,497
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	20 years
Gross Carrying Amount	$ 5,865	5,865
Accumulated Amortization	1,949	1,791
Net	$ 3,916	$ 4,074