GOODWILL AND INTANGIBLE ASSETS - Intangible Assets Arising from Business Acquisitions (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2022	Sep. 30, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 100,961	$ 100,461
Accumulated Amortization	32,011	26,623
Net	$ 68,950	73,838
Developed technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	15 years
Gross Carrying Amount	$ 89,096	89,096
Accumulated Amortization	26,648	22,182
Net	$ 62,448	66,914
Intellectual property
Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	13 years
Gross Carrying Amount	$ 2,000	1,500
Accumulated Amortization	300	216
Net	$ 1,700	1,284
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	20 years
Gross Carrying Amount	$ 5,865	5,865
Accumulated Amortization	1,396	1,158
Net	$ 4,469	4,707
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Estimated Useful Lives	5 years
Gross Carrying Amount	$ 4,000	4,000
Accumulated Amortization	3,667	3,067
Net	$ 333	$ 933