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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets Arising from Business Acquisitions (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Sep. 30, 2022
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 100,961 | $ 100,961
Accumulated Amortization | 37,171 | 33,807
Net | $ 63,790 | 67,154
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 | 31,115 | 28,137
Net | $ 57,981 | 60,959
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 | 423 | 328
Net | $ 1,577 | 1,672
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 | 1,633 | 1,475
Net | $ 4,232 | 4,390
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Estimated Useful Lives | 5 years |
Gross Carrying Amount | $ 4,000 | 4,000
Accumulated Amortization | 4,000 | 3,867
Net | $ 0 | $ 133

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