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GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Indefinite-lived Intangible Assets [Line Items] |  |
Cost | $ 100,505 | $ 128,617
Accumulated Amortization | 46,368 | 63,943
Total | $ 54,137 | $ 64,674
Completed technologies |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (in years) | 7 years | 6 years 10 months 24 days
Cost | $ 88,435 | $ 95,761
Accumulated Amortization | 40,104 | 39,254
Total | $ 48,331 | $ 56,507
Customer relationships |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (in years) | 5 years | 4 years 8 months 12 days
Cost | $ 5,000 | $ 25,168
Accumulated Amortization | 2,483 | 21,396
Total | $ 2,517 | $ 3,772
Trade names |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (in years) | 5 years | 5 years
Cost | $ 6,470 | $ 7,088
Accumulated Amortization | 3,278 | 2,967
Total | $ 3,192 | $ 4,121
Covenants not to compete |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period (in years) | 3 years | 3 years
Cost | $ 600 | $ 600
Accumulated Amortization | 503 | 326
Total | $ 97 | $ 274

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