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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2025
Goodwill and Intangible Assets [Line Items] |  |  |
Goodwill | $ 133,399,000 |  | $ 133,457,000
Goodwill impairment | 0 | $ 0 |
Amortization of acquired intangible assets | 3,286,000 | 3,657,000 |
Finite-lived intangible assets, foreign currency translation gain | 33,000 |  |
Impairment charges related to intangible assets | $ 0 | $ 0 |
Minimum |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Estimated useful lives of intangible assets (in years) | 3 years |  |
Maximum |  |  |
Goodwill and Intangible Assets [Line Items] |  |  |
Estimated useful lives of intangible assets (in years) | 7 years |  |

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