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Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment loss on intangible assets | $ 65,665 | $ 40,384 | $ 73,709 | $ 54,343 | $ 171,824

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