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Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Finite-Lived Intangible Assets [Line Items]        
Impairment loss on intangible assets $ 46,173 $ 2,659 $ 111,838 $ 43,043