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Inventories - Components of Inventory (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Sep. 30, 2024
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Inventory Disclosure [Abstract] |  |
Product | $ 40,415 | $ 17,912
Parts and equipment | 25,526 | 23,675
Total inventory | $ 65,941 | $ 41,587

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