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Income Taxes - Schedule of Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Deferred tax assets: |  |
Federal and state net operating loss and tax credit carryforwards | $ 140,962 | $ 126,547
Inventory adjustments | 21,286 | 7,914
Property, equipment and other assets | 7,900 | 6,199
Warranty and other reserves | 7,789 | 6,613
Incentive compensation | 7,565 | 8,621
Uncertain tax positions | 705 | 705
Other | 1,953 | 4,816
Total deferred tax assets | 188,160 | 161,415
Valuation allowance | (35,758) | (27,578)
Total deferred tax assets, net of valuation allowance | 152,402 | 133,837
Operating lease right-of-use assets | (8,449) | (4,286)
Intangible assets | (1,306) | (1,026)
Total deferred tax liabilities | (9,755) | (5,312)
Net deferred tax assets | $ 142,647 | $ 128,525

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