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Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2024
Income Tax Disclosure [Abstract] |
Schedule of components of income tax expense (benefit) | The Company's expense from income taxes from continuing operations consists of the following for the periods presented:
| Fiscal Year Ended September 30,
in thousands | 2024 |  | 2023 |  | 2022
Current federal | $ | 8,377 |  |  | $ | — |  |  | $ | — |
Current state | 5,101 |  |  | 1,896 |  |  | 4,859 |
Deferred federal | 6,317 |  |  | 18,997 |  |  | 47,239 |
Deferred state | (885) |  |  | 3,065 |  |  | 1,173 |
Total expense from income taxes | $ | 18,910 |  |  | $ | 23,958 |  |  | $ | 53,271 |
Schedule of effective income tax rate reconciliation | The Company's expense from income taxes from continuing operations differs from the amount computed by applying the federal income tax statutory rate as follows for the periods presented:
| Fiscal Year Ended September 30,
in thousands | 2024 |  | 2023 |  | 2022
Income tax computed at statutory rate | $ | 33,408 |  |  | $ | 38,356 |  |  | $ | 57,538 |
State income taxes, net of federal benefit | 3,273 |  |  | 2,874 |  |  | 4,482 |
Permanent differences | 9,140 |  |  | 2,037 |  |  | 3,341 |
Stock-based compensation | 1,055 |  |  | 179 |  |  | (389) |
Tax credits | (27,918) |  |  | (20,287) |  |  | (12,081) |
Deferred rate change | 53 |  |  | 665 |  |  | 346 |
Other, net | (101) |  |  | 134 |  |  | 34 |
Total expense from income taxes | $ | 18,910 |  |  | $ | 23,958 |  |  | $ | 53,271 |
Schedule of deferred tax assets and liabilities | The tax effects of significant temporary differences that give rise to the net deferred tax assets are as follows as of September 30, 2024 and 2023:
in thousands | September 30, 2024 |  | September 30, 2023
Deferred tax assets: |  |  |
Federal and state net operating loss and tax credit carryforwards | $ | 126,547 |  |  | $ | 138,856 |
Incentive compensation | 8,621 |  |  | 11,422 |
Warranty and other reserves | 6,613 |  |  | 6,918 |
Inventory adjustments | 7,914 |  |  | 3,942 |
Property, equipment and other assets | 6,199 |  |  | 5,458 |
Uncertain tax positions | 705 |  |  | 705 |
Other | 4,816 |  |  | 2,504 |
Total deferred tax assets | 161,415 |  |  | 169,805 |
Valuation allowance | (27,578) |  |  | (30,438) |
Total deferred tax assets, net of valuation allowance | $ | 133,837 |  |  | $ | 139,367 |
Deferred tax liabilities: |  |  |
Operating lease right-of-use assets | $ | (4,286) |  |  | $ | (4,182) |
Intangible assets | (1,026) |  |  | (1,236) |
Total deferred tax liabilities | (5,312) |  |  | (5,418) |
Net deferred tax assets | $ | 128,525 |  |  | $ | 133,949 |
Schedule of unrecognized tax benefits roll forward | A reconciliation of our unrecognized tax benefits is as follows for the beginning and end of each period presented:
| Fiscal Year Ended September 30,
in thousands | 2024 |  | 2023 |  | 2022
Balance at beginning of year | $ | 3,358 |  |  | $ | 3,358 |  |  | $ | 3,358 |
Additions for tax positions related to current year | — |  |  | — |  |  | — |
Additions for tax positions related to prior years | — |  |  | — |  |  | — |
Reductions in tax positions of prior years | — |  |  | — |  |  | — |
Lapse of statute of limitations | (938) |  |  | — |  |  | — |
Balance at end of year | $ | 2,420 |  |  | $ | 3,358 |  |  | $ | 3,358 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-9 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-2 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 231 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482663/740-10-55-231 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 740 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482685/740-10-50-12 + Details
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