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Income Taxes - Deferred tax assets (liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Deferred tax assets: |  |
Pension | $ 331 | $ 321
Capitalized research and development expenses | 1,155 | 651
Other reserves and accruals | 975 | 1,118
Inventory reserves and other | 303 | 278
Federal and state tax credits | 829 | 771
Federal and state net operating loss carryforwards | 4 |
Foreign net operating loss carryforwards | 2,554 | 2,945
Lease Liability | 121 | 239
Gross deferred tax assets | 6,272 | 6,323
Less: valuation allowance | (2,800) | (3,283)
Realizable deferred tax asset | 3,472 | 3,040
Deferred tax liabilities: |  |
Depreciation and amortization | (69) | (84)
ROU Asset | (119) | (235)
Pension | (550) | (372)
Intangibles |  | (3)
Realizable deferred tax liabilities | (738) | (694)
Net deferred tax assets | $ 2,734 | $ 2,346

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