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Note 17 - Income Taxes - Components of Net Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Deferred income tax assets: |  |
Accrued compensation | $ 652 | $ 733
R&D expenditure capitalization | 4,366 | 3,064
Property and equipment | (1,210) | (1,249)
Other | 0 | (105)
Domestic Tax Jurisdiction [Member] |  |
Deferred income tax assets: |  |
Inventories | 4,684 |
Loss and tax credit carryforwards | 34,129 |
Intangible assets | 245 |
Property and equipment | 321 |
Other reserves | 590 |
Subtotal deferred income tax assets | 44,987 |
Valuation allowance | (43,781) |
Net deferred income tax assets | 1,206 |
Total deferred income tax liabilities | (1,210) |
Net deferred income tax liabilities | $ (4) |
Foreign Tax Jurisdiction [Member] |  |
Deferred income tax assets: |  |
Inventories |  | 5,447
Loss and tax credit carryforwards |  | 31,850
Intangible assets |  | 290
Property and equipment |  | 331
Other reserves |  | 456
Subtotal deferred income tax assets |  | 42,171
Valuation allowance |  | (40,851)
Net deferred income tax assets |  | 1,320
Total deferred income tax liabilities |  | (1,354)
Net deferred income tax liabilities |  | $ (34)

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