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Note 6 - Income Taxes - Significant Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | ---
Inventories | $ 4,241 | $ 2,154
R&D expenses | 1,328 | 832
Stock-based compensation | 1,042 | 600
Accrued expenses and reserves | 427 | 515
Property and equipment depreciation, assets | 4 |
Property and equipment depreciation, liabilities |  | (683)
Net operating loss carry forwards and credits | 726 | 201
Foreign currency translation loss | 0 | 0
Total deferred tax asset | 7,768 | 3,619
Goodwill | (1,146) | (1,123)
Unrealized loss on investments, liabilities | (16) |
Unrealized loss on investments, assets |  | 204
Prepaid expenses | (141) | (193)
Intangibles | (254) | (153)
Foreign currency translation gain | (238) | (36)
Total deferred tax liability | (1,795) | (1,301)
Net deferred tax asset | $ 5,973 | $ 2,318

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