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Note 13 - Income Taxes - Significant Portion of Net Deferred Tax Asset (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Sep. 30, 2022
--- | --- | ---
Net operating loss carryforwards | $ 10,665 | $ 10,054
Research and development credit | 4,929 | 4,712
Share-based compensation | 650 | 688
Patents | 2,203 | 2,331
Accruals and other | 2,071 | 2,245
Capitalized R&E expenses | 1,916 | 0
Allowances | 237 | 280
Gross deferred tax assets | 22,671 | 20,310
Equipment | (274) | (313)
Operating ROU assets | (907) | (1,066)
Acquired intangible assets | (1,736) | (2,180)
Gross deferred tax liabilities | (2,917) | (3,559)
Less valuation allowance | (19,754) | (9,378)
Net deferred tax assets and liabilities | $ 0 | $ 7,373

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