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Note 6 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Net operating loss carryforwards | $ 8,515 | $ 11,460
Research and development | 3,536 | 2,812
Tax credit carryforwards | 2,898 | 2,600
Accrued expenses, reserves and other | 2,909 | 2,419
Intangible assets | 1,596 | 1,521
Total deferred tax assets | 19,454 | 20,812
Valuation allowance for deferred tax assets | (2,441) | (2,416)
Net deferred tax assets | 17,013 | 18,396
Intangible assets | (8,095) | (8,176)
Accrued expenses, reserves and other | (65) | (68)
Total deferred tax liabilities | (8,160) | (8,244)
Net deferred tax assets | $ 8,853 | $ 10,152

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