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Note 19 - Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 40,689 | $ 36,943
Stock options | 573 | 665
Research and development credits | 641 | 641
Accruals | 311 | 477
Operating lease liabilities | 245 | 368
Property and equipment | 18 | 28
Acquisition assets | 0 | 2,257
Other deferred tax assets | 6 | 6
Deferred tax liabilities: |  |
Total deferred tax assets | 42,483 | 41,385
Operating lease right-of-use assets | (245) | (337)
Total deferred tax liabilities | (245) | (337)
Valuation allowance | (42,238) | (41,048)
Net deferred taxes | $ 0 | $ 0

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