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Note 13 - Income Taxes - Schedule of Reconciliation of Statutory Federal Tax Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Benefit based on federal statutory rate | $ (800) | $ (145) | $ (1,894)
Stock-based compensation | 880 | 254 | 24
Change in state tax rate | 814 | 0 | 0
Warrants | 0 | 0 | (476)
State income tax, net of federal tax benefit | (31) | (45) | (785)
Section 162(m) limitation | 169 | 0 | 0
Other permanent differences | 18 | 299 | 47
Research and development credits | (277) | 0 | 0
Change in uncertain tax position reserve | 382 | 0 | 0
Return to provision | (213) | 0 | 0
Change in valuation allowance | (927) | (116) | 3,084
Income tax expense | $ 15 | $ 247 | $ 0

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