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Note 11 - Income Taxes - Schedule of Statutory Federal Income Tax Applied to Loss Before Income Tax (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]    
Statutory federal income tax rate of 21 percent applied to loss before income taxes $ (3,032) $ (2,583)
State taxes - net of federal benefit (660) (810)
Meals and entertainment 1 3
Warrants 0 (12)
Stock-based compensation 371 522
Other non-deductible expenses 16 (89)
Expiration of tax attributes 184 484
Change in tax rate (346) 207
Others (49) 0
Valuation allowance 3,515 2,278
Income tax expense $ 0 $ 0