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Note 8 - Income Taxes - Reconciliation Between Statutory Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Tax at U.S. statutory rate	(21.00%)	(21.00%)
State taxes, net of federal benefit	(4.29%)	(4.19%)
Non-deductible items	0.26%	0.76%
Change in valuation allowance	20.59%	14.54%
True-up adjustment	4.44%	10.00%
Foreign operations	0.00%	(0.11%)
Change in tax rate	0.00%	0.00%
Other	0.00%	0.00%
Effective income tax rate	0.00%	0.00%

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying true-up adjustment.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of reported income tax benefit (expense) from difference to income tax expense (benefit) computed by applying statutory federal (national) income tax rate to pretax income (loss) from continuing operation, attributable to other reconciling items. Excludes state and local income tax expense (benefit), federal tax expense (benefit), statutory income tax expense (benefit) outside of country of domicile, tax credit, nondeductible expense, deduction, income tax settlement, income tax contingency, and cross-border tax law.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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