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Note 7 - Income Taxes - Reconciliation of Income Tax Provision (Benefit) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Computed expected federal income tax $ 390,000 $ 218,000
State income taxes, net of federal benefit (84,000) 12,000
Foreign rate differential 14,000 38,000
Pass-through income (18,000) 0
Bargain purchase gain (790,000) 0
Stock compensation 1,000 7,000
Non-deductible expenses 230,000 6,000
Return to provision true-up 3,000 18,000
Uncertain tax positions (72,000) 9,000
Capital loss expired 645,000 0
Change in valuation allowance (627,000) 17,000
Other deferred tax adjustments 13,000 106,000
Income Tax Expense (Benefit) $ (295,000) $ 431,000