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Note 11 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Computed tax at expected statutory rate	$ (3,025,369)	$ (2,349,899)
State and local income taxes, net of federal benefit	(1,532)	(1,387)
Non-US income taxed at different rates	(138,596)	(101,856)
Deferred compensation	52,500	(31,500)
Non-deductible expenses	2,749	1,565
Non-taxable income	(541)	0
Change in valuation allowance	3,035,205	2,209,294
Other	(161,826)	210,747
Total tax expense (benefit)	$ (237,410)	$ (63,036)

X

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Amount 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 attributable to deferred compensation.

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

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Amount 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 attributable to foreign income tax expense (benefit).

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Amount 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 attributable to nondeductible expenses.

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Amount 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 attributable to other adjustments.

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Amount 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 attributable to income (loss) exempt from income taxes.

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