Note 8 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Computed tax at expected statutory rate	$ (54,104)	$ (877,791)
State and local income taxes, net of federal benefit	(2,971)	(9)
Non-US income taxed at different rates	14,635	(15,535)
Effect of change in corporate tax rate		321,925
Deferred compensation	(6,508)
Non-deductible expenses	4,794	14,580
Valuation allowance	(227,182)	193,584
Other	(25,916)	(2,184)
Total tax expense (benefit)	$ (297,252)	$ (365,430)