Note 10 - Taxation - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Earnings before income tax	$ 2,626,796
Expected tax	0	0
Foreign taxes at local expected rates	48,277	29,000
Change in deferred tax asset of US subsidiary	166,000
Deferred tax expense from enacted rate reductions
Change in valuation allowance		(2,730,000)
Net tax expense (benefit)	$ 214,277	$ (2,701,396)