Note 14 - Income Taxes - Components of Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Current tax expense/(benefit)	$ 1,194	$ 1,069
Deferred tax expense/(benefit)	1,037,940	1,159,347
Change in valuation allowance	(1,036,746)	(1,158,278)
Total tax expense/(benefit)	1,194	1,069
Bad Debt Allowance [Member]
Deferred tax expense/(benefit)	11,226	(23,699)
Operating Loss Carryforward [Member]
Deferred tax expense/(benefit)	1,060,942	1,140,957
Amortization of Intangibles [Member]
Deferred tax expense/(benefit)	5,482	5,482
Patent Litigation Settlement [Member]
Deferred tax expense/(benefit)	$ (40,904)	$ 35,538