Note 10 - Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Net operating loss carryforward	$ 4,801,000	$ 7,601,000
Deferred tax assets	4,801,000	7,601,000
Deferred tax liabilities:
Net deferred tax assets	4,801,000	7,601,000
Valuation allowance	(4,801,000)	(7,601,000)