Note 10 - Income Taxes - Summary of Deferred Tax Asset Valuation Allowance (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Beginning Balance	$ 45,000	$ 45,000
Additions charged (credited) to expense	586,706
Balance at end of year	$ 631,706	$ 45,000