Note 13 - Federal and State Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Balance, beginning	$ 1,225,959	$ 1,002,291
Impact of tax positions taken during current year	319,047	468,055
Gross increase related to tax positions of prior years	17,789	16,965
Reduction as a result of a lapse of the applicable statute of limitations	(215,828)	(261,352)
Balance, ending	$ 1,346,967	$ 1,225,959