Note 15 - Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Federal tax at the statutory rate (34%)	$ 791,867	$ 382,003
Benefit from permanent differences:
State income taxes, net of Federal tax benefit	73,896	(311,126)
Bank-owned life insurance	(74,019)	(60,839)
Change in valuation allowance		(4,081,718)
Net deferred tax asset revaluation adjustment	1,150,318	0
Other, net	26,366	(99,910)
Provision (benefit) for income taxes	$ 1,968,428	$ (4,171,590)