Note 4 - Premises and Equipment - Major Classifications of Premises and Equipment (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Land	$ 2,251,789	$ 2,250,789
Buildings and improvements	11,850,553	11,791,945
Automobile	25,115	25,115
Furniture, fixtures and equipment	11,357,768	10,746,555
Leasehold improvements	271,799	271,799
	25,757,024	25,086,203
Less accumulated depreciation	(14,885,985)	(14,545,775)
Net premises and equipment	$ 10,871,039	$ 10,540,428