Note 5 - Premises and Equipment (Details) - Components of Premises and Equipment - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land	$ 6,655,796	$ 7,100,393
Buildings (useful lives 15 to 50 years)	34,615,006	31,602,931
Furniture and equipment (useful lives 3 to 10 years)	24,953,570	23,142,643
	66,224,372	61,845,967
Less accumulated depreciation	28,874,020	25,824,839
	$ 37,350,352	$ 36,021,128