Note 5 - Premises and Equipment - Components of Premises and Equipment (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Land	$ 12,936,223	$ 6,655,796
Buildings (useful lives 15 to 50 years)	51,546,499	34,615,006
Furniture and equipment (useful lives 3 to 10 years)	28,458,946	24,953,570
Premises and equipment	92,941,668	66,224,372
Less accumulated depreciation	32,298,160	28,874,020
Premises and equipment, net	$ 60,643,508	$ 37,350,352