Note 13 - Federal and State Income Taxes (Details) - Reconciliation of the Expected Federal Income Tax Expense (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the Expected Federal Income Tax Expense [Abstract]
Computed "expected" tax expense									$ 6,297,027	$ 6,844,665	$ 6,174,295
Computed "expected" tax expense									35.00%	35.00%	35.00%
Effect of graduated tax rates									(79,529)	(123,868)	(20,775)
Effect of graduated tax rates									(0.40%)	(0.60%)	(0.10%)
Tax exempt income, net									(2,646,275)	(1,790,049)	(1,243,660)
Tax exempt income, net									(14.70%)	(9.20%)	(7.00%)
Bank-owned life insurance									(585,312)	(624,847)	(544,292)
Bank-owned life insurance									(3.30%)	(3.20%)	(3.10%)
State income taxes, net of federal benefit, current year									497,068	758,695	730,865
State income taxes, net of federal benefit, current year									2.80%	3.90%	4.10%
Change in unrecognized tax benefits									(6,395)	37,180	(149,183)
Change in unrecognized tax benefits										0.20%	(0.80%)
Acquisition costs										248,952
Acquisition costs										1.30%
Noncontrolling interests											(166,081)
Noncontrolling interests											(0.90%)
Other									(437,614)	(732,786)	(246,568)
Other									(2.40%)	(3.80%)	(1.50%)
	$ 344,497	$ 1,028,876	$ 1,193,312	$ 472,285	$ 608,138	$ 1,038,793	$ 1,857,091	$ 1,113,920	$ 3,038,970	$ 4,617,942	$ 4,534,601
									17.00%	23.60%	25.70%