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, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of the Expected Federal Income Tax Expense [Abstract]
Computed "expected" tax expense									$ 7,208,993	$ 6,297,027	$ 6,844,665
Computed "expected" tax expense									35.00%	35.00%	35.00%
Effect of graduated tax rates									$ (76,973)	$ (79,529)	$ (123,868)
Effect of graduated tax rates									(0.40%)	(0.40%)	(0.60%)
Tax exempt income, net									$ (3,461,438)	$ (2,646,275)	$ (1,790,049)
Tax exempt income, net									(16.80%)	(14.70%)	(9.20%)
Bank-owned life insurance									$ (616,737)	$ (585,312)	$ (624,847)
Bank-owned life insurance									(3.00%)	(3.30%)	(3.20%)
State income taxes, net of federal benefit, current year									$ 767,557	$ 497,068	$ 758,695
State income taxes, net of federal benefit, current year									3.70%	2.80%	3.90%
Change in unrecognized tax benefits									$ 223,668	$ (55,728)	$ 63,941
Change in unrecognized tax benefits									1.10%	(0.30%)	0.30%
Acquisition costs											$ 248,952
Acquisition costs											1.30%
Other									$ (375,828)	$ (388,281)	$ (759,547)
Other									(1.80%)	(2.10%)	(3.90%)
	$ 2,263,293	$ 2,468,871	$ (1,974,411)	$ 911,489	$ 344,497	$ 1,028,876	$ 1,193,312	$ 472,285	$ 3,669,242	$ 3,038,970	$ 4,617,942
									17.80%	17.00%	23.60%