Note 19 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations - 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
Quarterly Results of Operations [Abstract]
Total interest income	$ 22,909,799	$ 23,141,112	$ 22,050,612	$ 21,901,730	$ 22,028,027	$ 21,796,642	$ 21,105,376	$ 21,035,211
Total interest expense	3,023,654	3,003,586	3,559,776	4,119,513	4,246,814	4,321,311	4,140,033	4,185,970	$ 13,706,529	$ 16,894,128	$ 17,766,521
Net interest income	19,886,145	20,137,526	18,490,836	17,782,217	17,781,213	17,475,331	16,965,343	16,849,241	76,296,724	69,071,128	64,105,437
Provision for loan/lease losses	1,176,516	1,635,263	2,348,665	1,710,456	3,647,636	1,063,323	1,001,879	1,094,162	6,870,900	6,807,000	5,930,420
Noninterest income	6,477,904	6,368,807	5,461,234	6,221,778	6,078,181	4,985,288	5,327,059	4,766,827	24,529,723	21,157,357	26,845,676
Noninterest expense	16,139,417	15,913,212	24,101,634	17,204,161	16,874,440	16,305,756	16,089,374	16,160,408	73,358,424	65,429,978	65,464,506
Income (loss) before taxes	9,048,116	8,957,858	(2,498,229)	5,089,378	3,337,318	5,091,541	5,201,148	4,361,500	20,597,123	17,991,507	19,556,187
Federal and state income tax expense (benefit)	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
Net income (loss)	$ 6,784,823	$ 6,488,987	$ (523,818)	$ 4,177,889	$ 2,992,821	$ 4,062,665	$ 4,007,836	$ 3,889,215	$ 16,927,881	$ 14,952,537	$ 14,938,245
EPS:
Basic (in Dollars per share)	$ 0.58	$ 0.55	$ (0.05)	$ 0.52	$ 0.38	$ 0.51	$ 0.46	$ 0.40	$ 1.64	$ 1.75	$ 2.13
Diluted (in Dollars per share)	$ 0.57	$ 0.55	$ (0.05)	$ 0.52	$ 0.37	$ 0.50	$ 0.45	$ 0.40	$ 1.61	$ 1.72	$ 2.08