Note 19 - Quarterly Results of Operations (Unaudited) (Details) - Quarterly Results of Operations (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
Quarterly Results of Operations [Abstract]
Total interest income	$ 22,028,027	$ 21,796,642	$ 21,105,376	$ 21,035,211	$ 21,198,832	$ 21,996,243	$ 20,139,401	$ 18,537,482
Total interest expense	4,246,814	4,321,311	4,140,033	4,185,970	4,303,100	4,685,907	4,431,349	4,346,165	16,894,128	17,766,521	19,726,613
Net interest income	17,781,213	17,475,331	16,965,343	16,849,241	16,895,732	17,310,336	15,708,052	14,191,317	69,071,128	64,105,437	57,649,260
Provision for loan/lease losses	3,647,636	1,063,323	1,001,879	1,094,162	1,985,517	1,366,984	1,520,137	1,057,782	6,807,000	5,930,420	4,370,767
Noninterest income	5,838,604	5,067,642	5,344,213	4,746,841	7,726,390	5,934,653	6,948,756	5,204,029	20,997,300	25,813,828	16,621,295
Noninterest expense	16,634,863	16,388,109	16,106,529	16,140,420	18,212,541	17,027,268	15,234,349	13,958,500	65,269,921	64,432,658	52,258,947
Income before taxes	3,337,318	5,091,541	5,201,148	4,361,500	4,424,064	4,850,737	5,902,322	4,379,064	17,991,507	19,556,187	17,640,841
Federal and state income tax expense	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
Net income	$ 2,992,821	$ 4,062,665	$ 4,007,836	$ 3,889,215	$ 3,815,926	$ 3,811,944	$ 4,045,231	$ 3,265,144	$ 14,952,537	$ 14,938,245	$ 12,617,767
Earnings per common share:
Basic (in Dollars per share)	$ 0.38	$ 0.51	$ 0.46	$ 0.40	$ 0.51	$ 0.52	$ 0.60	$ 0.50	$ 1.75	$ 2.13	$ 1.88
Diluted (in Dollars per share)	$ 0.37	$ 0.50	$ 0.45	$ 0.40	$ 0.50	$ 0.51	$ 0.59	$ 0.49	$ 1.72	$ 2.08	$ 1.85