Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) - Earnings per Common Share - 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
Earnings per Common Share [Abstract]
Net income available to common shareholders (in Dollars)	$ 1,430,639	$ 1,418,635	$ 1,537,949	$ 1,329,544	$ 1,782,104	$ 1,360,483	$ 1,227,683	$ 1,055,216	$ 5,716,767	$ 5,425,486	$ 4,445,187
Weighted average common shares outstanding									4,333,418	4,006,461	2,733,969
Effect of dilutive securities									55,931	68,040	79,646
Weighted average diluted shares outstanding									4,389,349	4,074,501	2,813,615
Basic income per common share (in Dollars per share)	$ 0.33	$ 0.33	$ 0.35	$ 0.31	$ 0.41	$ 0.32	$ 0.29	$ 0.33	$ 1.32	$ 1.35	$ 1.63
Diluted income per common share (in Dollars per share)	$ 0.33	$ 0.32	$ 0.35	$ 0.30	$ 0.41	$ 0.31	$ 0.28	$ 0.33	$ 1.30	$ 1.33	$ 1.58