Note 6 - Income Per Common Share (Details) - Income Per Share - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Per Share [Abstract]
Basic Income per Common Share (in Dollars)	$ 1,276,605	$ 1,329,544
Basic Income per Common Share	4,360,244	4,315,229
Basic Income per Common Share (in Dollars per share)	$ 0.29	$ 0.31
Effect of Dilutive Securities	50,035	58,772
Diluted Income per Common Share (in Dollars)	$ 1,276,605	$ 1,329,544
Diluted Income per Common Share	4,410,279	4,374,001
Diluted Income per Common Share (in Dollars per share)	$ 0.29	$ 0.30