Note 16 - Summary of Quarterly Data (Unaudited) (Details) - USD ($)	3 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	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, 2012
Revenue, Net	$ 1,794,910	$ 1,804,614	$ 1,091,182	$ 1,162,218	$ 2,008,715	$ 2,130,412	$ 1,116,467	$ 1,050,242	$ 1,423,000	$ 1,339,931	$ 1,964,338	$ 1,738,903
Gross Profit	1,132,731	807,794	381,991	362,105	780,893	1,124,914	428,031	360,838	727,268	572,192	856,177	812,501
Net Income (Loss)	$ 315,311	$ 109,631	$ (276,663)	$ (270,656)	$ 239,407	$ 386,911	$ (297,655)	$ (320,287)	$ 9,347	$ (133,777)	$ 119,431	$ 143,804
Net Income (Loss) per Common Share, Basic (in dollars per share)	$ 0.19	$ 0.07	$ (0.17)	$ (0.17)	$ 0.15	$ 0.24	$ (0.18)	$ (0.20)	$ 0.01	$ (0.08)	$ 0.08	$ 0.09
Net Income (Loss) per Common Share, Diluted (in dollars per share)	$ 0.19	$ 0.07	$ (0.17)	$ (0.17)	$ 0.14	$ 0.23	$ (0.18)	$ (0.20)	$ 0.01	$ (0.08)	$ 0.07	$ 0.09