Note 17 - Quarterly Data (Unaudited) - Summary of Quarterly Data (Unaudited) (Details) - USD ($)	3 Months Ended												12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	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, 2013	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Revenue, Net	$ 2,692,040	$ 1,530,244	$ 1,046,624	$ 1,376,872	$ 1,794,910	$ 1,804,614	$ 1,091,182	$ 1,162,218	$ 2,008,715	$ 2,130,412	$ 1,116,467	$ 1,050,242	$ 6,645,780	$ 5,852,924	$ 6,305,836
Gross Profit	561,720	760,814	352,080	636,351	1,132,731	807,794	381,991	362,105	780,893	1,124,914	428,031	360,838
Net Income (Loss)	$ 5,152,576	$ (8,095)	$ (464,444)	$ (47,189)	$ 315,311	$ 109,631	$ (276,663)	$ (270,656)	$ 239,407	$ 386,911	$ (297,655)	$ (320,287)	$ 4,632,848	$ (122,377)	$ 8,376
Basic (in dollars per share)	$ 2.70	$ (0.01)	$ (0.28)	$ (0.03)	$ 0.19	$ 0.07	$ (0.17)	$ (0.17)	$ 0.15	$ 0.24	$ (0.18)	$ (0.20)	$ 2.38	$ (0.07)	$ 0.01
Per share amount (in dollars per share)	$ 2.70	$ (0.01)	$ (0.28)	$ (0.03)	$ 0.19	$ 0.07	$ (0.17)	$ (0.17)	$ 0.14	$ 0.23	$ (0.18)	$ (0.20)	$ 2.38	$ (0.07)	$ 0.01