Note 11 - Quarterly Results of Operations (Unaudited) (Details) - Summary of Quarterly Results of Operations (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Fiscal year ended 2013
Net sales and service income	$ 33,357,592	$ 35,216,403	$ 38,079,530
Gross profit	9,573,320	10,361,443	11,550,848
Basic earnings (loss) per common share (in Dollars per share)	$ 0.17	$ 0.12	$ 0.25
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.17	$ 0.12	$ 0.25
First Quarter [Member]
Fiscal year ended 2013
Net sales and service income	9,616,198	9,004,395	9,229,446
Gross profit	3,145,828	2,739,021	2,879,565
Net income	797,417	446,780	740,635
Basic earnings (loss) per common share (in Dollars per share)	$ 0.08	$ 0.04	$ 0.07
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.08	$ 0.04	$ 0.07
Second Quarter [Member]
Fiscal year ended 2013
Net sales and service income	8,225,039	9,230,956	8,896,705
Gross profit	2,145,797	2,527,319	2,684,710
Net income	296,309	(76,279)	598,706
Basic earnings (loss) per common share (in Dollars per share)	$ 0.03	$ (0.01)	$ 0.06
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.03	$ (0.01)	$ 0.06
Third Quarter [Member]
Fiscal year ended 2013
Net sales and service income	7,155,201	8,498,773	8,695,205
Gross profit	2,028,862	2,587,836	2,567,397
Net income	235,520	459,298	467,577
Basic earnings (loss) per common share (in Dollars per share)	$ 0.02	$ 0.05	$ 0.05
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.02	$ 0.05	$ 0.05
Fourth Quarter [Member]
Fiscal year ended 2013
Net sales and service income	8,361,154	8,482,279	11,258,174
Gross profit	2,252,833	2,507,267	3,419,176
Net income	$ 340,470	$ 420,693	$ 729,389
Basic earnings (loss) per common share (in Dollars per share)	$ 0.03	$ 0.04	$ 0.07
Diluted earnings (loss) per common share (in Dollars per share)	$ 0.03	$ 0.04	$ 0.07