Quarterly Results (Unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Quarterly Results (Unaudited)
Net sales	$ 16,897,000	$ 15,385,000	$ 15,428,000	$ 13,973,000	$ 15,019,000	$ 14,413,000	$ 12,942,000	$ 10,999,000	$ 61,683,201	$ 53,372,698	$ 41,547,788
Gross profit	8,477,000	7,625,000	7,605,000	7,111,000	7,564,000	7,129,000	6,457,000	5,499,000	30,817,645	26,648,752	20,038,662
Income (loss) from operations	1,687,000	713,000	834,000	(21,000)	588,000	(491,000)	(1,309,000)	(465,000)	3,213,048	(1,677,416)	208,559
Net income (loss) before taxes	$ 1,575,000	$ 735,000	$ 884,000	$ (112,000)	$ 450,000	$ (535,000)	$ (1,393,000)	$ (460,000)	$ 3,082,288	$ (1,938,466)	$ 270,329
Net income (loss) per common share - basic (in dollars per share)	$ 0.09	$ 0.04	$ 0.05	$ (0.01)	$ 0.03	$ (0.02)	$ (0.10)	$ (0.01)	$ 0.17	$ (0.11)	$ (0.02)
Net income (loss) per common share - diluted (in dollars per share)	$ 0.08	$ 0.04	$ 0.05	$ (0.01)	$ 0.03	$ (0.02)	$ (0.10)	$ (0.01)	$ 0.17	$ (0.11)	$ (0.02)