Condensed Consolidated Statements of Income (USD $)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Net sales	$ 47,182,236	$ 48,681,122	$ 60,444,867
Cost of sales	28,979,516	28,183,336	33,152,064
Gross profit	18,202,720	20,497,786	27,292,803
Operating expenses:
Selling, general and administrative expense	16,441,262	16,868,086	18,856,172
Engineering & development expense	5,930,719	5,510,207	5,405,491
Patent litigation expense	5,374,834	51,158	0
Operating Expenses	27,746,815	22,429,451	24,261,663
Operating loss	(9,544,095)	(1,931,665)	3,031,140
Other expense (income):
Interest and other income	(222,149)	(188,907)	(187,501)
Loss before income taxes	(9,321,946)	(1,742,758)	3,218,641
Income tax benefit	(2,138,000)	493,000	(1,202,000)
Net loss	$ (11,459,946)	$ (1,249,758)	$ 2,016,641
Loss per share:
Earnings Per Share, Basic	$ (2.55)	$ (0.28)	$ 0.44
Earnings Per Share, Diluted	$ (2.55)	$ (0.28)	$ 0.43