Condensed Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 12,472,200	$ 12,077,325	$ 24,824,192	$ 23,804,850
Cost of sales	7,517,694	7,374,592	14,940,334	14,293,184
Gross profit	4,954,506	4,702,733	9,883,858	9,511,666
Operating expenses:
Selling, general and administrative expense	3,923,733	4,131,872	7,795,026	8,144,770
Engineering & development expense	1,311,300	1,472,144	2,672,892	2,913,584
Patent litigation expense	0	169,197	0	249,826
Operating Expenses	5,235,033	5,773,213	10,467,918	11,308,180
Operating loss	(280,527)	(1,070,480)	(584,060)	(1,796,514)
Interest income	(7,031)	(48,140)	(30,759)	(132,448)
Other expense (income)	(13,993)	(1,188)	(28,830)	(11,790)
Loss before income taxes	(259,503)	(1,021,152)	(524,471)	(1,652,276)
Income tax benefit	19,000	(308,000)	(38,000)	485,000
Net loss	$ 278,503	$ 713,152	$ (562,471)	$ 1,167,276
Loss per share:
Earnings Per Share, Basic	$ (0.06)	$ (0.16)	$ (0.13)	$ (0.26)
Earnings Per Share, Diluted	$ (0.06)	$ (0.16)	$ (0.13)	$ (0.26)
Weighted average shares outstanding:
Basic	4,475,603	4,480,836	4,483,776	4,481,018
Diluted	4,475,603	4,480,836	4,483,776	4,481,018