CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net sales:
Product	$ 5,285,345	$ 6,714,278	$ 9,307,397	$ 13,172,152
Engineering - modification and development	1,474,876	31,792	2,208,283	103,729
Total net sales	6,760,221	6,746,070	11,515,680	13,275,881
Cost of sales
Product	2,783,129	2,873,414	4,826,395	5,770,686
Engineering - modification and development	876,376		1,462,970	38,383
Total cost of sales	3,659,505	2,873,414	6,289,365	5,809,069
Gross profit	3,100,716	3,872,656	5,226,315	7,466,812
Operating expenses:
Research and development	926,379	1,556,827	1,716,602	2,910,434
Selling, general and administrative	1,827,794	1,849,143	3,821,369	3,938,492
Total operating expenses	2,754,173	3,405,970	5,537,971	6,848,926
Operating income (loss)	346,543	466,686	(311,656)	617,886
Interest income	20,156	45,263	41,935	92,855
Interest (expense)	(180)	(404)	(417)	(862)
Other income	8,568		50,637	150,003
Income (loss) before income taxes	375,087	511,545	(219,501)	859,882
Income tax expense (benefit)	86,214	12,393	(165,395)	75,950
Net income (loss)	$ 288,873	$ 499,152	$ (54,106)	$ 783,932
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.02	$ 0.03	$ 0.00	$ 0.05
Diluted (in dollars per share)	$ 0.02	$ 0.03	$ 0.00	$ 0.05
Weighted Average Shares Outstanding:
Basic (in shares)	16,636,725	16,782,684	16,679,109	16,782,684
Diluted (in shares)	16,636,732	16,838,662	16,679,109	16,829,918