CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Net sales:
Product	$ 18,289,963	$ 25,174,846	$ 23,383,504
Engineering - modification and development	6,288,235	562,806	1,873,819
Total net sales	24,578,198	25,737,652	25,257,323
Cost of sales
Product	9,389,904	11,790,885	10,732,091
Engineering - modification and development	4,678,029	154,299	787,938
Total cost of sales	14,067,933	11,945,184	11,520,029
Gross profit	10,510,265	13,792,468	13,737,294
Operating expenses:
Research and development	2,693,554	5,500,924	5,234,240
Selling, general and administrative	7,400,199	7,683,637	8,099,587
Total operating expenses	10,093,753	13,184,561	13,333,827
Operating income	416,512	607,907	403,467
Interest income	101,012	143,942	188,171
Interest (expense)	(598)	(1,509)	(2,356)
Other income	65,005	150,010	50,000
Income before income taxes	581,931	900,350	639,282
Income tax (benefit) expense	(2,397,063)	183,760	(109,094)
Net income	$ 2,978,994	$ 716,590	$ 748,376
Net income per common share:
Basic (in dollars per share)	$ 0.18	$ 0.04	$ 0.04
Diluted (in dollars per share)	$ 0.18	$ 0.04	$ 0.04
Weighted Average Shares Outstanding:
Basic (in shares)	16,641,895	16,782,223	16,751,528
Diluted (in shares)	16,641,900	16,824,621	16,777,886