CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales:
Product	$ 6,408,931	$ 4,192,856	$ 17,994,508	$ 13,500,253
Engineering development contracts	2,369,323	1,941,636	5,535,455	4,149,919
Total net sales	8,778,254	6,134,492	23,529,963	17,650,172
Cost of sales:
Product	2,848,306	2,145,657	7,611,303	6,972,052
Engineering development contracts	2,484,492	1,373,210	5,481,559	2,836,180
Total cost of sales	5,332,798	3,518,867	13,092,862	9,808,232
Gross profit	3,445,456	2,615,625	10,437,101	7,841,940
Operating expenses:
Research and development	559,297	416,210	2,215,276	2,132,812
Selling, general and administrative	2,600,659	1,844,253	6,340,900	5,665,622
Total operating expenses	3,159,956	2,260,463	8,556,176	7,798,434
Operating income	285,500	355,162	1,880,925	43,506
Interest income	8,529	20,557	32,282	62,492
Interest (expense)		(120)		(537)
Other income	4,924	7,879	29,730	58,516
Income before income taxes	298,953	383,478	1,942,937	163,977
Income tax expense (benefit)	(8,520)	123,507	210,751	(41,888)
Net income	$ 307,473	$ 259,971	$ 1,732,186	$ 205,865
Net income per common share:
Basic (in dollars per share)	$ 0.02	$ 0.02	$ 0.10	$ 0.01
Diluted (in dollars per share)	$ 0.02	$ 0.02	$ 0.10	$ 0.01
Cash dividends per share (in dollars per share):			$ 1.50
Weighted Average Shares Outstanding:
Basic (in shares)	16,790,484	16,627,541	16,725,305	16,661,920
Diluted (in shares)	16,981,285	16,627,541	16,790,518	16,661,927