CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales:
Product	$ 4,114,837	$ 7,589,212	$ 12,152,290	$ 23,388,043
Engineering development contracts	804,852	2,986,764	4,777,705	10,788,759
Total net sales	4,919,689	10,575,976	16,929,995	34,176,802
Cost of sales:
Product	2,300,470	3,924,222	6,918,457	11,603,748
Engineering development contracts	687,574	3,489,627	3,734,692	11,845,367
Total cost of sales	2,988,044	7,413,849	10,653,149	23,449,115
Gross profit	1,931,645	3,162,127	6,276,846	10,727,687
Operating expenses:
Research and development	799,340	647,894	2,101,812	1,935,692
Selling, general and administrative	1,397,165	1,854,332	4,911,546	5,633,832
Total operating expenses	2,196,505	2,502,226	7,013,358	7,569,524
Operating income (loss)	(264,860)	659,901	(736,512)	3,158,163
Interest income	6,372	5,280	18,269	16,246
Other income	11,173	7,939	31,405	27,307
Income (loss) before income taxes	(247,315)	673,120	(686,838)	3,201,716
Income tax expense	3,284,658	176,090	2,615,484	911,874
Net income (loss)	$ (3,531,973)	$ 497,030	$ (3,302,322)	$ 2,289,842
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.21)	$ 0.03	$ (0.20)	$ 0.14
Diluted (in dollars per share)	$ (0.21)	$ 0.03	$ (0.20)	$ 0.13
Weighted average shares outstanding:
Basic (in shares)	16,910,475	16,951,360	16,930,522	16,918,423
Diluted (in shares)	16,910,475	17,177,572	16,930,522	17,141,532