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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Net sales:
Product	$ 16,133,371	$ 26,985,899	$ 14,573,475
Engineering development contracts	653,303	983,804	5,493,609
Total net sales	16,786,674	27,969,703	20,067,084
Cost of sales:
Product	8,294,228	11,112,339	8,417,571
Engineering development contracts	374,121	369,984	4,717,778
Total cost of sales	8,668,348	11,482,323	13,135,349
Gross profit	8,118,326	16,487,380	6,931,735
Operating expenses:
Research and development	4,456,657	4,873,328	2,705,208
Selling, general and administrative	3,739,234	9,170,865	7,847,270
Total operating expenses	8,195,891	14,044,193	10,552,478
Operating (loss) income	(77,565)	2,443,187	(3,620,743)
Interest income	35,888	33,504	24,804
Other income	4,858,224	78,440	33,283
Income (loss) before income taxes	4,816,547	2,555,131	(3,562,656)
Income tax expense	247,920	568,330	2,303,478
Net income (loss)	$ 4,568,627	$ 1,986,801	$ (5,866,134)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.27	$ 0.12	$ (0.35)
Diluted (in dollars per share)	$ 0.27	$ 0.12	$ (0.35)
Weighted average shares outstanding:
Basic (in shares)	16,742,461	16,927,055	16,924,189
Diluted (in shares)	16,855,644	17,039,296	16,924,189

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