CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net sales:
Product	$ 4,739,448	$ 4,022,052
Engineering - modification and development	1,797,286	733,407
Total net sales	6,536,734	4,755,459
Cost of sales
Product	2,160,448	2,043,266
Engineering - modification and development	1,336,034	586,594
Total cost of sales	3,496,482	2,629,860
Gross profit	3,040,252	2,125,599
Operating expenses:
Research and development	850,852	790,223
Selling, general and administrative	1,804,809	1,993,575
Total operating expenses	2,655,661	2,783,798
Operating income (loss)	384,591	(658,199)
Interest income	17,572	21,779
Interest (expense)		(237)
Other income	11,545	42,069
Income (loss) before income taxes	413,708	(594,588)
Income tax expense (benefit)	96,119	(251,609)
Net income (loss)	$ 317,589	$ (342,979)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.02	$ (0.02)
Diluted (in dollars per share)	$ 0.02	$ (0.02)
Cash dividends per share (in dollars per share):	$ 1.50
Weighted Average Shares Outstanding:
Basic (in shares)	16,608,507	16,721,494
Diluted (in shares)	16,608,513	16,721,494