Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Income Statement [Abstract]
Product sales	$ 5,240,817	$ 3,529,672	$ 10,154,164	$ 6,872,325
Research and development under cooperative agreement	59,725	98,593	177,456	310,716
Total revenues	5,300,542	3,628,265	10,331,620	7,183,041
Cost of product sales	3,887,713	3,352,442	7,906,468	6,758,017
Cost of research and development under cooperative agreement	49,531	82,844	147,418	265,885
Gross Margin	1,363,298	192,979	2,277,734	159,139
Selling, general, and administrative expense	1,008,118	845,009	1,908,032	1,653,732
Operating income (loss)	355,180	(652,030)	369,702	(1,494,593)
Interest expense, net	(12,678)	(5,694)	(22,870)	(11,466)
Net income (loss) before income tax expense (benefit)	342,502	(657,724)	346,832	(1,506,059)
Income tax expense (benefit)	106,000	(285,000)	107,720	(599,000)
Net income (loss)	$ 236,502	$ (372,724)	$ 239,112	$ (907,059)
Net income (loss) per basic common share	$ 0.02	$ (0.03)	$ 0.02	$ (0.07)
Weighted average number of basic common shares outstanding	12,961,506	12,869,483	12,916,633	12,867,571
Net income (loss) per diluted common share	$ 0.02	$ (0.03)	$ 0.02	$ (0.07)
Weighted average number of diluted common shares outstanding	13,091,084	12,869,483	13,101,855	12,867,571