Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 30, 2013	Sep. 29, 2012
Income Statement [Abstract]
Product sales	$ 5,918,725	$ 2,605,465	$ 16,072,889	$ 9,477,790
Research and development under cooperative agreement	55,764	138,716	233,220	449,432
Total Revenues	5,974,489	2,744,181	16,306,109	9,927,222
Cost of product sales	4,209,683	2,862,384	12,116,150	9,620,401
Cost of research and development under cooperative agreement	46,654	117,904	194,072	383,789
Gross Margin	1,718,152	(236,107)	3,995,887	(76,968)
Selling, general and administrative expense	1,059,033	641,046	2,967,066	2,294,778
Operating income (loss)	659,119	(877,153)	1,028,821	(2,371,746)
Interest expense, net	(3,603)	(4,792)	(26,473)	(16,258)
Net income (loss) before income tax expense (benefit)	655,516	(881,945)	1,002,348	(2,388,004)
Income tax expense (benefit)	204,000	(351,000)	311,720	(950,000)
Net income (loss)	$ 451,516	$ (530,945)	$ 690,628	$ (1,438,004)
Net income (loss) per basic common share	$ 0.03	$ (0.04)	$ 0.05	$ (0.11)
Weighted average number of basic common shares outstanding	13,198,506	12,871,659	13,010,591	12,868,934
Net income (loss) per diluted common share	$ 0.03	$ (0.04)	$ 0.05	$ (0.11)
Weighted average number of diluted common shares outstanding	13,522,495	12,871,659	13,242,069	12,868,934