Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Revenues:
Product sales	$ 15,351,053	$ 21,719,427	$ 22,948,993
Research and development under cooperative agreement		42,254	188,597
Total revenues	15,351,053	21,761,681	23,137,590
Cost of product sales	13,195,501	17,061,720	17,510,556
Cost of research and development under cooperative agreement		34,970	156,224
Gross margin	2,155,552	4,664,991	5,470,810
Selling, general, and administrative expenses	3,336,631	4,045,834	4,254,977
Income (loss) from operations	(1,181,079)	619,157	1,215,833
Other income	51,318	5,694	5,083
Income (loss) before income tax	(1,129,761)	624,851	1,220,916
Income tax provision (benefit)	(676,144)	174,232	218,148
Net income (loss)	$ (453,617)	$ 450,619	$ 1,002,768
Net income (loss) per basic common share	$ (0.03)	$ 0.03	$ 0.08
Weighted average number of basic common shares outstanding	13,201,284	13,180,428	13,096,183
Net income (loss) per diluted common share	$ (0.03)	$ 0.03	$ 0.07
Weighted average number of diluted common shares outstanding	13,201,284	13,639,074	13,703,005