Statements of Operations - USD ($)	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Revenues:
Product sales	$ 14,577,183	$ 15,351,053	$ 21,719,427
Research and development under cooperative agreement			42,254
Total revenues	14,577,183	15,351,053	21,761,681
Cost of product sales	12,919,065	13,195,501	17,061,720
Cost of research and development under cooperative agreement			34,970
Gross margin	1,658,118	2,155,552	4,664,991
Selling, general, and administrative expenses	3,609,328	3,336,631	4,045,834
Income (loss) from operations	(1,951,210)	(1,181,079)	619,157
Other income	11,476	51,318	5,694
Income (loss) before income tax	(1,939,734)	(1,129,761)	624,851
Income tax provision (benefit)	(222,032)	(679,144)	174,232
Net income (loss)	$ (1,717,702)	$ (453,617)	$ 450,619
Net income (loss) per basic common share	$ (0.13)	$ (0.03)	$ 0.03
Weighted average number of basic common shares outstanding	13,203,436	13,201,284	13,180,428
Net income (loss) per diluted common share	$ (0.13)	$ (0.03)	$ 0.03
Weighted average number of diluted common shares outstanding	13,203,436	13,201,284	13,639,074