Condensed Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Income Statement [Abstract]
Net sales	$ 3,742	$ 3,143
Cost of sales	2,503	2,398
Gross profit	1,239	745
Operating expenses:
Selling	384	400
Marketing	88	123
Research and development	133	140
General and administrative	493	454
Total operating expenses	1,098	1,117
Income (loss) before interest expense and income taxes	141	$ (372)
Interest expense	6
Income (loss) before income taxes	135	$ (372)
Income tax expense	5	5
Net income (loss)	$ 130	$ (377)
Weighted average common shares outstanding:
Basic	5,154	5,154
Diluted	5,154	5,154
Net income (loss) per common share
Basic	$ 0.03	$ (0.07)
Diluted	$ 0.03	$ (0.07)