CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Details
Sales	$ 8,872	$ 6,744	$ 16,453	$ 14,787
Cost of sales	(5,654)	(4,479)	(10,556)	(9,848)
Gross profit	3,218	2,265	5,897	4,939
Operating expenses:
Selling, general and administrative	(1,685)	(1,517)	(3,431)	(3,123)
Research and development	(740)	(766)	(1,494)	(1,467)
Pension	(54)	(57)	(108)	(115)
Total operating expenses	(2,479)	(2,340)	(5,033)	(4,705)
Operating income (loss)	739	(75)	864	234
Other expense, net	(100)	(93)	(175)	(202)
Income (loss) before income tax provision	639	(168)	689	32
Income tax provision	(20)	(3)	(31)	(18)
Net income (loss)	$ 619	$ (171)	$ 658	$ 14
Net income (loss) per common share - basic	$ 0.05	$ (0.02)	$ 0.06	$ 0.00
Net income (loss) per common share - diluted	$ 0.05	$ (0.02)	$ 0.05	$ 0.00
Weighted average common shares outstanding - basic	11,353	11,353	11,353	11,353
Weighted average common shares outstanding - diluted	12,050	11,353	11,997	12,076