CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 26, 2014	Sep. 27, 2013
Statement of Comprehensive Income
Sales	$ 7,656	$ 8,509	$ 20,040	$ 18,428
Cost of sales	4,371	4,981	12,669	11,858
Gross profit	3,285	3,528	7,371	6,570
Operating expenses:
Selling, general and administrative	1,637	1,545	5,211	4,291
Research and development	537	529	1,608	1,873
Pension	359	249	777	618
Total operating expenses	2,533	2,323	7,596	6,782
Operating income (loss)	752	1,205	(225)	(212)
Other expense, net	(192)	(185)	(567)	(540)
Income (loss) before income tax provision	560	1,020	(792)	(752)
Income tax (provision) benefit	79	(31)	12	(41)
Net income (loss)	639	989	(780)	(793)
Net income (loss) per common share - basic and diluted	$ 0.06	$ 0.09	$ (0.07)	$ (0.07)
Weighted average common shares outstanding - basic	11,089	11,089	11,089	11,089
Weighted average common shares outstanding - diluted	11,435	11,155	11,089	11,089
Comprehensive income (loss):
Net income (loss)	639	989	(780)	(793)
Other comprehensive income:
Reclassification of realized gains from sale of marketable securities to net income (loss)				(26)
Unrealized gain on marketable securities		3		18
Reclassification of pension expense to net income (loss)	101	182	305	546
Other comprehensive income, net of tax	101	185	305	538
Total comprehensive income (loss)	$ 740	$ 1,174	$ (475)	$ (255)