CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Statement of Comprehensive Income
Sales	$ 8,509	$ 5,359	$ 18,428	$ 17,922
Cost of sales	4,981	3,299	11,858	11,387
Gross profit	3,528	2,060	6,570	6,535
Operating expenses:
Selling, general and administrative (excluding pension)	1,545	1,658	4,291	4,409
Research and development	529	662	1,873	1,926
Pension	249	590	618	1,699
Total operating expenses	2,323	2,910	6,782	8,034
Operating income (loss)	1,205	(850)	(212)	(1,499)
Other expense, net	(185)	(200)	(540)	(601)
Income (loss) before income tax provision	1,020	(1,050)	(752)	(2,100)
Income tax provision	(31)	(21)	(41)	(95)
Net income (loss)	989	(1,071)	(793)	(2,195)
Net income (loss) per common share - basic and diluted	$ 0.09	$ (0.10)	$ (0.07)	$ (0.20)
Weighted average common shares outstanding - basic	11,089	11,089	11,089	11,089
Weighted average common shares outstanding -diluted	11,155	11,089	11,089	11,089
Comprehensive income (loss):
Net income (loss)	989	(1,071)	(793)	(2,195)
Other comprehensive income (loss):
Amortization of deferred pension expense	182		546
Unrealized gain (loss) on marketable securities	3	90	(8)	194
Comprehensive income (loss)	$ 1,174	$ (981)	$ (255)	$ (2,001)