CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Income Statement [Abstract]
Net sales	$ 24,113	$ 25,059
Cost of sales	15,961	16,917
Gross profit	8,152	8,142
Operating expenses:
Research and development	799	926
Pension expense	925	1,560
Selling, general and administrative	4,990	4,850
Total operating expenses	6,714	7,336
Income from continuing operations before income taxes	1,438	806
Provision for income taxes	240	261
Income from continuing operations	1,198	545
Income (loss) from discontinued operations, net of tax	(144)	(73)
Net income	$ 1,054	$ 472
Earnings per common share - basic:
Income from continuing operations (in dollars per share)	$ 0.37	$ 0.17
Income (loss) from discontinued operations (in dollars per share)	$ (0.05)	$ (0.02)
Net income per common share (in dollars per share)	$ 0.32	$ 0.15
Earnings per common share - diluted:
Income from continuing operations (in dollars per share)	$ 0.35	$ 0.16
Income (loss) from discontinued operations (in dollars per share)	$ (0.04)	$ (0.02)
Net income per common share (in dollars per share)	$ 0.31	$ 0.14
Weighted average shares outstanding:
Basic (in shares)	3,263	3,213
Diluted (in shares)	3,392	3,267