Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Net Income Per Share
Anti-dilutive weighted average shares excluded from calculation of weighted average number of common and common equivalent shares outstanding	372,000	124,000
Net income	$ 229	$ 198
Weighted-average number of common shares outstanding	5,092,000	5,044,000
Dilutive effect of potential common share outstanding	17,000	70,000
Weighted-average number of common and common equivalent shares outstanding	5,109,000	5,114,000
Net income per share:
Basic (in dollars per share)	$ 0.04	$ 0.04
Diluted (in dollars per share)	$ 0.04	$ 0.04