Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Net Income Per Share
Anti-dilutive weighted average shares excluded from calculation of weighted average number of common and common equivalent shares outstanding			336,953	233,410
Net income	$ 519	$ 533	$ 748	$ 731
Weighted-average number of common shares outstanding	5,111,000	5,075,000	5,101,000	5,059,000
Dilutive effect of potential common share outstanding	19,000	28,000	18,000	47,000
Weighted-average number of common and common equivalent shares	5,130,000	5,103,000	5,119,000	5,106,000
Net income per share:
Basic (in dollars per share)	$ 0.10	$ 0.10	$ 0.15	$ 0.14
Diluted (in dollars per share)	$ 0.10	$ 0.10	$ 0.15	$ 0.14