Basic and Diluted Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 28, 2012	Sep. 30, 2011	Sep. 28, 2012	Sep. 30, 2011
Numerator:
Net (loss) income	$ (90)	$ 77	$ (349)	$ 1,239
Weighted average common shares and denominator for basic calculation:
Weighted average common shares outstanding	36,495	35,695	36,378	35,442
Less: Unvested restricted stock	203	156	172	138
Denominator for basic calculation	36,292	35,539	36,206	35,304
Weighted average effects of dilutive equity-based compensation awards:
Employee stock options	0	846	0	751
Warrants	0	568	0	452
Denominator for diluted calculation	36,292	36,953	36,206	36,507
Net (loss) income per share - basic	$ 0.00	$ 0.00	$ (0.01)	$ 0.04
Net (loss) income per share - diluted	$ 0.00	$ 0.00	$ (0.01)	$ 0.03

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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