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Basic and Diluted Income Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2007
Dec. 31, 2007
Dec. 28, 2012
Sep. 28, 2012
Jun. 29, 2012
Mar. 30, 2012
Dec. 30, 2011
Sep. 30, 2011
Jul. 01, 2011
Apr. 01, 2011
Dec. 28, 2012
Dec. 30, 2011
Dec. 31, 2010
Numerator:                          
Net Income (loss)     $ (1,414) $ (90) $ (491) $ 232 $ 109 $ 77 $ 861 $ 300 $ (1,763) $ 1,348 $ 53
Weighted average common shares and denominator for basic calculation:                          
Weighted average common shares outstanding                     36,433 35,578 34,919
Less: Unvested restricted stock                     (180) (144) (94)
Denominator for basic calculation                     36,253 35,434 34,825
Weighted average effects of dilutive equity-based compensation awards:                          
Employee stock options                     0 859 0
Warrants 70,000 700,000                 0 585 0
Denominator for diluted calculation                     36,253 36,878 34,825
Net income (loss) per share - basic (in dollars per share)     $ (0.04) $ 0.00 $ (0.01) $ 0.01 $ 0.00 $ 0.00 $ 0.02 $ 0.01 $ (0.05) $ 0.04 $ 0.00
Net income (loss) per share - diluted (in dollars per share)     $ (0.04) $ 0.00 $ (0.01) $ 0.01 $ 0.00 $ 0.00 $ 0.02 $ 0.01 $ (0.05) $ 0.04 $ 0.00