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Stockholders' Equity (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Jan. 03, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Options, Outstanding at December 28, 2012, Shares 3,376
Options, Granted, shares 603
Options, Exercised, Shares (645)
Options, Forfeited or expired, Shares (35)
Outstanding at January 3, 2014 3,299
Exercisable at January 3, 2014 2,168
Weighted Average Exercise Price, Options, Outstanding at December 28, 2012, $ 5.89
Weighted Average Exercise Price, Options, Granted $ 6.77
Weighted Average Exercise Price,Options, Exercised $ 5.10
Weighted Average Exercise Price, Options, Forfeited and Expired $ 8.53
Weighted Average Exercise Price, Options Outstanding at January 3, 2014 $ 6.17
Weighted Average Exercise Price, Exercisable at January 3, 2014 $ 5.30
Weighted Average Remaining Contractual Term, Options, Outstanding at January 3, 2014 6 years 3 months 7 days
Weighted Average Remaining Contractual Term, Options, Exercisable at January 3, 2014 5 years 14 days
Aggregate Intrinsic Value, Options, Outstanding at January 3, 2014 $ 32,745
Aggregate Intrinsic Value, Options, Exercisable at January 3, 2014 $ 23,405