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Stockholders' Equity (Details 3) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 01, 2016
Schedule of Employee Service Share-based Compensation [Line Items]  
Options,Outstanding at January 2, 2015 3,175
Options, Granted, Shares 1,155
Options, Exercised, Shares (476)
Options, Forfeited or expired, Shares (231)
Options,Outstanding at January 1, 2016 3,623
Options,Exercisable at January 1, 2016 2,075
Weighted Average Exercise Price, Options Outstanding at January 2, 2015 $ 7.79
Weighted Average Exercise Price, Options, Granted 7.81
Weighted Average Exercise Price,Options, Exercised 4.56
Weighted Average Exercise Price, Options, Forfeited and Expired 10.57
Weighted Average Exercise Price, Options Outstanding at January 1, 2016 8.02
Weighted Average Exercise Price, Exercisable at January 1, 2016 $ 7.15
Weighted Average Remaining Contractual Term, Options, Outstanding at January 1, 2016 6 years 7 months 2 days
Weighted Average Remaining Contractual Term, Options, Exercisable at January 1, 2016 4 years 10 months 6 days
Aggregate Intrinsic Value, Options, Outstanding at January 1, 2016 $ 3,562
Aggregate Intrinsic Value, Options, Exercisable at January 1, 2016 $ 3,352