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Stockholders' Equity (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jan. 03, 2014
Dec. 28, 2012
Dec. 30, 2011
Schedule of Employee Service Share-based Compensation [Line Items]      
Total $ 4,489 $ 3,208 $ 1,914
Employee Stock Option [Member]
      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total 2,683 2,595 1,361
Restricted Stock [Member]
      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total 999 590 466
Restricted Stock Units (RSUs) [Member]
      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total 589 0 0
Consultants Stock [Member]
      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total $ 218 $ 23 $ 87