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Stock-Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 04, 2014
Jun. 28, 2013
Jul. 04, 2014
Jun. 28, 2013
Schedule of Employee Service Share-based Compensation [Line Items]        
Employee stock options $ 675 $ 666 $ 1,472 $ 1,492
Restricted stock 232 252 525 435
Restricted stock units 764 0 1,152 0
Nonemployee stock options 12 66 34 92
Total $ 1,683 $ 984 $ 3,183 $ 2,019