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Stock Options Plans and Stock-Based Compensation (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 02, 2016
Dec. 27, 2014
Dec. 28, 2013
Fair value of each option grant computed on the grant date      
Risk-free interest rate, minimum 1.47% 1.65% 0.90%
Risk-free interest rate, maximum 1.75% 1.69% 1.77%
Expected volatility, minimum 46.50% 52.80% 54.00%
Expected volatility, maximum 52.40% 56.00% 58.00%
Minimum [Member]      
Fair value of each option grant computed on the grant date      
Expected life 3 years 10 months 55 days 3 years 10 months 27 days 4 years 10 days
Maximum [Member]      
Fair value of each option grant computed on the grant date      
Expected life 4 years 9 days 4 years 4 years 2 months 15 days
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Based Compensation Expense Expects to Recognize in Year One $ 2.6    
Stock Based Compensation Expense Expects to Recognize in Year Two 1.9    
Stock Based Compensation Expense Expects to Recognize in Year Three 1.3    
Stock Based Compensation Expense Expects to Recognize in Year Four $ 0.6