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Stockholders’ Equity (Details 2) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Schedule of Employee Service Share-based Compensation [Line Items]      
Total stock-based compensation expense $ 8,558 $ 3,304 $ 4,663
Amounts capitalized as part of inventory 269 516 306
Total stock-based compensation 8,827 3,820 4,969
Cost of Sales [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total stock-based compensation expense 612 52 108
General and administrative [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total stock-based compensation expense 3,809 2,090 2,552
Marketing and selling [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total stock-based compensation expense 1,961 696 1,065
Research and development [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Total stock-based compensation expense $ 2,176 $ 466 $ 938