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Stockholders' Equity (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2016
Jan. 01, 2016
Jan. 02, 2015
Schedule of Employee Service Share-based Compensation [Line Items]      
Share-based Compensation $ 8,558 $ 3,304 $ 4,663
Employee stock options [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Share-based Compensation 5,485 2,306 2,842
Restricted stock [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Share-based Compensation 298 485 935
Restricted stock units [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Share-based Compensation 2,717 452 795
Consultant compensation [Member]      
Schedule of Employee Service Share-based Compensation [Line Items]      
Share-based Compensation $ 58 $ 61 $ 91