Stock-Based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2017 |
Jul. 01, 2016 |
Jun. 30, 2017 |
Jul. 01, 2016 |
|
Schedule of Employee Service Share-based Compensation [Line Items] | ||||
Share-based Compensation | $ 868 | $ 300 | $ 1,378 | $ 7,758 |
Employee stock options [Member] | ||||
Schedule of Employee Service Share-based Compensation [Line Items] | ||||
Share-based Compensation | 493 | 153 | 761 | 5,049 |
Restricted stock [Member] | ||||
Schedule of Employee Service Share-based Compensation [Line Items] | ||||
Share-based Compensation | 46 | 2 | 86 | 227 |
Restricted stock units [Member] | ||||
Schedule of Employee Service Share-based Compensation [Line Items] | ||||
Share-based Compensation | 329 | 145 | 531 | 2,423 |
Nonemployee stock options [Member] | ||||
Schedule of Employee Service Share-based Compensation [Line Items] | ||||
Share-based Compensation | $ 0 | $ 0 | $ 0 | $ 59 |