Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Share-Based Compensation - Narrative (Details)

v3.10.0.1
Stockholders' Equity and Share-Based Compensation - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of stock options granted (in shares)     554,000  
Number of options exercised (in shares)     0  
Number of stock options forfeited (in shares)     127,000  
Number of stock options expired (in shares)     489,000  
Time Based RSU        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested (in shares)     357,000  
Performance based RSU        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested (in shares)     131,000  
Restricted stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vested (in shares)     488,000  
Shares withheld to satisfy employee tax obligations (in shares)     184,000  
Adjustment related employee tax obligations     $ 430  
Compensation expense $ 156 $ 555 1,158 $ 1,668
Unrecognized compensation expense $ 4,471   $ 4,471