Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Stockholders' Equity and Share-Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Aug. 18, 2020
Sep. 26, 2020
Sep. 28, 2019
Sep. 26, 2020
Sep. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Net proceeds from issuance of common stock       $ 60,531  
Number of shares granted (in shares)       2,558  
Number of options exercised (in shares)       1,793  
Number of stock options forfeited (in shares)       175  
Number of stock options expired (in shares)       617  
Number of share awards released to a departing employee       56  
Number of share awards issued for payment of fees.       7  
Public equity offering          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of common stock, net of underwriters' offering expenses and commissions (in shares) 4,000        
Offering price (in dollars per share) $ 13.00        
Net proceeds from issuance of common stock $ 48,831        
Over-Allotment Option          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Issuance of common stock, net of underwriters' offering expenses and commissions (in shares) 900        
Net proceeds from issuance of common stock $ 11,700        
Period of underwriters option 30 days        
Time Based RSU          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested (in shares)       187  
Performance based RSU          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested (in shares)       1,787  
Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vested (in shares)       2,037  
Shares withheld to satisfy employee tax obligations (in shares)       37  
Adjustment related employee tax obligations       $ 888  
Compensation expense       6,466 $ 1,992
Unrecognized compensation expense   $ 9,353   $ 9,353  
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense   $ 1,773 $ 813