Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock Compensation - Additional Information (Detail)

v3.10.0.1
Stock Compensation - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 29, 2017
May 25, 2017
Jan. 01, 2007
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of shares authorized       18,650,000      
Number of shares, outstanding       6,839,417 6,342,526 5,136,110 5,326,505
Granted       2,457,102 2,119,498 2,617,526  
Number of shares available for grant       3,300,000 5,400,000    
Options, aggregate intrinsic value       $ 34,400,000      
Options, exercisable, intrinsic value       $ 15,500,000      
Common stock closing price (in dollars per share) $ 12.61            
Options outstanding and exercisable       2,500,000      
Options exercised during period, intrinsic value       $ 29,300,000 $ 2,800,000 $ 15,000,000.0  
Proceeds from Stock Options Exercised       8,600,000 2,200,000 4,200,000  
Fair value of options granted       6,900,000 4,800,000 6,500,000  
Fair value of options vested       5,500,000 $ 3,600,000 $ 2,200,000  
Unrecognized stock based compensation       $ 5,100,000      
Common stock issuance ESPP plan (in shares)       113,503 108,599 98,672  
Warrant              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock compensation expense         $ 0 $ 0  
Number of shares, outstanding         0 450,000 650,000
Number of shares, granted         0 0  
Weighted average exercise price, granted (in dollars per share)         $ 0 $ 0  
Employee Stock Option              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Expiration period       5 years      
Stock compensation expense       $ 5,400,000 $ 5,000,000.0 $ 5,000,000.0  
Unrecognized stock based compensation, weighted average period       2 years 1 month 6 days      
Employee Stock Purchase Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock compensation expense       $ 200,000 $ 100,000    
Discount from market price (as a percent)   15.00% 5.00%        
Minimum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period       3 years      
Maximum              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Award vesting period       4 years      
Chief Executive Officer              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Granted         200,000