v3.8.0.1
Stockholders’ Equity - Summary of Stock Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Dec. 31, 2016
Employee Stock Option      
Stock Options, Number of Shares      
Outstanding at December 31, 2016 (shares) 4,312,000    
Granted (shares) 974,000 1,400,000  
Exercised (shares) (583,000)    
Canceled and forfeited (shares) (215,000)    
Outstanding at July 1, 2017 (shares) 4,488,000   4,312,000
Options vested and exercisable at end of period (shares) 2,769,000    
Stock Options, Additional Disclosures      
Options outstanding, weighted average remaining contractual term 6 years 7 months 38 days   6 years 5 months 11 days
Options vested and exercisable at end of period, Weighted Average Remaining Contractual Term 5 years 3 months 15 days    
Stock Options, Weighted-Average Exercise Price (usd per share)      
Outstanding at December 31, 2016 (usd per share) $ 6.64    
Granted (usd per share) 12.82 $ 6.68  
Exercised (usd per share) 4.47    
Canceled and forfeited (usd per share) 12.72    
Outstanding at July 1, 2017 (usd per share) 7.97   $ 6.64
Options vested and exercisable, weighted average exercise price (usd per share) $ 6.64    
Stock Options, Aggregate Intrinsic Value      
Options, outstanding, aggregate intrinsic value, beginning of period $ 13,042    
Options, outstanding, aggregate intrinsic value, end of period 36,960   $ 13,042
Options vested and exercisable at end of period, Aggregate Intrinsic Value $ 26,869    
Restricted stock units      
Restricted Stock Units, Number of Shares      
Outstanding at December 31, 2016 (shares) 1,780,000    
Granted (shares) 1,085,000    
Settled (RSUs) (shares) (421,000)    
Canceled and forfeited (shares) (541,000)    
Outstanding at July 1, 2017 (shares) 1,903,000   1,780,000
Restricted Stock Units, Weighted Average Grant Date Fair Value (usd per share)      
Outstanding at December 31, 2016 (usd per share) $ 7.08    
Granted (usd per share) 11.59    
Settled (RSUs) (usd per share) 7.59    
Canceled and forfeited (usd per share) 7.08    
Outstanding at July 1, 2017 (usd per share) $ 9.54   $ 7.08