Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Details)

v3.19.2
Stock-Based Compensation - Summary of Stock Option Activity (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Number of Options    
Outstanding, beginning balance (in shares) | shares 13,590  
Granted (in shares) | shares 1,135  
Exercised (in shares) | shares (2,781)  
Cancelled (in shares) | shares (439)  
Outstanding, ending balance (in shares) | shares 11,505 13,590
Weighted Average Exercise Price    
Outstanding, beginning balance (in dollars per share) | $ / shares $ 6.07  
Granted (in dollars per share) | $ / shares 14.67  
Exercised (in dollars per share) | $ / shares 5.49  
Cancelled (in dollars per share) | $ / shares 7.35  
Outstanding, ending balance (in dollars per share) | $ / shares $ 7.01 $ 6.07
Weighted-average remaining contractual life, options outstanding 6 years 10 months 9 days 6 years 7 months 17 days
Aggregate intrinsic value, options outstanding | $ $ 135,174 $ 66,462
Options vested and exercisable (in shares) | shares 7,085  
Options vested and exercisable (in dollars per share) | $ / shares $ 6.12  
Weighted-average remaining contractual life, options vested and exercisable 5 years 10 months 28 days  
Aggregate intrinsic value, options vested and exercisable | $ $ 89,540