Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Stock Options Activity (Details)

v3.19.2
Stockholders' Equity - Summary of Stock Options Activity (Details)
 6 Months Ended 12 Months Ended
Jun. 30, 2019
$ / shares
shares
Dec. 31, 2018
$ / shares
shares
Class Of Stock [Line Items]    
Stock Options Outstanding, Beginning balance | shares 1,127,336  
Stock Options, Exercised | shares (75,315)  
Stock Options, Forfeited | shares (35,316)  
Stock Options Outstanding, Ending balance | shares 1,016,705 1,127,336
Stock Options, Vested and exercisable | shares 902,341  
Stock Options, Vested and expected to vest | shares 1,009,324  
Outstanding, Weighted-average exercise price, Beginning balance $ 34.89  
Weighted-average exercise price, Exercised 24.96  
Weighted-average exercise price, Forfeited 44.45  
Outstanding, Weighted-average exercise price, Ending balance 35.30 $ 34.89
Weighted-average exercise price, Vested and exercisable 34.12  
Weighted-average exercise price, Vested and expected to vest $ 35.23  
Remaining weighted-average contractual term, Outstanding 3 years 4 months 2 days 3 years 10 months 2 days
Remaining weighted-average contractual term, Vested and exercisable 3 years 3 months 7 days  
Remaining weighted-average contractual term, Vested and expected to vest 3 years 4 months 2 days  
Outstanding, Per share average intrinsic value $ 32.51 $ 89.28
Per share average intrinsic value, Vested and exercisable 33.82  
Per share average intrinsic value, Vested and expected to vest 32.59  
Minimum    
Class Of Stock [Line Items]    
Outstanding, Price per share, Beginning balance 0.75  
Price per share, Exercised 0.75  
Price per share, Forfeited 38.54  
Outstanding, Price per share, Ending balance 0.75 0.75
Price per share, Vested and exercisable 0.75  
Price per share, Vested and expected to vest 0.75  
Maximum    
Class Of Stock [Line Items]    
Outstanding, Price per share, Beginning balance 83.30  
Price per share, Exercised 58.95  
Price per share, Forfeited 58.95  
Outstanding, Price per share, Ending balance 83.30 $ 83.30
Price per share, Vested and exercisable 83.30  
Price per share, Vested and expected to vest $ 83.30