Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Options (Details)

v3.20.2
Stock-Based Compensation - Options (Details)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Options    
Outstanding at the beginning of the period (in shares) | shares 1,150,586  
Granted (in shares) | shares 0  
Exercised (in shares) | shares (542,449)  
Forfeited (in shares) | shares (7,213)  
Outstanding at the end of the period (in shares) | shares 600,924 1,150,586
Options exercisable (in shares) | shares 560,745  
Weighted-Average Exercise Price    
Outstanding at the beginning of the period (in dollars per share) $ 25.66  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 16.97  
Forfeited (in dollars per share) 48.70  
Outstanding at the end of the period (in dollars per share) 33.23 $ 25.66
Options exercisable (in dollars per share) $ 32.10  
Weighted-Average Remaining Contractual Life    
Outstanding 4 years 3 years 4 months 24 days
Options exercisable 3 years 8 months 12 days  
Aggregate Intrinsic Value    
Outstanding (in dollars) | $ $ 24,225 $ 50,590
Options exercisable (in dollars) | $ 23,238  
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Unrecognized stock-based compensation expense related to unvested stock options | $ $ 468  
Options to purchase common stock    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Unrecognized compensation expense weighted-average recognition period 1 year 7 months 6 days  
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Exercise prices of stock options outstanding (in dollars per share) $ 9.00  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Exercise prices of stock options outstanding (in dollars per share) $ 55.29