Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Options (Details)

v3.20.1
Stock-Based Compensation - Options (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Options    
Outstanding at the beginning of the period (in shares) 1,150,586  
Granted (in shares) 0  
Exercised (in shares) (357,974)  
Forfeited (in shares) (7,213)  
Outstanding at the end of the period (in shares) 785,399 1,150,586
Options exercisable (in shares) 745,220  
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) 16.57  
Forfeited (in dollars per share) 48.70  
Outstanding at the end of the period (in dollars per share) 29.60 $ 25.66
Options exercisable (in dollars per share) $ 28.55  
Weighted-Average Remaining Contractual Life    
Outstanding 3 years 7 months 6 days 3 years 4 months 24 days
Options exercisable 3 years 4 months 24 days  
Aggregate Intrinsic Value    
Outstanding (in dollars) $ 19,010 $ 50,590
Options exercisable (in dollars) 18,819  
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Unrecognized stock-based compensation expense related to unvested stock options $ 539  
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  
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 9 months 18 days