Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock Option Activity (Details)

v3.21.2
Stock-based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Share-based compensation      
Number of shares, Outstanding at beginning of period 1,827,906    
Number of shares, Granted 176,429    
Number of shares, Exercised (73,575)    
Number of shares, Forfeited, expired or cancelled (57,115)    
Number of shares, Outstanding at end of period 1,873,645   1,827,906
Number of shares, Exercisable at end of period 1,535,686    
Weighted Average Exercise Price Per Share, Outstanding at beginning of period $ 20.66    
Weighted Average Exercise Price Per Share, Granted 37.62    
Weighted Average Exercise Price Per Share, Exercised 13.35    
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 71.26    
Weighted Average Exercise Price Per Share, Outstanding at end of period 21.00   $ 20.66
Weighted Average Exercise Price Per Share, Exercisable at end of period $ 19.37    
Weighted Average Contractual Term, Outstanding 6 years 2 months 8 days   6 years 3 months 21 days
Weighted Average Contractual Term, Exercisable 5 years 6 months 29 days    
Aggregate Intrinsic Value, Outstanding $ 33,125   $ 51,401
Aggregate Intrinsic Value, Exercisable 30,459    
Options exercised, aggregate intrinsic value $ 1,500 $ 40  
Stock Options      
Share-based compensation      
Weighted-average grant-date fair value (in dollars per share) $ 27.89 $ 16.22  
Unrecognized compensation expense related to stock options (in dollars) $ 4,300    
Weighted average period of unrecognized compensation expense expected to be recognized 1 year 8 months 23 days