Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Stock Option Activity (Details)

v3.22.0.1
Stock Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based compensation    
Number of shares, Outstanding at beginning of period 1,827,906  
Number of shares, Granted 325,211  
Number of shares, Exercised (77,305)  
Number of shares, Forfeited, expired or cancelled (164,635)  
Number of shares, Outstanding at end of period 1,911,177 1,827,906
Number of shares, Exercisable at end of period 1,553,696  
Weighted Average Exercise Price Per Share, Outstanding at beginning of period $ 20.66  
Weighted Average Exercise Price Per Share, Granted 32.02  
Weighted Average Exercise Price Per Share, Exercised 13.61  
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 46.59  
Weighted Average Exercise Price Per Share, Outstanding at end of period 20.64 $ 20.66
Weighted Average Exercise Price Per Share, Exercisable at end of period $ 18.75  
Weighted Average Contractual Term, Outstanding 6 years 3 months 29 days 6 years 3 months 21 days
Weighted Average Contractual Term, Exercisable 5 years 8 months 8 days  
Aggregate Intrinsic Value, Outstanding $ 15,103 $ 51,401
Aggregate Intrinsic Value, Exercisable 14,894  
Options exercised, aggregate intrinsic value $ 1,600 $ 5,400
Weighted-average grant-date fair value (in dollars per share) $ 22.23 $ 18.41
Unrecognized compensation expense related to stock options (in dollars) $ 4,100  
Stock Options [Member]    
Share-based compensation    
Weighted average period of unrecognized compensation expense expected to be recognized 2 years 2 months 15 days