Annual report pursuant to Section 13 and 15(d)

Compensation and Other Benefit Plans - Stock Option Activity (Details)

v3.20.1
Compensation and Other Benefit Plans - Stock Option Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based compensation    
Number of shares, Outstanding at beginning of period 1,624,746  
Number of shares, Granted 438,814  
Number of shares, Exercised (55,759)  
Number of shares, Forfeited, expired or cancelled (168,178)  
Number of shares, Outstanding at end of period 1,839,623 1,624,746
Number of shares, Exercisable at end of period 1,471,669  
Weighted Average Exercise Price Per Share, Outstanding at beginning of period $ 23.09  
Weighted Average Exercise Price Per Share, Granted 14.84  
Weighted Average Exercise Price Per Share, Exercised 4.90  
Weighted Average Exercise Price Per Share, Forfeited, expired or cancelled 36.78  
Weighted Average Exercise Price Per Share, Outstanding at end of period 20.42 $ 23.09
Weighted Average Exercise Price Per Share, Exercisable at end of period $ 21.60  
Weighted Average Contractual Term, Outstanding 6 years 10 months 17 days 7 years 6 months
Weighted Average Contractual Term, Exercisable 6 years 4 months 13 days  
Aggregate Intrinsic Value, Outstanding $ 26,829 $ 8,104
Aggregate Intrinsic Value, Exercisable 22,569  
Options exercised, aggregate intrinsic value $ 700 $ 1,100
Weighted-average grant-date fair value (in dollars per share) $ 11.72 $ 18.25
Unrecognized compensation expense related to stock options (in dollars) $ 3,500  
Stock Options    
Share-based compensation    
Weighted average period of unrecognized compensation expense expected to be recognized 1 year 10 months 13 days