Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Stock Option Activity (Details)

v3.20.4
Share-Based Compensation - Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of Shares (in thousands)              
Beginning balance (in shares) 7,822 7,591 4,864        
Granted (in shares) 7,568 2,520 3,003        
Granted inducement (in shares) 925 1,600          
Exercised/released (in shares) (1,593) (3,578) (276)        
Cancelled/forfeited (in shares) (236) (311)          
Ending balance (in shares) 14,486 7,822 7,591        
Vested and expected to vest at end of period (in shares)       3,246      
Exercisable - Options at end of period (in shares)       5,063      
Weighted-Average Exercise Price              
Beginning balance (in usd per share) $ 11,350 $ 5.47 $ 4.44 $ 11,350 $ 5.47 $ 4.44 $ 3.87
Granted (in usd per share) 15,610 6.00 5.29        
Granted inducements (in usd per share) 14,360 6.28          
Exercised/released (in usd per share) 4,390 4.03 3.53        
Cancelled/forfeited (in usd per share) 11,820 5.40          
Ending balance (in usd per share) $ 11,350 $ 5.47 $ 4.44        
Vested and expected to vest at end of period (in usd per share)       8.03      
Exercisable - Options at end of period (in usd per share)       $ 6.94      
Weighted-Average Remaining Contractual Life (Years) 7 years 6 months 3 days 6 years 7 months 20 days 4 years 2 months 1 day        
Aggregate Intrinsic Value       $ 35,891 $ 115,655 $ 18,076