Annual report pursuant to Section 13 and 15(d)

STOCK BASED COMPENSATION - Option Activity of the Plan (Details)

v3.21.1
STOCK BASED COMPENSATION - Option Activity of the Plan (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Number of shares    
Outstanding at beginning of period (in shares) 18,072  
Granted (in shares) 8,463  
Exercised (in shares) (522)  
Forfeited/expired (in shares) (6,460)  
Outstanding at end of period (in shares) 19,553 18,072
Options vested at end of period (in shares) 10,905  
Options vested or expected to vest at end of period (in shares) 18,818  
Weighted-Average Exercise Price per share    
Outstanding at beginning of period (in dollars per share) $ 2.01  
Granted (in dollars per share) 1.51  
Exercised (in dollars per share) 0.62  
Forfeited/expired (in dollars per share) 2.92  
Outstanding at end of period (in dollars per share) 1.53 $ 2.01
Options vested at end of period (in dollars per share) 1.53  
Options vested or expected to vest at December 31, 2020 $ 1.53  
Weighted-average remaining contractual term (in years) 7 years 9 months 7 years 10 months 2 days
Options vested at December 31, 2020 6 years 6 months 7 days  
Options vested or expected to vest at December 31, 2020 7 years 8 months 8 days  
Aggregate intrinsic value of options outstanding $ 306,408 $ 24,045
Weighted average grant date fair value for options granted $ 3.52 $ 1.78
Aggregate intrinsic value of options exercised $ 1,800 $ 3,400
Options vested (in dollars) 170,868  
Options vested or expected to vest (in dollars) $ 294,824