Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Stock-based Compensation - Stock Option Transactions (Details)

v3.21.2
Note 11 - Stock-based Compensation - Stock Option Transactions (Details) - $ / shares
shares in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Outstanding, options, beginning of period (in shares) 11,942 5,941
Outstanding, weighted average exercise price (in dollars per share) $ 4.97 $ 2.84
Granted, options (in shares) 4,199 6,352
Granted, weighted average exercise price (in dollars per share) $ 4.04 $ 6.82
Exercised, options (in shares) (67) (215)
Exercised, weighted average exercise price (in dollars per share) $ 2.39 $ 2.49
Forfeited, options (in shares) (1,205) (71)
Forfeited, weighted average exercise price (in dollars per share) $ 5.47 $ 2.87
Outstanding, options, end of period (in shares) 14,869 12,007
Outstanding, weighted average exercise price (in dollars per share) $ 4.68 $ 4.93
Outstanding, weighted average remaining contractual life (Year) 6 years 9 months 18 days 8 years 2 months 12 days
Exercisable, end of the period (in shares) 8,092 4,310
Exercisable, weighted average exercise price (in dollars per share) $ 4.55 $ 2.99
Exercisable, weighted average remaining contractual life (Year) 5 years 6 months 6 years 6 months
Vested and expected to vest, end of period (in shares) 13,851 10,853
Vested and expected to vest, weighted average exercise price (in dollars per share) $ 4.67 $ 4.82
Vested and expected to vest, weighted average remaining contractual life (Year) 6 years 8 months 12 days 8 years 1 month 6 days