Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Stock-based Compensation - Stock Option Transactions (Details)

v3.19.3
Note 10 - Stock-based Compensation - Stock Option Transactions (Details)
shares in Thousands
9 Months Ended
Sep. 30, 2019
$ / shares
shares
Outstanding, options (in shares) | shares 4,489
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 3.11
Granted, options (in shares) | shares 2,018
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 1.97
Exercised, options (in shares) | shares (34)
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 1.11
Forfeited, options (in shares) | shares (322)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 2.36
Expired, options (in shares) | shares (47)
Expired, weighted average exercise price (in dollars per share) | $ / shares $ 4.33
Outstanding, options (in shares) | shares 6,104
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.81
Outstanding, weighted average remaining contractual life (Year) 7 years 299 days
Exercisable, end of the period, options (in shares) | shares 3,340
Exercisable, end of the Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 3.34
Exercisable, weighted average remaining contractual life (Year) 6 years 299 days
Vested and expected to vest, end of period, options (in shares) | shares 5,689
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares $ 2.86
Vested and expected to vest, weighted average remaining contractual life (Year) 7 years 240 days