Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Note 10 - Stock-based Compensation - Stock Option Transactions (Details)
shares in Thousands
6 Months Ended
Jun. 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 1,789
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 1.93
Exercised, options (in shares) | shares (23)
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 1.11
Forfeited, options (in shares) | shares (130)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 2.59
Expired, options (in shares) | shares (47)
Expired, weighted average exercise price (in dollars per share) | $ / shares $ 4.23
Outstanding, options (in shares) | shares 6,078
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.83
Outstanding, weighted average remaining contractual life (Year) 8 years
Exercisable, end of the period, options (in shares) | shares 3,257
Exercisable, end of the Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 3.36
Exercisable, weighted average remaining contractual life (Year) 7 years
Vested and expected to vest, end of period, options (in shares) | shares 5,654
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares $ 2.87
Vested and expected to vest, weighted average remaining contractual life (Year) 7 years 328 days