Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Note 10 - Stock-based Compensation - Stock Option Transactions (Details)
shares in Thousands
3 Months Ended
Mar. 31, 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 1,414
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 1.91
Forfeited, options (in shares) | shares (119)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 2.67
Outstanding, options (in shares) | shares 5,784
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 2.86
Outstanding, weighted average remaining contractual life (Year) 8 years 36 days
Exercisable, end of the period, options (in shares) | shares 3,237
Exercisable, end of the Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 3.33
Exercisable, weighted average remaining contractual life (Year) 7 years 73 days
Vested and expected to vest, end of period, options (in shares) | shares 5,400
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares $ 2.90
Vested and expected to vest, weighted average remaining contractual life (Year) 8 years