Current report filing

Note 8 - Stock-based Compensation - Stock Option Transactions (Details)

v3.19.1
Note 8 - Stock-based Compensation - Stock Option Transactions (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended
Sep. 30, 2018
USD ($)
$ / shares
shares
Outstanding, beginning of period (in shares) | shares 2,344
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 3.46
Granted (in shares) | shares 2,284
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 2.99
Exercised (in shares) | shares (96)
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 2.28
Expired (in shares) | shares (10)
Expired, weighted average exercise price (in dollars per share) | $ / shares $ 4.97
Forfeited (in shares) | shares (51)
Forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 2.34
Outstanding, end of the period (in shares) | shares 4,471
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 3.21
Outstanding, weighted average remaining contractual life (Year) 8 years 36 days
Outstanding, aggregate intrinsic value | $ $ 1,062,944
Exercisable, end of the period (in shares) | shares 2,559
Exercisable, end of the Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 3.54
Exercisable, weighted average remaining contractual life (Year) 7 years 146 days
Exercisable, aggregate intrinsic value | $ $ 533,409
Vested and expected to vest, end of the period (in shares) | shares 4,183
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares $ 3.24
Vested and expected to vest, weighted average remaining contractual life (Year) 8 years
Vested and expected to vest, aggregate intrinsic value | $ $ 983,514