Note 14 - Stock Based Compensation - Option Activity (Details)
$ / shares in Units, $ in Thousands |
12 Months Ended |
|
Dec. 31, 2021
USD ($)
$ / shares
shares
|
|---|
| Outstanding (in shares) | shares |
12,813,022
|
| Outstanding (in dollars per share) | $ / shares |
$ 3.20
|
| Granted (in shares) | shares |
2,667,612
|
| Granted, weighted-average exercise price (in dollars per share) | $ / shares |
$ 1.82
|
| Forfeited (in shares) | shares |
(375,432)
|
| Forfeited, weighted-average exercise price (in dollars per share) | $ / shares |
$ 1.79
|
| Expired (in shares) | shares |
(801,749)
|
| Expired, weighted-average exercise price (in dollars per share) | $ / shares |
$ 3.03
|
| Exercised (in shares) | shares |
(19,403)
|
| Exercised, weighted-average exercise price (in dollars per share) | $ / shares |
$ 0.84
|
| Outstanding (in shares) | shares |
14,284,050
|
| Outstanding, weighted-average exercise price (in dollars per share) | $ / shares |
$ 2.99
|
| Outstanding, weighted-average remaining contractual life (Year) |
5 years 9 months 18 days
|
| Outstanding, aggregate intrinsic value | $ |
$ 0
|
| Vested and exercisable options (in shares) | shares |
10,496,744
|
| Vested and exercisable options, weighted-average exercise price (in dollars per share) | $ / shares |
$ 3.42
|
| Vested and exercisable options, weighted-average remaining contractual life (Year) |
4 years 9 months 18 days
|
| Vested and exercisable options, aggregate intrinsic value | $ |
$ 0
|
| Vested and expected to vest (in shares) | shares |
14,284,050
|
| Vested and expected to vest, weighted-average exercise price (in dollars per share) | $ / shares |
$ 2.99
|
| Vested and expected to vest, weighted-average remaining contractual life (Year) |
5 years 9 months 18 days
|
| Vested and expected to vest, aggregate intrinsic value | $ |
$ 0
|