v3.26.1
Note 10 - Stockholders' Equity - Stock Option Activity (Details) - The 2011 and 2017 Plans [Member]
$ / shares in Units, $ in Thousands
 6 Months Ended
Jun. 30, 2026
USD ($)
$ / shares
shares
Balance, shares (in shares) | shares 3,217,289
Balance, weighted average exercise price (in dollars per share) | $ / shares $ 16.13
Granted, shares (in shares) | shares 364,336
Granted, weighted average exercise price (in dollars per share) | $ / shares $ 6.68
Expired, shares (in shares) | shares (118,292)
Expired, weighted average exercise price (in dollars per share) | $ / shares $ (34.57)
Balance, shares (in shares) | shares 3,463,333
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 14.51
Outstanding, weighted average remaining contractual term (Year) 5 years 7 months 6 days
Outstanding, aggregate intrinsic value | $ $ 7,535
Vested and expected to vest, shares (in shares) | shares 3,463,333
Vested and expected to vest, weighted average exercise price (in dollars per share) | $ / shares $ 14.51
Vested and expected to vest, weighted average remaining contractual term (Year) 5 years 7 months 6 days
Vested and expected to vest, aggregate intrinsic value | $ $ 7,535
Exercisable, shares (in shares) | shares 2,885,850
Exercisable, weighted average exercise price (in dollars per share) | $ / shares $ 16.37
Exercisable, weighted average remaining contractual term (Year) 4 years 9 months 18 days
Exercisable, aggregate intrinsic value | $ $ 5,878