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Note 8 - Stock-Based Compensation - Summary of Stock Options (Details)
 9 Months Ended
Sep. 30, 2024
$ / shares
shares
Outstanding, options (in shares) | shares 7,342,883
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 6.31
Granted, options (in shares) | shares 1,587,929
Strike price (in dollars per share) | $ / shares $ 2.26
Exercised, options (in shares) | shares (569)
Exercised, weighted average exercise price (in dollars per share) | $ / shares $ 2.5
Canceled and forfeited, options (in shares) | shares (673,653)
Canceled and forfeited, weighted average exercise price (in dollars per share) | $ / shares $ 6.61
Outstanding, options (in shares) | shares 8,256,590
Outstanding, weighted average exercise price (in dollars per share) | $ / shares $ 5.51