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Note 9 - Shareholders' Equity - Restricted Stock Activity (Details) - Restricted Stock [Member]
 9 Months Ended
Sep. 30, 2024
$ / shares
shares
Non-vested restricted stock (in shares) | shares 855,236
Non-vested restricted stock, weighted average grant date fair value (in dollars per share) | $ / shares $ 2.63
Granted (in shares) | shares 1,303,000
Granted, weighted average grant date fair value (in dollars per share) | $ / shares $ 0.96
Vested (in shares) | shares (673,041)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares $ 2.12
Modifications (accelerated vesting) (in shares) | shares (20,000)
Modifications (accelerated vesting), weighted average grant date fair value (in dollars per share) | $ / shares $ 1.64
Forfeited (in shares) | shares (117,500)
Forfeited, weighted average grant date fair value (in dollars per share) | $ / shares $ 1.18
Non-vested restricted stock (in shares) | shares 1,347,695
Non-vested restricted stock, weighted average grant date fair value (in dollars per share) | $ / shares $ 1.41