Note 8 - Stock-based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member]	9 Months Ended
	Sep. 30, 2024 $ / shares shares
Nonvested (in shares) | shares	840,815	[1]
Nonvested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 9.73
Granted (in shares) | shares	1,384,474	[1]
Granted, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 2.45
Vested (in shares) | shares	(466,974)	[1]
Vested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 9.57
Forfeited (in shares) | shares	(327,813)	[1]
Forfeited, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 4.91
Nonvested (in shares) | shares	1,430,502	[1]
Nonvested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 3.84

[1] The number of shares and grant date fair value per share have been retroactively restated to reflect the one for twelve (1 for 12) reverse stock split, which was effective on March 22, 2024.