Note 9 - Stock-based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member]	3 Months Ended
	Mar. 31, 2026 $ / shares shares
Nonvested (in shares) | shares	1,338,100
Nonvested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 1.8
Granted (in shares) | shares	823,180
Granted, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 0.75
Vested (in shares) | shares	(426,286)
Vested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 1.64
Forfeited (in shares) | shares	(31,316)
Forfeited, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 2.19
Nonvested (in shares) | shares	1,703,678
Nonvested, weighted average grant-date fair value (in dollars per share) | $ / shares	$ 1.33