Note 9 - Stock-Based Compensation- Restricted Stock Activity (Details) - Restricted Stock [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2025 $ / shares shares
Unvested, balance (in shares) | shares	419
Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 7.85
Granted, balance (in shares) | shares	2,672
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.05
Vested, balance (in shares) | shares	(1,390)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.33
Canceled and forfeited, balance (in shares) | shares	(48)
Canceled and forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.66
Unvested, balance (in shares) | shares	1,653
Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.69