Note 9 - Stock-Based Compensation- Restricted Stock Activity (Details) - Restricted Stock [Member] shares in Thousands	6 Months Ended
	Jun. 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	2,006
Granted, weighted average grant date fair value (in dollars per share) | $ / shares	$ 1.17
Vested, balance (in shares) | shares	(1,005)
Vested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.51
Canceled and forfeited, balance (in shares) | shares	(16)
Canceled and forfeited, weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.28
Unvested, balance (in shares) | shares	1,404
Unvested, weighted average grant date fair value (in dollars per share) | $ / shares	$ 2.19