Note 9 - Stock-Based Compensation - Summary of Restricted Stock Awards (Details) - Restricted Stock [Member] shares in Thousands	6 Months Ended
	Jun. 30, 2025 $ / shares shares
Restricted Stock, Unvested, Shares (in shares) | shares	1,541
Restricted Stock, Unvested, Weighted Average Grant Date Share Value (in dollars per share) | $ / shares	$ 2.84
Restricted Stock, Granted (in shares) | shares	589
Restricted Stock, Granted, Weighted Average Grant Date Share Value (in dollars per share) | $ / shares	$ 1.52
Restricted Stock, Vested (in shares) | shares	(198)
Restricted Stock, Vested, Weighted Average Grant Date Share Value (in dollars per share) | $ / shares	$ 3.94
Restricted Stock, Forfeited (in shares) | shares	(20)
Restricted Stock, Forfeited, Weighted Average Grant Date Share Value (in dollars per share) | $ / shares	$ 2.81
Restricted Stock, Unvested, Shares (in shares) | shares	1,912
Restricted Stock, Unvested, Weighted Average Grant Date Share Value (in dollars per share) | $ / shares	$ 2.32