Note 8 - Stock-based Compensation - Summary of RSU Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2025 USD ($) $ / shares shares
Unvested, weighted average fair value	$ 3,144
Granted, aggregate intrinsic value	$ 2
Unvested, balance (in shares) | shares	1,278
Unvested, weighted average price per share (in dollars per share) | $ / shares	$ 2.46
Restricted Stock Units (RSUs) [Member]
Unvested, balance (in shares) | shares	3,766
Unvested, weighted average price per share (in dollars per share) | $ / shares	$ 2.41
Unvested, weighted average fair value	$ 9,076
Granted (in shares) | shares	0
Granted, weighted average price per share (in dollars per share) | $ / shares	$ 0
Granted, aggregate intrinsic value	$ 0
Vested (in shares) | shares	(823)
Vested, weighted average price per share (in dollars per share) | $ / shares	$ 2.48
Vested, weighted average fair value	$ (2,041)
Forfeited or canceled (in shares) | shares	(1,665)
Forfeited or canceled, weighted average price per share (in dollars per share) | $ / shares	$ 2.34
Forfeited, weighted average fair value	$ (3,891)