Note 11 - Net Loss Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Net loss	$ (9,330)	$ (9,270)	$ (8,016)	$ (8,706)	$ (7,987)	$ (10,219)	$ (26,616)	$ (26,912)
Weighted average common shares outstanding (basic and diluted) (in shares)	31,262,997			8,629,683			19,880,145	6,892,910
Weighted average common shares outstanding - Diluted (in shares)	31,262,997			8,629,683			19,880,145	6,892,910
Net loss per common share (basic and diluted) (in dollars per share)	$ (0.3)			$ (1.01)			$ (1.34)	$ (3.9)