Note 10 - Net Loss Per Share Attributable to Common Stockholders - Calculation of Basic and Diluted Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net loss	$ (15,591)	$ (24,417)
Shares used to compute net loss per share - basic and diluted (in shares)	227,923,636	168,811,095
Net loss per share - basic and diluted (in dollars per share)	$ (0.07)	$ (0.14)