Note 11 - 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, 2024	Mar. 31, 2023
Net loss	$ (24,417)	$ (25,140)
Shares used to compute net loss per share - basic and diluted (in shares)	168,811,095	135,213,196
Net loss per share - basic and diluted (in dollars per share)	$ (0.14)	$ (0.19)