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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net loss	$ (14,080)	$ (17,400)	$ (54,963)	$ (65,090)
Shares used to compute net loss per share - basic and diluted (in shares)	227,452,883	152,026,112	193,655,660	145,810,175
Net loss per share - basic and diluted (in dollars per share)	$ (0.06)	$ (0.11)	$ (0.28)	$ (0.45)