Note 9 - Net Loss Per Share of Common Stock (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended
	March 31,
	2023			2022
Net loss	$	(49,956	)	$	(13,057	)
Basic and diluted net loss per share	$	(0.66	)	$	(0.62	)
Weighted-average shares used to compute basic and diluted net loss per share		75,715			21,130

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	Three Months Ended
	March 31,
	2023		2022
Options to purchase common stock		7,234,248		3,677,075
Common stock warrants		50,029,052		4,850,241
Pre-funded warrants to purchase common stock		—		4,545,455