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

9 Months Ended

Sep. 30, 2022

Notes Tables

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

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2022			2021			2022			2021
Net loss	$	(15,663	)	$	(11,086	)	$	(47,197	)	$	(26,195	)
Basic and diluted net loss per share	$	(0.51	)	$	(0.53	)	$	(1.72	)	$	(1.33	)
Weighted-average shares used to compute basic and diluted net loss per share		30,518			20,763			27,419			19,758

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

	Nine Months Ended
	September 30,
	2022		2021
Options to purchase common stock		4,609,015		2,433,675
Common stock warrants		4,850,241		—