Note 11 - Net Loss Per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Year Ended
	December 31,
	2022			2021
Weighted average common shares outstanding:
Basic		130,136			119,201
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants		—			—
Diluted		130,136			119,201
Basic and diluted net loss per share attributable to common stockholders	$	(0.65	)	$	(0.34	)

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

	Year Ended
	December 31,
	2022		2021
Unvested stock (1)		1,904		1,662
Convertible preferred stock		46,533		30,754
Common Stock Warrants		1,382		2,207
IPO Warrants(2)		—		12,082
Total potentially dilutive common shares		49,819		46,705