Note 10 - Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Three Months Ended						Six Months Ended
	June 30,						June 30,
	2022			2021			2022			2021
Weighted average common shares outstanding:
Basic		126,314			118,382			123,835			118,322
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants		—			—			—			—
Diluted		126,314			118,382			123,835			118,322
Basic and diluted net loss per share attributable to common stockholders	$	(0.13	)	$	(0.13	)	$	(0.27	)	$	(0.19	)

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

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2022		2021		2022		2021
Unvested stock and stock units (1)		1,981		1,555		1,666		1,034
Convertible preferred stock		41,725		27,129		40,159		16,143
Common Stock Warrants		1,474		2,873		1,463		1,967
IPO Warrants(2)		12,082		12,082		12,082		12,082
Total potentially dilutive common shares		57,262		43,639		55,370		31,226