Note 10 - Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2022

Notes Tables

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

	Three Months Ended March 31,
	2022			2021
Numerator
Net loss attributable to common shareholders	$	(4,786	)	$	(3,538	)
Denominator
Weighted average common shares outstanding used to compute net loss per share, basic and diluted		126,624			92,587
Net loss per share of common stock, basic and diluted	$	(0.04	)	$	(0.04	)

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

	Three Months Ended March 31,
	2022		2021
Options to purchase common stock		11,089		7,067
Series B convertible preferred stock		165		177
Warrants to purchase common stock		22,277		25,078
		33,531		32,322