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Note 10 - Net Loss Per Share (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*
Weighted average common shares outstanding:
Basic			129,418				119,374				125,716				118,677
Dilutive unvested stock, convertible preferred stock, Common Stock Warrants and IPO Warrants			—				—				—				—
Diluted			129,418				119,374				125,716				118,677

Basic and diluted net loss per share attributable to common stockholders		$	(0.19	)		$	(0.03	)		$	(0.47	)		$	(0.23	)

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

		*Three Months Ended*								*Nine Months Ended*
		*September 30,*								*September 30,*
		*2022*				*2021*				*2022*				*2021*
Unvested stock and stock units ⁽¹⁾			1,918				1,831				1,751				1,581
Convertible preferred stock			47,707				34,095				45,653				29,174
Common Stock Warrants			1,240				2,510				1,388				2,486
IPO Warrants⁽²⁾			—				12,082				—				12,082
Total potentially dilutive common shares			50,865				50,518				48,792				45,323