Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2022

Accounting Policies [Abstract]

Schedule of Weighted Average Number of Shares

The following table presents the calculation of weighted average shares used to calculate basic and diluted loss per share (in thousands, except share and per share amounts):

	Three Months Ended June 30,						Six Months Ended June 30,
	2022			2021			2022			2021
Basic net loss per common share:
Net loss attributable to common shares - basic	$	(2,344	)	$	(31,746	)	$	(6,549	)	$	(35,776	)
Weighted average shares used in calculating basic loss per share		20,294,652			8,831,517			18,281,788			5,803,010
Basic net loss per common share	$	(0.12	)	$	(3.59	)	$	(0.36	)	$	(6.17	)
Diluted net loss per common share:
Net loss	$	(2,344	)	$	(31,746	)	$	(6,549	)	$	(35,776	)
Change in fair value of warrants		—			(5,119	)		—			(5,119	)
Net loss attributable to common shares - diluted	$	(2,344	)	$	(36,865	)	$	(6,549	)	$	(40,895	)
Weighted-average shares outstanding		20,294,652			8,831,517			18,281,788			5,803,010
Effect of potentially dilutive securities		—			152,681			—			76,341
Weighted average shares used in calculating diluted loss per share		20,294,652			8,984,198			18,281,788			5,879,351
Diluted net loss per common share	$	(0.12	)	$	(4.10	)	$	(0.36	)	$	(6.96	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following potentially dilutive securities were excluded from the calculation of diluted net loss per share because their effects would be anti-dilutive:

	June 30,
	2022		2021
Stock options		2,656,455		802,455
Warrants for common stock		9,213,008		851,168
Series A Convertible Preferred Stock		6,479		6,479
Restricted Stock Units Outstanding		—		8,817
Total		11,875,942		1,668,919