As a result of the Business Combination, the Company has retroactively restated the weighted average shares outstanding prior to February 5, 2021 to give effect to the Conversion Ratio.

The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2021			2020
Net loss attributable to common stockholders	$	(19,048	)	$	(9,746	)
Weighted average common shares outstanding-basic and diluted		32,027,161			14,495,972
Net loss per share attributable to common stockholders-basic and diluted	$	(0.59	)	$	(0.67	)

The Company’s unvested restricted common shares have been excluded from the computation of basic net loss per share attributable to common stockholders.

The Company’s potentially dilutive securities, which include options and unvested restricted stock, have been excluded from the computation of diluted net loss per share attributable to common stockholders as the effect would be to reduce the net loss per share attributable to common stockholders. Therefore, the weighted average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

	Three Months Ended March 31,
	2021		2020
Unvested restricted stock		-		362,282
Options to purchase common stock		5,602,935		1,836,271
Warrants to purchase shares of Series A preferred stock (as converted to common stock)		-		15,257
		5,602,935		2,213,810