NET LOSS PER SHARE

9 Months Ended

Sep. 30, 2020

Net loss per share

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 September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Net loss attributable to common stockholders	$	(17,912)	$	(9,268)	$	(44,628)	$	(25,383)
Weighted average common shares outstanding, basic and diluted	35,927,485		2,065,676		31,860,716		2,054,115
Net loss per share, basic and diluted	$	(0.50)	$	(4.50)	$	(1.42)	$	(12.36)

The Company’s potentially dilutive securities, which include options, unvested restricted stock, convertible preferred stock and warrants to purchase convertible preferred 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:


	Nine Months Ended September 30,
	2020	2019
Options to purchase common stock	3,639,228	1,608,411
Unvested restricted stock	59,334	125,497
Preferred stock (as converted to common stock)	—	15,060,346
Warrants to purchase shares of series A preferred stock (as converted to common stock)	—	10,757
	3,698,562	16,805,011