Net Loss per Share

9 Months Ended

Sep. 30, 2020

12. Net Loss per Share

Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows (in thousands, except share and per share amounts):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019

Numerator:
Net loss attributable to common stockholders	$	(13,089)	$	(8,210)	$	(36,052)	$	(16,123)
Denominator:
Weighted‑average common shares outstanding, basic and diluted		15,334,241		621,581		11,991,870		586,728
Net loss per share attributable to common stockholders, basic and diluted	$	(0.85)	$	(13.21)	$	(3.01)	$	(27.48)

The Company’s potential dilutive securities have been excluded from the computation of diluted net loss per share as the effect would be to reduce the net loss per share. 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:


	September 30,
	2020	2019

Convertible preferred stock (as converted to common stock)	—	18,969,672
Unvested restricted common stock	176,037	295,360
Stock options to purchase common stock	2,861,128	398,726
	3,037,165	19,663,758