Net Loss per Share

12 Months Ended

Dec. 31, 2019

13.	Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows:

	Year Ended December 31,
	2019			2018			2017
Basic and Diluted net loss per share attributable to common stockholders:
Numerator:
Net loss	$	(54,789	)	$	(6,597	)	$	(45,377	)
Accretion of redeemable convertible preferred stock to redemption value		—			(11	)		(40	)
Net loss attributable to common stockholders	$	(54,789	)	$	(6,608	)	$	(45,417	)
Denominator:
Weighted average commons shares outstanding—basic and diluted		27,854,912			19,990,773			2,474,800
Net loss per share attributable to common stockholders—basic and diluted	$	(1.97	)	$	(0.33	)	$	(18.35	)

The Company’s potential dilutive securities, which include stock options to purchase common stock and shares issuable upon conversion of the convertible note payable have been excluded from the computation of diluted net loss per share attributable to common stockholders whenever the effect of including them would be to reduce the net loss per share. The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

	Year Ended December 31,
	2019		2018
Outstanding options to purchase common stock		5,418,113		4,414,225
Shares issuable upon conversion of the convertible note payable		2,564,103		—
		7,982,216		4,414,225