10. Net loss per share

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


	Year Ended March 31,
	2020		2019		2018
Numerator:
Net loss attributable to common stockholders	$	(52,625)	$	(30,834)	$	(19,702)
Denominator:
Weighted average common shares outstanding, basic and diluted		34,261,548		23,198,400		4,978,539
Net loss per share attributable to common stockholders, basic and diluted	$	(1.54)	$	(1.33)	$	(3.96)

Included within weighted average common shares outstanding are common shares issuable upon the exercise of the pre-funded warrants as the warrants are exercisable at any time for nominal consideration, and as such, the shares are considered outstanding for the purpose of calculating basic and diluted net loss per share attributable to common stockholders.

The Company’s potentially dilutive securities, which include stock options, preferred stock and warrants to purchase shares of series seed preferred stock, 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:


	Year Ended March 31,
	2020	2019	2018
Options to purchase common stock	4,964,381	3,721,784	2,520,247
Convertible preferred stock (as converted to common stock)	—	—	19,157,360
Warrants to purchase convertible preferred stock (as converted to common stock)	497,344	497,344	497,344
	5,461,725	4,219,128	22,174,951