
	Year ended January 31,
	2021		2020		2019
Numerator:
Net loss	$	(27,292)	$	(20,293)	$	(15,062)
Preferred stock dividend paid	—		(14,955)		—
Accretion of redeemable convertible preferred stock to redemption value	—		(56,175)		(30,199)
Net loss attributable to common stockholders	$	(27,292)	$	(91,423)	$	(45,261)
Denominator:
Weighted-average shares of common stock outstanding, basic and diluted	39,519,640		20,301,189		1,844,929
Net loss per share attributable to common stockholders	$	(0.69)	$	(4.50)	$	(24.53)

The Company’s potential dilutive securities, which include stock options, restricted stock units, performance units, outstanding warrants to purchase shares of common stock, convertible preferred stock and warrants to purchase convertible 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 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 January 31,
	2021	2020	2019
Convertible preferred (as converted to common stock)	—	—	25,311,535
Stock options to purchase common stock, restricted stock units and performance stock units	5,406,004	6,963,870	5,055,505
Warrants to purchase convertible preferred stock	—	—	581,798
Warrants to purchase common stock	—	75,137	256,411
Total	5,406,004	7,039,007	31,205,249