As noted above, for periods in which the Company reports a net loss attributable to common stockholders, potentially dilutive securities have been excluded from the computation of diluted net loss per share as their effects would be anti-dilutive. 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 period end, from the computation of diluted net loss per share attributable to common stockholders because including them would have had an anti-dilutive effect:


	As of December 31,
	2023		2022		2021
Unvested restricted stock		2,927,152		1,692,819		1,126,206
Outstanding options to purchase common stock		8,276,033		7,548,392		6,034,192
ESPP		73,415		45,906		19,379
Total		11,276,600		9,287,117		7,179,777

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):


	Years Ended December 31,
	2023			2022			2021
Numerator:
Net loss	$	(132,527	)	$	(289,088	)	$	(370,638	)
Denominator:
Weighted average common shares outstanding, basic and diluted		77,151,771			70,015,305			64,227,676
Net loss per common share, basic and diluted	$	(1.72	)	$	(4.13	)	$	(5.77	)