Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2021

Earnings Per Share [Abstract]

Schedule of Potentially Common Shares Excluded from Calculation of Net Loss Per share

The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of the diluted net loss per share attributable to common stockholders for the period indicated because including them would have had an anti-dilutive effect.

	As of  September 30,
	2021		2020
Unvested restricted common stock awards		312,033		624,852
Outstanding options to purchase common stock		4,537,618		3,399,954
Potential shares issuable under the ESPP		—		—