Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Schedule of common stock equivalents excluded from the calculation of diluted net loss per share

The following common stock equivalents were excluded from the calculation of diluted net loss per share applicable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

	As of March 31,
	2019		2018
Stock options		4,616,395		3,753,025
Unvested restricted stock		1,078,824		—
Total		5,695,219		3,753,025