Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Summary of Significant Accounting Policies

Schedule of outstanding potentially dilutive securities excluded from calculation of diluted net loss per share

The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share for the years ended December 31, 2019, 2018 and 2017, respectively, because to do so would be anti-dilutive (in common equivalent shares):

	Year Ended December 31,
	2019	2018	2017
Common stock warrants	180,274	242,779	242,779
Unvested restricted stock units	—	147,554	264,361
Common stock options	7,192,357	5,687,901	3,805,305
Total	7,372,631	6,078,234	4,312,445