Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018, 2017 and 2016, respectively, because to do so would be anti-dilutive (in common equivalent shares):

	Year Ended December 31,
	2018	2017	2016
Common stock warrants	242,779	242,779	242,779
Unvested restricted stock units	147,554	264,361	33,334
Common stock options	5,687,901	3,805,305	2,844,970
Total	6,078,234	4,312,445	3,121,083