Net loss per share

3 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Net loss per share

10. Net Loss Per Share

The following table sets forth the outstanding potentially dilutive securities that have been excluded in the calculation of diluted net loss per share because to do so would be anti-dilutive (in common stock equivalent shares):

	As of March 31,
	2017	2016
Unvested restricted common stock	997,142	1,626,343
Outstanding stock options	5,481,511	1,614,346
Total	6,478,653	3,240,689