Net Loss per Share Attributable to Common Stockholders (Tables)

9 Months Ended

Sep. 30, 2015

Common Equivalent Shares Excluded from Computation of Diluted Net Loss

The following common equivalent shares were excluded from the computation of diluted net loss per share attributable to Common Stockholders for the periods presented because including them would have been anti-dilutive:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Stock options to purchase Common Stock		4,712,354		4,159,895		4,712,354		4,159,895
Common stock warrants		1,500		6,240		1,500		6,240
Restricted stock units		191,773		—		191,773		—
Performance stock units		165,000		—		165,000		—