Net Loss Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Common Stock Issuable Upon the Conversion or Exercise of Dilutive Securities Excluded from Diluted Net Loss Per Share Attributable to Common Stockholders

The common stock equivalents issuable upon the conversion or exercise of the following dilutive securities has been excluded from the computation of diluted net loss per share attributable to common stockholders calculation because their effect would have been antidilutive for the periods presented:

	September 30,
	2015	2014
	(unaudited)
Options to purchase common stock	2,307,967	1,820,595
Total outstanding shares of common stock equivalents	2,307,967	1,820,595