Net (Loss) Income per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Dec. 31, 2014

Earnings Per Share [Abstract]

Outstanding Shares of Common Stock Equivalents Excluded from Computation of Diluted Net Income Loss

The following outstanding shares of common stock equivalents were excluded from the computation of diluted net (loss) income per share attributable to common stockholders for the periods presented because including them would have been antidilutive:

	Year Ended December 31,
	2014		2013		2012
Convertible preferred stock	–		–			24,026,797
Stock options to purchase common stock		4,249,168		3,708,773		1,653,298
Convertible preferred stock warrants	–		–			81,075
Common stock warrants		6,240		82,575		1,500