Net Loss Per Share Available to Common Stockholders (Tables)

6 Months Ended

Jun. 30, 2015

Calculation of Basic and Diluted Net Loss Per Share

The following table presents the calculation of basic and diluted net loss per share:

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Numerator:
Net loss	$	(12,047	)	$	(6,791	)	$	(21,707	)	$	(15,096	)
Denominator:
Weighted average number of shares, basic and diluted		36,389			33,771			36,028			33,563
Net loss per share available to common stockholders
Basic and diluted net loss per common share available to common stockholders	$	(0.33	)	$	(0.20	)	$	(0.60	)	$	(0.45	)

Potential Common Shares Outstanding

The following table presents the potential shares of common stock outstanding that were excluded from the computation of diluted net loss per share available to common stockholders for the periods presented because including them would have been anti-dilutive:

	Three and Six Months Ended June 30,
	2015		2014
Options to purchase common stock		6,951		6,260
Restricted stock units		1,206		363
Restricted common stock issued		316		630
Common stock subject to repurchase		38		116
		8,511		7,369