Net Loss per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Calculation of Basic and Diluted Net Loss Per Share of Common Stock Attributable to Company's Common Stockholders

The following table presents the calculation of basic and diluted net loss per share of common stock attributable to the Company’s common stockholders (in thousands, except share and per share data):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2014			2013			2014			2013
Net loss per share:
Numerator:
Net loss	$	(21,060	)	$	(11,415	)	$	(58,339	)	$	(20,308	)
Deemed dividend related to the beneficial conversion feature of Series F convertible preferred stock		—			—			(14,840	)		—
Net loss attributable to common stockholders		(21,060	)		(11,415	)		(73,179	)		(20,308	)
Net loss attributable to preferred stockholders		1,183			—			3,329			—
Net loss attributable to common stockholders — basic and diluted		(19,877	)		(11,415	)		(69,850	)		(20,308	)
Denominator:
Weighted average common shares outstanding, basic and diluted		33,609,212			8,005,142			29,664,548			2,828,757
Net loss per share attributable to common stockholders, basic and diluted	$	(0.59	)	$	(1.43	)	$	(2.35	)	$	(7.18	)

Schedule of Anti-Dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share

Securities that may potentially dilute earnings per share in the future that have not been included in the calculation of diluted net loss per share because to do so would be anti-dilutive are as follows (in common equivalent shares):

	Three months ended September 30,				Nine months ended September 30,
	2014		2013		2014		2013
Convertible preferred stock		2,000,000		—		2,000,000		—
Common stock options		4,483,207		2,818,732		4,483,207		2,818,732
Warrants		9,356		16,332		9,356		16,332
Total		6,492,563		2,835,064		6,492,563		2,835,064