11. Net Loss per Share

Basic net loss per share of common stock is computed by dividing the Company’s net loss attributable to its stockholders by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share of common stock is computed by giving effect to all potentially dilutive securities, including stock options, warrants and convertible preferred stock. Basic and diluted net loss per share of common stock attributable to the Company’s stockholders was the same for all periods presented on the Consolidated Statements of Comprehensive Loss, as the inclusion of all potentially dilutive securities outstanding would have been anti dilutive. As such, the numerator and the denominator used in computing both basic and diluted net loss per share are the same for each period presented.

In March 2014, the Company issued the Series F with a BCF (See Note 8) and recorded a deemed dividend relating to the BCF of $14.8 million for 2014. The Series F participates in earnings or losses of the Company. Consequently, net losses were adjusted for the deemed distribution relating to the BCF and losses attributable to Series F stockholders to calculate the net loss attributable to 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	)

For all periods presented, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to our net loss position. 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

In August 2013, all convertible preferred stock converted into common stock in conjunction with the consummation of our IPO. During the nine months ended September 30, 2014, 6,976 warrants were exercised at a weighted average exercise price of $0.17. As of September 30, 2014 and 2013, we had 9,356 and 16,332 warrants outstanding, respectively, that were exercisable into common shares at a weighted average price of $12.02 and $0.17 per share, respectively, at the option of the warrant holder.