Net Income (Loss) Per Share

9 Months Ended

Sep. 30, 2015

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

Net Income (Loss) Per Share

We compute basic net income (loss) per share by dividing net loss by the weighted-average number of common shares outstanding for the period. We compute diluted net income (loss) per share giving effect to all potential dilutive common stock, including awards granted under our equity compensation plans and warrants to acquire common stock.

The following table sets forth the computation of basic and diluted net income (loss):

	For the Three Months Ended September 30,					For the Nine Months Ended September 30,
	2015			2014		2015			2014
	(in thousands, except share and per share data)
Net income (loss)	$	(65,145	)	$	5,450	(73,783		)	(343		)
Denominator (basic):
Weighted average common shares outstanding	95,340,136			92,924,516		94,659,931			92,436,628
Denominator (diluted):
Weighted average common shares outstanding	95,340,136			92,924,516		94,659,931			92,436,628
Dilutive stock options outstanding	—			3,136,115		—			—
Dilutive restricted stock units and awards	—			152,357		—			—
Dilutive shares purchased under ESPP	—			6,115		—			—
Weighted average common shares from warrants	—			2,304,931		—			—
Net weighted average common shares outstanding	95,340,136			98,524,034		94,659,931			92,436,628
Net income (loss) per share:
Basic	$	(0.68	)	$	0.06	$	(0.78	)	$	(0.00	)
Diluted	$	(0.68	)	$	0.06	$	(0.78	)	$	(0.00	)

Potentially dilutive securities, including common equivalent shares in which the exercise price together with other assumed proceeds exceed the average market price of common stock for the applicable period, were not included in the calculation of diluted net income (loss) per share as their impact would be anti-dilutive. The following weighted-average number of outstanding employee stock options, restricted stock units and restricted stock awards, warrants to purchase common stock, and shares purchased under our ESPP were excluded from the computation of diluted net income (loss) per share:

	For the Three Months Ended September 30,		For the Nine Months Ended September 30,
	2015	2014	2015	2014
Stock options outstanding	10,328,593	5,817,422	8,876,984	7,229,252
Restricted stock units and restricted stock awards	2,574,405	489,060	1,888,205	556,606
Common equivalent shares from stock warrants	2,168,299	—	2,210,012	2,340,061
Shares purchased under ESPP	54,271	—	67,858	13,088
	15,125,568	6,306,482	13,043,059	10,139,007