Net Income (Loss) Per Share

12 Months Ended

Dec. 31, 2016

Earnings Per Share [Abstract]

Net Income (Loss) Per Share

9. Net Income (Loss) Per Share

Basic and diluted net income (loss) per share is computed by dividing the net income (loss) by the weighted-average number of common shares outstanding during the period. The potential dilutive shares of our common stock resulting from the assumed exercise of outstanding stock options were determined under the treasury stock method. The computation of net income (loss) per share for each period, including the number of weighted-average shares outstanding, is shown on the face of the statements of comprehensive income (loss).

The following table shows the computation of net income (loss) per share for each period, including the number of weighted-average shares outstanding.

	Year ended December 31,
	2016		2015			2014
	(in thousands)
Numerator:
Net income (loss)	$	8,140	$	(6,408	)	$	(31,383	)
Denominator:
Weighted-average shares used to compute basic net income    (loss) per share		110,566		106,883			100,978
Dilutive effect of employee stock options		5,573		—			—
Weighted-average shares used to compute diluted net income    (loss) per share		116,139		106,883			100,978
Net income (loss) per share attributable to common stockholders
Basic and diluted	$	0.07	$	(0.06	)	$	(0.31	)

We have excluded approximately 4,400 weighted average stock options to purchase common stock that were outstanding during the year ended December 31, 2016 from the computation of diluted net income per share because including them would have had an anti-dilutive effect.

We have excluded the impact of all common stock equivalents relating to shares underlying outstanding options and warrants from the calculation of diluted net loss per common share for the years ended December 31, 2015 and 2014 because all such securities are antidilutive.

The following table presents information on securities outstanding as of the end of each period that could potentially dilute the per share data in the future.

	December 31,
	2016		2015		2014
	(in thousands)
Stock options outstanding		17,663		16,195		14,704
Warrants outstanding		—		—		8,044
Total		17,663		16,195		22,748