

NOTE 11.	Net Income Per Share Attributable to Common Stockholders

The computations for basic and diluted net income per share attributable to common stockholders are as follows:



	Year Ended December 31,
	2015		2014		2013
	(in thousands, except per share data)
Numerator:
Net income	$	15,865	$	30,244	$	1,541
Net income attributable to participating securities	—		—		(2		)
Net income attributable to common stockholders - basic	15,865		30,244		1,539
Net income attributable to common stockholders - diluted	$	15,865	$	30,244	$	1,539
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders - basic	34,050		32,979		31,914
Effect of potentially dilutive securities:
Common stock options	4,134		4,191		4,059
Weighted-average shares used in computing net income per share attributable to common stockholders - diluted	38,184		37,170		35,973
Net income per share attributable to common stockholders
Basic	$	0.47	$	0.92	$	0.05
Diluted	$	0.42	$	0.81	$	0.04

Potentially dilutive securities not included in the calculation of diluted net income per share because doing so would be antidilutive are as follows:



	Year Ended December 31,
	2015	2014	2013
	(in thousands)
Common stock options	1,582	1,689	952