

NOTE 12.	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,
	2013			2012			2011
	(in thousands, except per share data)
Numerator:
Net income	$	1,624		$	2,280		$	1,954
Net income attributable to participating securities	(2		)	(1,204		)	(1,518		)
Net income attributable to common stockholders - basic	1,622			1,076			436
Undistributed earnings reallocated to participating securities	—			1,201			1,516
Net income attributable to common stockholders - diluted	$	1,622		$	2,277		$	1,952
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders - basic	31,914			11,891			5,053
Effect of potentially dilutive securities:
Convertible preferred stock	—			13,270			17,590
Common stock options	4,059			3,187			1,537
Warrants	—			—			2
Contingently issuable shares related to an acquisition	—			4			12
Weighted-average shares used in computing net income per share attributable to common stockholders - diluted	35,973			28,352			24,194
Net income per share attributable to common stockholders
Basic	$	0.05		$	0.09		$	0.09
Diluted	$	0.05		$	0.08		$	0.08

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,
	2013	2012	2011
	(in thousands)
Common stock options	952	772	2,758