Net Income Per Share Attributable to Common Stockholders

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Net Income Per Share Attributable to Common Stockholders

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:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
	(in thousands)
Numerator:
Net income	$	1,667		$	452		$	1,105		$	2,605
Net income attributable to participating securities	(1,252		)	(350		)	(841		)	(2,029		)
Net income attributable to common stockholders - basic	415			102			264			576
Undistributed earnings reallocated to participating securities	1,249			349			839			2,026
Net income attributable to common stockholders - diluted	$	1,664		$	451		$	1,103		$	2,602
Denominator:
Weighted-average shares used in computing net income per share attributable to common stockholders - basic	5,843			5,137			5,540			5,002
Effect of potentially dilutive securities:
Convertible preferred stock	17,597			17,597			17,597			17,588
Common stock options	3,105			1,656			2,829			1,604
Warrants	—			—			—			2
Contingently issuable shares related to an acquisition	—			12			6			12
Weighted-average shares used in computing net income per share attributable to common stockholders - diluted	26,545			24,402			25,972			24,208
Net income per share attributable to common stockholders
Basic	$	0.07		$	0.02		$	0.05		$	0.12
Diluted	$	0.06		$	0.02		$	0.04		$	0.11

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

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2012	2011	2012	2011
	(in thousands)
Common stock options	1,108	2,806	1,031	2,828