The numerators and denominators of the basic and diluted EPS computations for our common stock are calculated as follows (in thousands, except per share data):


	Three Months Ended October 31, 2013						Three Months Ended October 31, 2012					Nine Months Ended October 31, 2013						Nine Months Ended October 31, 2012
	Class A			Class B			Class A		Class B			Class A			Class B			Class A		Class B
Basic
Numerator
Net income	$	328		$	6,197		$	—	$	5,749		$	365		$	17,003		$	—	$	13,099
Noncumulative dividends on convertible preferred stock		(6	)		(119	)		—		(140	)		(8	)		(396	)		—		(420	)
Undistributed earnings allocated to participating securities		(204	)		(3,857	)		—		(4,547	)		(260	)		(12,091	)		—		(10,348	)

Net income attributable to common stockholders, basic	$	118		$	2,221		$	—	$	1,062		$	97		$	4,516		$	—	$	2,331

Denominator
Weighted-average shares used in computing net income per share attributable to common stockholders, basic		1,800			34,002			—		20,743			600			27,919			—		19,834

Net income per share attributable to common stockholders, basic	$	0.07		$	0.07		$	—	$	0.05		$	0.16		$	0.16		$	—	$	0.12


Diluted
Numerator
Net income attributable to common stockholders, basic	$	118		$	2,221		$	—	$	1,062		$	97		$	4,516		$	—	$	2,331
Add back of:
Noncumulative dividends on convertible preferred stock		6			119			—		—			8			396			—		—
Undistributed earnings allocated to participating securities		204			3,857			—		—			260			12,091			—		—
Reallocation as a result of conversion of Class B to Class A common stock:
Net income attributable to common stockholders, basic		2,221			—			—		—			4,516			—			—		—
Noncumulative dividends on convertible preferred stock		119			—			—		—			396			—			—		—
Undistributed earnings allocated to participating securities		3,857			—			—		—			12,091			—			—		—
Undistributed earnings allocated to participating securities		(138	)		(138	)		—		—			(431	)		(431	)		—		—

Net income attributable to common stockholders, diluted	$	6,387		$	6,059		$	—	$	1,062		$	16,937		$	16,572		$	—	$	2,331

Denominator
Number of shares used for basic EPS computation		1,800			34,002			—		20,743			600			27,919			—		19,834
Conversion of Class B to Class A common stock		34,002			—			—		—			27,919			—			—		—
Effect of potentially dilutive securities		19,639			19,639			—		9,626			18,939			18,939			—		9,326
Effect of conversion of preferred stock upon IPO		76,522			76,522			—		—			82,143			82,143			—		—

Weighted average shares used in computing net income per share attributable to common stockholders, diluted		131,963			130,163			—		30,369			129,601			129,001			—		29,160

Net income per share attributable to common stockholders, diluted	$	0.05		$	0.05		$	—	$	0.03		$	0.13		$	0.13		$	—	$	0.08