Net Income per Share Attributable to Common Stockholders (Tables)

9 Months Ended

Oct. 31, 2014

Earnings Per Share [Abstract]

Numerators and Denominators of the Basic and Diluted EPS Computations for Common Stock

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,												Nine Months Ended October 31,
	2014						2013						2014						2013
	Class A			Class B			Class A			Class B			Class A			Class B			Class A			Class B
Basic
Numerator
Net income	$	4,358		$	5,900		$	328		$	6,197		$	8,630		$	18,427		$	365		$	17,003
Noncumulative dividends on    convertible preferred stock		—			—			(6	)		(119	)		—			—			(8	)		(396	)
Undistributed earnings allocated to    participating securities		(25	)		(35	)		(204	)		(3,857	)		(66	)		(140	)		(260	)		(12,091	)
Net income attributable to common    stockholders, basic	$	4,333		$	5,865		$	118		$	2,221		$	8,564		$	18,287		$	97		$	4,516
Denominator
Weighted average shares used in    computing net income per share    attributable to common    stockholders, basic		54,897			74,315			1,800			34,002			40,454			86,382			600			27,919
Net income per share attributable to    common stockholders, basic	$	0.08		$	0.08		$	0.07		$	0.07		$	0.21		$	0.21		$	0.16		$	0.16
Diluted
Numerator
Net income attributable to common    stockholders, basic	$	4,333		$	5,865		$	118		$	2,221		$	8,564		$	18,287		$	97		$	4,516
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		5,865			—			2,221			—			18,287			—			4,516			—
Noncumulative dividends on convertible    preferred stock		—			—			119						—			—			396
Undistributed earnings allocated to    participating securities		—			—			3,857						—			—			12,091
Reallocation of net income to Class B    common stock		—			453			(138	)		(138	)		—			1,025			(431	)		(431	)
Net income attributable to common    stockholders, diluted	$	10,198		$	6,318		$	6,387		$	6,059		$	26,851		$	19,312		$	16,937		$	16,572
Denominator
Number of shares used for basic    EPS computation		54,897			74,315			1,800			34,002			40,454			86,382			600			27,919
Conversion of Class B to Class A    common stock		74,315			—			34,002			—			86,382			—			27,919			—
Effect of potentially dilutive    common shares		15,077			15,077			19,639			19,639			17,246			17,246			18,939			18,939
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		144,289			89,392			131,963			130,163			144,082			103,628			129,601			129,001
Net income per share attributable to    common stockholders, diluted	$	0.07		$	0.07		$	0.05		$	0.05		$	0.19		$	0.19		$	0.13		$	0.13

Potential Common Share Equivalents Excluded where the Inclusion would be Anti-dilutive

Potential common share equivalents excluded where the inclusion would be anti-dilutive are as follows:

	Three Months Ended October 31,				Nine Months Ended October 31,
	2014		2013		2014		2013
Options to purchase shares not included in the computation of diluted net income per share because their inclusion would be anti-dilutive		767,413		35,304		332,458		38,714