Net Income per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Apr. 30, 2016

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 April 30,
	2016						2015
	Class A			Class B			Class A			Class B
Basic
Numerator
Net income	$	8,404		$	4,105		$	6,837		$	6,145
Undistributed earnings allocated to participating securities		(3	)		(1	)		(9	)		(9	)
Net income attributable to common stockholders, basic	$	8,401		$	4,104		$	6,828		$	6,136
Denominator
Weighted average shares used in computing net income per    share attributable to common stockholders, basic		90,020			43,976			69,078			62,085
Net income per share attributable to common stockholders, basic	$	0.09		$	0.09		$	0.10		$	0.10
Diluted
Numerator
Net income attributable to common stockholders, basic	$	8,401		$	4,104		$	6,828		$	6,136
Reallocation as a result of conversion of Class B to Class A    common stock:
Net income attributable to common stockholders, basic		4,104			—			6,136			—
Reallocation of net income to Class B common stock		—			675			—			640
Net income attributable to common stockholders, diluted	$	12,505		$	4,779		$	12,964		$	6,776
Denominator
Number of shares used for basic EPS computation		90,020			43,976			69,078			62,085
Conversion of Class B to Class A common stock		43,976			—			62,085			—
Effect of potentially dilutive common shares		11,712			11,712			13,571			13,571
Weighted average shares used in computing net income per    share attributable to common stockholders, diluted		145,708			55,688			144,734			75,656
Net income per share attributable to common stockholders,    diluted	$	0.09		$	0.09		$	0.09		$	0.09

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 April 30,
	2016		2015
Options and awards to purchase shares not included in the computation of diluted net    income per share because their inclusion would be anti-dilutive		1,489,703		643,638