Net Income Per Ordinary Share (Tables)

6 Months Ended

Jul. 31, 2013

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Ordinary Share

The following table sets forth the computation of basic and diluted net income per ordinary share for the periods indicated:

	Three Months Ended July 31,						Six Months Ended July 31,
	2013			2012			2013			2012
	(in thousands, except share and per share data)
Numerator:
Net income	$	6,254		$	5,226		$	10,995		$	7,828
Less: amount allocable to preference shareholders		—			(3,689	)		—			(5,719	)
Less: amount allocable to unvested early exercised options		(8	)		(15	)		(17	)		(26	)
Net income allocable to ordinary shareholders - basic	$	6,246		$	1,522		$	10,978		$	2,083
Undistributed earnings reallocated to ordinary shareholders		1			179			1			248
Net income allocable to ordinary shareholders - diluted	$	6,247		$	1,701		$	10,979		$	2,331
Denominator:
Weighted-average ordinary shares outstanding		27,443,622			7,679,674			27,273,376			7,651,418
Less: weighted-average unvested early exercised options subject to repurchase		(34,279	)		(75,231	)		(41,234	)		(94,073	)
Weighted-average ordinary shares - basic		27,409,343			7,604,443			27,232,142			7,557,345
Effect of potentially dilutive securities:
Employee stock options		2,046,623			1,510,484			1,867,695			1,511,417
Restricted stock units		159,434			—			150,541			—
Employee stock purchase plan		231,278			—			201,048			—
Warrants to purchase ordinary shares		1,998			—			4,948			—
Weighted-average ordinary shares - diluted		29,848,676			9,114,927			29,456,374			9,068,762
Net income per ordinary share:
Basic	$	0.23		$	0.20		$	0.40		$	0.28
Diluted	$	0.21		$	0.19		$	0.37		$	0.26

Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Net Income Per Ordinary Share

The following weighted-average potentially dilutive securities were excluded from the computation of diluted net income per ordinary share as their effect would have been antidilutive:

	Three Months Ended July 31,				Six Months Ended July 31,
	2013		2012		2013		2012
Options to purchase ordinary shares		102,707		2,075,968		246,817		2,061,455
Restricted stock units		—		—		3,151		—
Early exercised options subject to repurchase		34,279		75,231		41,234		94,073
Redeemable convertible preference shares (if-converted basis)		—		13,315,727		—		13,315,727
Warrants to purchase redeemable convertible preference shares (if-converted basis)		—		36,292		—		36,292
		136,986		15,503,218		291,202		15,507,547