Net Income Per Ordinary Share (Tables)

12 Months Ended

Jan. 31, 2016

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:

	Year Ended January 31,
	2016			2015			2014
	(in thousands, except share and per share data)
Numerator:
Net income	$	76,508		$	50,571		$	25,654
Less: amount allocable to unvested early exercised options		—			(11	)		(31	)
Net income allocable to ordinary shareholders - basic	$	76,508		$	50,560		$	25,623
Undistributed earnings reallocated to ordinary shareholders		—			1			2
Net income allocable to ordinary shareholders - diluted	$	76,508		$	50,561		$	25,625
Denominator:
Weighted-average ordinary shares outstanding		31,633,992			29,749,354			27,713,998
Less: weighted-average unvested early exercised options    subject to repurchase		(56	)		(6,701	)		(33,220	)
Weighted-average ordinary shares - basic		31,633,936			29,742,653			27,680,778
Effect of potentially dilutive securities:
Employee stock options		1,245,341			1,818,401			2,034,500
Restricted stock and restricted stock units		865,863			704,788			316,350
Employee stock purchase plan		10,569			12,285			138,461
Warrants to purchase ordinary shares		—			—			2,474
Weighted-average ordinary shares - diluted		33,755,709			32,278,127			30,172,563
Net income per ordinary share:
Basic	$	2.42		$	1.70		$	0.93
Diluted	$	2.27		$	1.57		$	0.85

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:

	Year Ended January 31,
	2016		2015		2014
Options to purchase ordinary shares		109,958		217,514		183,859
Restricted stock  and restricted stock units		163,994		167,702		1,576
Employee stock purchase plan		9,073		36,110		10,597
Early exercised options subject to repurchase		56		6,701		33,220
		283,081		428,027		229,252