Acquired Intangible Assets Net (Detail) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013	Apr. 30, 2013
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 57,438	$ 57,438
Accumulated Amortization	(7,268)	(5,514)
Net Book Value	50,170	51,924
Domain name
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired indefinite lived intangible assets	800	800
Customer Relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	51,238	51,238
Accumulated Amortization	(5,228)	(3,924)
Net Book Value	46,010	47,314
Developed Technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	5,400	5,400
Accumulated Amortization	(2,040)	(1,590)
Net Book Value	$ 3,360	$ 3,810