Acquired Intangible Assets, Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Jan. 31, 2015
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 15,100
Accumulated Amortization	(1,712)	(3,130)
Net Book Value	13,388	11,970
Customer Relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	11,835	11,835
Accumulated Amortization	(1,684)	(2,612)
Acquired finite-lived intangible assets, net book value	10,151	9,223
Developed Technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	3,265	3,265
Accumulated Amortization	(28)	(518)
Acquired finite-lived intangible assets, net book value	3,237	2,747
Discontinued Operations
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	46,166
Accumulated Amortization	(10,853)
Impairment	(2,500)
Net Book Value	32,813	0
Discontinued Operations | Domain name
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired indefinite lived intangible assets	800
Discontinued Operations | Customer Relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	39,966
Accumulated Amortization	(7,463)
Impairment	(2,354)
Acquired finite-lived intangible assets, net book value	30,149
Discontinued Operations | Developed Technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	5,400
Accumulated Amortization	(3,390)
Impairment	(146)
Acquired finite-lived intangible assets, net book value	$ 1,864