Acquired Intangible Assets, Net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 11,300
Accumulated Amortization	(1,712)	(549)
Impairment	(2,500)
Net Book Value	13,388	10,751
Customer Relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	11,835	11,300
Accumulated Amortization	(1,684)	(549)
Acquired finite-lived intangible assets, net book value	10,151	10,751
Developed Technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	3,265
Accumulated Amortization	(28)
Acquired finite-lived intangible assets, net book value	3,237
Discontinued Operations
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	46,166	46,138
Accumulated Amortization	(10,853)	(4,965)
Impairment	(2,500)
Net Book Value	32,813	41,173
Discontinued Operations | Customer Relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	39,966	39,938
Accumulated Amortization	(7,463)	(3,375)
Impairment	(2,354)
Acquired finite-lived intangible assets, net book value	30,149	36,563
Discontinued Operations | Developed Technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	5,400	5,400
Accumulated Amortization	(3,390)	(1,590)
Impairment	(146)
Acquired finite-lived intangible assets, net book value	1,864	3,810
Discontinued Operations | Domain name
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired indefinite lived intangible assets	$ 800	$ 800