Acquired Intangible Asset Net - Additional Information (Detail) (USD $)	3 Months Ended						12 Months Ended		1 Months Ended		1 Months Ended			12 Months Ended
	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Apr. 30, 2014	Apr. 30, 2013	Dec. 31, 2012 Shopzilla Customer Contracts	Dec. 31, 2012 Shopzilla Customer Contracts Holdback Liabilities	Jan. 31, 2014 Customer Relationships Shopzilla Customer Contracts	Mar. 31, 2013 Customer Relationships Shopzilla Customer Contracts	Dec. 31, 2012 Customer Relationships Shopzilla Customer Contracts	Apr. 30, 2014 Discontinued Operations	Apr. 30, 2014 Discontinued Operations Customer Relationships	Apr. 30, 2014 Discontinued Operations Developed Technology
Acquired Intangible Assets Amortization [Line Items]
Impairment of acquired intangible assets							$ 2,500,000							$ 2,500,000	$ 2,354,000	$ 146,000
Purchase of customer contracts, purchase price											30,000	200,000	4,700,000
Purchase of customer contracts, cash remitted									4,200,000
Accrued expenses and other current liabilities	27,071,000				29,959,000		27,071,000	29,959,000		500,000
Purchase of customer contracts, remaining useful life of acquired contractual customer relationships													10 years
Amortization of acquired intangible assets	$ 288,000	$ 282,000	$ 283,000	$ 282,000	$ 282,000	$ 267,000	$ 1,135,000	$ 549,000