Business Combinations - Additional Information (Detail) (USD $)				0 Months Ended						12 Months Ended					0 Months Ended
	Apr. 30, 2014	Nov. 05, 2012	Jun. 12, 2012	Apr. 15, 2014 FeedMagnet	Jun. 12, 2012 PowerReviews	Jun. 12, 2012 PowerReviews Common Stock	Nov. 05, 2012 Longboard Media, Inc	Oct. 31, 2013 Longboard Media, Inc Contingent Consideration Subject to Certain Requirements	Apr. 30, 2013 Longboard Media, Inc Contingent Consideration Subject to Certain Requirements	Apr. 30, 2014 Longboard Media, Inc Selling, General and Administrative Expenses Contingent Consideration Subject to Certain Requirements	Apr. 30, 2014 Longboard Media, Inc Selling, General and Administrative Expenses Scenario, Before Adjustment	Nov. 05, 2012 Longboard Media, Inc Key individuals	Oct. 31, 2013 Longboard Media, Inc Accrued Expenses and Other Current Liabilities Scenario, Before Adjustment	Apr. 30, 2013 Longboard Media, Inc Accrued Expenses and Other Current Liabilities Scenario, Before Adjustment	Nov. 05, 2012 Longboard Media, Inc Common Stock
Business Acquisition [Line Items]
Cash paid in business acquisition				$ 9,329,000	$ 31,059,000		$ 26,855,000
Shares of common Stock issued in business acquisition					6,400,000	6,400,000									500,000
Number of vested and unvested options equivalent to the acquired company's option	6,901,000				1,700,000
Closing price of common stock		$ 12.60	$ 17.20
Contingent consideration acquisition fair value					9,950,000		4,270,000	0	1,500,000			2,000,000	0	3,300,000
Fair value offset to operating expenses										$ (1,000,000)	$ (3,300,000)