Unaudited Pro forma Adjusted Summary (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jan. 31, 2014		Jan. 31, 2013		Jan. 31, 2014		Jan. 31, 2013
Business Acquisition [Line Items]
Pro forma adjusted total revenue	$ 47,997	[1]	$ 42,764	[1]	$ 138,106	[1]	$ 120,490	[1]

[1] The three and nine months ended January 31, 2014 reflect the actual results of operations for PowerReviews and Longboard Media.