Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended				9 Months Ended	12 Months Ended	0 Months Ended
	Nov. 13, 2014 Term sqft	Sep. 23, 2014	Jun. 04, 2014	Mar. 12, 2013	Jan. 31, 2015	Apr. 30, 2014	Jun. 12, 2012
Commitments and Contingencies Disclosure [Line Items]
Definitive agreement to divest PowerReviews, expected cash proceed			$ 30,000,000		$ 30,000,000
Amount that will be placed into escrow as partial security for the Company's indemnification obligations			4,500,000
Loss on disposal of discontinued operations, net of taxes					10,700,000
Loss on disposal of discontinued operations, net of taxes, previously recognized						(9,192,000)
Loss on disposal of discontinued operations, net of tax, recognized in current period					(1,537,000)
Damages sought in shareholder derivative action				91,400,000
Final hearing of shareholder derivative action, date		Nov. 24, 2014
Sales tax liability accrual					3,100,000
Office space	137,615
Lease commencement date	Jan. 01, 2016
Lease termination period	10 years 6 months
Number of successive periods of five years terms	2
Lease extension period	5 years
Expected lease payments for fiscal year ended April 30, 2016	300,000
Expected lease payments for fiscal year ended April 30, 2017	3,800,000
Expected lease payments for fiscal year ended April 30, 2018	3,800,000
Expected lease payments for fiscal year ended April 30, 2019	3,900,000
Expected lease payments for fiscal year ended April 30, 2020	4,000,000
Expected lease payments for fiscal years ended April 30th thereafter	25,900,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Sales tax liability estimate					2,800,000
Maximum
Commitments and Contingencies Disclosure [Line Items]
Sales tax liability estimate					3,300,000
PowerReviews
Commitments and Contingencies Disclosure [Line Items]
Business acquisition total consideration							$ 150,800,000