Commitments and Contingencies - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	0 Months Ended		3 Months Ended	12 Months Ended		0 Months Ended
	Jun. 04, 2014	Mar. 12, 2013	Jul. 31, 2014	Apr. 30, 2014	Jun. 04, 2014	Jun. 12, 2012 PowerReviews	Jun. 12, 2012 PowerReviews	Jul. 31, 2014 Minimum [Member]	Jul. 31, 2014 Maximum [Member]
Commitments and Contingencies Disclosure [Line Items]
Shares of common Stock issued in business acquisition						6.4
Business acquisition total consideration						$ 150,800,000
Number of vested and unvested options equivalent to the acquired company's option							1.7
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			(10,729,000)
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
Sales tax liability estimate								2,800,000	3,300,000
Sales tax liability accrual			$ 3,100,000