Discontinued Operations - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	0 Months Ended	3 Months Ended	12 Months Ended		0 Months Ended		0 Months Ended
	Jun. 04, 2014	Jul. 31, 2014	Apr. 30, 2014	Jun. 04, 2014	Jun. 12, 2012 PowerReviews	Jun. 12, 2012 PowerReviews	Jun. 12, 2012 PowerReviews Common Stock
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business acquisition total consideration					$ 150,800,000
Shares of common Stock issued in business acquisition					6.4		6.4
Number of vested and unvested options equivalent to the acquired company's options						1.7
Proceeds from disposition	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)
Decrease in estimated cash proceeds		500,000
Incremental transaction costs		$ 400,000