Purchase Price (Parenthetical) (Detail)	0 Months Ended
Apr. 15, 2014 FeedMagnet Developed Technology	Apr. 15, 2014 FeedMagnet Customer Relationships	Jun. 12, 2012 PowerReviews Developed Technology	Nov. 05, 2012 Longboard Media, Inc Customer Relationships	Jun. 12, 2012 Minimum PowerReviews Customer Relationships	Jun. 12, 2012 Maximum PowerReviews Customer Relationships
Business Acquisition [Line Items]
Useful life	5 years	5 years	3 years	10 years	3 years	10 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

Name:	us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration