Related-Person Transactions - Additional Information (Detail) (Synecor, LLC [Member], USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Related Party Transaction [Line Items]
Payments to Acquire in Process Research and Development	$ 335,000	$ 15,000
Officer [Member] \| Common Stock [Member]
Related Party Transaction [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	9.00%	9.00%

The cash outflows from the purchase of net carrying value allocated to in-process research and development costs and materials acquired in a business combination.

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireInProcessResearchAndDevelopment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration