Goodwill and Intangible Assets - Schedule of Goodwill (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Balance at December 31, 2014	$ 11,527	[1]
Add: Goodwill from SocialMoov acquisition	7,925
Less: Other adjustments to goodwill	(20)
Balance at September 30, 2015	$ 19,432

[1] Derived from our audited consolidated financial statements as of December 31, 2014.