Acquired Intangible Assets, Capitalized Software Development Costs, and Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]
Capitalized software development costs	$ 184	$ 65	$ 1,090	$ 1,066