Goodwill and Intangible Assets - Schedule of Goodwill (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Balance at December 31, 2016	$ 19,318	[1]
Foreign currency translation adjustments	24
Balance at March 31, 2017	$ 19,342

[1] Derived from our audited consolidated financial statements as of December 31, 2016.