Income Taxes - Summary of Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Tax Assets, Net of Valuation Allowance [Abstract]
Balance at beginning of year	$ 2,658	$ 1,534	$ 1,209
Increase in valuation allowance	4,818	1,292	864
Reversal of valuation allowance			(379)
Effect of foreign currency translation	(10)	(168)	(160)
Balance at end of year	$ 7,466	$ 2,658	$ 1,534