Income Taxes - Summary of Changes in Deferred Tax Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Deferred tax valuation allowance, Beginning Balance	$ 1,565	$ 2,200	$ 2,086
Additions	150	17	801
Deductions	(134)	(574)	(712)
Translation adjustments	(47)	(78)	25
Deferred tax valuation allowance, Ending Balance	$ 1,534	$ 1,565	$ 2,200