Income Taxes - Schedule of Reconciliations of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, opening balance	$ 464	$ 240	$ 289
Gross increases – tax positions in prior period	1,526		27
Gross decreases – tax positions in prior period			(41)
Gross increases – current period tax positions	29	261	17
Foreign currency translation	(37)	(13)	5
Lapse of statute of limitations	(24)	(24)	(57)
Unrecognized tax benefits, ending balance	$ 1,958	$ 464	$ 240