Income Taxes - Summary of Changes in Deferred Tax Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Deferred tax valuation allowance, Beginning Balance	$ 2,574	$ 2,686	$ 2,193
Additions	30	74	1,439
Deductions	(356)	(139)	(70)
Change in tax legislation			(954)
Translation adjustments	26	(47)	78
Deferred tax valuation allowance, Ending Balance	$ 2,274	$ 2,574	$ 2,686