Income Taxes - Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal	$ (1,475)	$ 550	$ 1,549
State and local	62	51	652
Foreign	4,154	2,256	1,637
Total Current	2,741	2,857	3,838
APIC	0	0	548
Deferred	210	(1,251)	(259)
Total	$ 2,951	$ 1,606	$ 4,127