Income Taxes - Income Tax Benefit (Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current taxes:
Federal current taxes		$ (79)
State and local current taxes	$ 13	(1)
Foreign current taxes		(42)
Total current taxes	13	(122)
Deferred taxes:
Foreign deferred taxes		(27)
Total deferred taxes		(27)
Total Income tax expense (benefit)	$ 13	$ (149)