Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Current taxes:
Federal current taxes	$ (24)	$ 104
State and local current taxes	38	39
Foreign current taxes	41	97
Total current taxes	55	240
Deferred taxes:
Foreign deferred taxes	86	230
Total deferred taxes	86	230
Total Income tax expense	$ 141	$ 470