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Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]    
Current Federal
Current State and local
Current Foreign (50)
Current Income Tax Expense (Benefit) (50)
Deferred Federal
Deferred State and local
Deferred Foreign 19 259
Deferred Income Tax Expense (Benefit) 19 259
Total income tax expense $ 19 $ 209