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Accrued Expenses and Other Current Liabilities - Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Vendor-related accruals $ 6,838 $ 540
Accrued wages 1,757 762
Accrued interest 592 402
Accrued income and other taxes 68 43
Accrued expenses $ 9,255 $ 1,747