Annual report pursuant to Section 13 and 15(d)

Accrued Expenses and Other Long-Term Liabilities - Schedule of Other Long Term Liabilities (Details)

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Accrued Expenses and Other Long-Term Liabilities - Schedule of Other Long Term Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Warrant liability $ 473
Uncertain tax positions 3,734 3,594
DOJ settlement 250
Other 82
Long-term liabilities $ 4,289 $ 3,844