Quarterly report pursuant to Section 13 or 15(d)

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

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Accrued Expenses and Long-Term Liabilities - Schedule of Long Term Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Warrant liability $ 407 $ 473
Uncertain tax positions 3,838 3,734
Other 94 82
Long-term liabilities $ 4,339 $ 4,289