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
Mar. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Warrant liability $ 55 $ 82
Uncertain tax positions 4,146 4,081
Deferred revenue 258 269
Other 104 141
Total other long-term liabilities $ 4,563 $ 4,573