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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Payables and Accruals [Abstract]    
Accounts payable $ 5,326 $ 5,606
Accrued litigation settlement (see Note 14) 640
Deferred rent 388
Accrued interest 177 256
Accrued exit fee for note payable 800 800
Total accounts payable and accrued expenses 6,943 7,050
Less: Current portion (6,143) (6,250)
Non-current total accrued expenses $ 800 $ 800