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Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Accounts payable $ 5,313 $ 3,241
Deferred rent 358 388
Accrued interest 260 256
Accrued exit fee for note payable 800 800
Total accounts payable and accrued expenses 6,731 4,685
Less: Current portion (5,931) (3,885)
Non-current total accrued expenses $ 800 $ 800