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ACCRUED EXPENSES & WARRANT LIABILITY - Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Payables and Accruals [Abstract]    
Legal - Litigation / Licensing $ 760 $ 0
Compensation 218 1,233
Other 5 70
Total $ 983 $ 1,303