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FAIR VALUE MEASUREMENTS, Unobservable Input Reconciliation (Details) - Recurring [Member] - Derivative Warrant Liabilities [Member] - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Changes in level 3 items measured at fair value on a recurring basis [Roll Forward]    
Fair Value as of Beginning of Period $ (1,527) $ (678)
Total Realized and Unrealized Gains (Losses) [1] 808 314
Issuance of New Instruments (7,917) (2,474)
Reclassify to (Deficit) Equity 7,851 0
Conversion to Common Stock 16 0
Fair Value, at End of Period $ (769) $ (2,838)
[1] Included in change in fair value of derivative warrant liabilities in our unaudited condensed consolidated statements of operations.