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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Carrying value of debt $ 32 $ 9,027
Derivative Warrant Liabilities [Member] | Recurring [Member]    
Fair values by input hierarchy of items measured at fair value on a recurring basis [Abstract]    
Total liabilities at fair value $ 769 $ 1,527
Additional assumptions used to calculate fair value [Abstract]    
Risk-free interest rate 1.20%  
Expected volatility   64.00%
Derivative Warrant Liabilities [Member] | Recurring [Member] | Minimum [Member]    
Additional assumptions used to calculate fair value [Abstract]    
Risk-free interest rate   0.60%
Expected volatility 67.00%  
Derivative Warrant Liabilities [Member] | Recurring [Member] | Maximum [Member]    
Additional assumptions used to calculate fair value [Abstract]    
Risk-free interest rate   1.90%
Expected volatility 72.00%  
Derivative Warrant Liabilities [Member] | Recurring [Member] | Weighted Average [Member]    
Additional assumptions used to calculate fair value [Abstract]    
Risk-free interest rate 1.20% 1.60%
Expected volatility 71.00% 64.00%
Derivative Warrant Liabilities [Member] | Level 1 [Member] | Recurring [Member]    
Fair values by input hierarchy of items measured at fair value on a recurring basis [Abstract]    
Total liabilities at fair value $ 0 $ 0
Derivative Warrant Liabilities [Member] | Level 2 [Member] | Recurring [Member]    
Fair values by input hierarchy of items measured at fair value on a recurring basis [Abstract]    
Total liabilities at fair value 0 0
Derivative Warrant Liabilities [Member] | Level 3 [Member] | Recurring [Member]    
Fair values by input hierarchy of items measured at fair value on a recurring basis [Abstract]    
Total liabilities at fair value $ 769 $ 1,527