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FAIR VALUE (Narratives) (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 30, 2018
USD ($)
shares
Mar. 31, 2019
USD ($)
Y
shares
Dec. 31, 2018
Y
shares
Sep. 30, 2018
USD ($)
shares
Dec. 31, 2018
USD ($)
Y
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
shares
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Derivative liability from debt discount   $ 400          
Derivative asset (liability)           $ 62 $ 0
Bridge Notes Redemption Feature [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Derivative asset (liability)           30  
Conversion Option [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Derivative asset (liability)           $ 32  
Quarter 3 2018 Bridge Notes              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Derivative liability from debt discount       $ 100      
April 2018 Bridge Notes              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Derivative liabilities $ 300            
Derivative liability from debt discount       $ 100      
2016 Warrant Liability [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants outstanding (in shares) | shares   357         357
(Decrease) in warrant liability   $ (400)     $ (400)    
Warrants canceled in settlement agreement | shares   1,347          
Debt settlement   $ 456          
Measurement Input, Price Volatility [Member] | 2016 Warrant Liability [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   142          
Measurement Input, Risk Free Interest Rate [Member] | 2016 Warrant Liability [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   2.27          
Measurement Input, Expected Term [Member] | 2016 Warrant Liability [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input | Y   1.75          
April 2018 Warrants              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Stock rights issued (in shares) | shares 243,223            
Advisor Warrants              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Stock rights issued (in shares) | shares 15,466            
Quarter 3 2018 Warrants              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Stock rights issued (in shares) | shares       196,337      
Quarter 4 2018 Warrants              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Stock rights issued (in shares) | shares     300,114        
Quarter 4 2018 Warrants | Measurement Input, Price Volatility [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input     176.00   176.00    
Quarter 4 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input     2.48   2.48    
Quarter 4 2018 Warrants | Measurement Input, Expected Term [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input | Y     2   2    
Minimum | April 2018 Warrants | Measurement Input, Price Volatility [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   97          
Minimum | April 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   2.21          
Minimum | April 2018 Warrants | Measurement Input, Expected Term [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input | Y   0.05          
Maximum | April 2018 Warrants | Measurement Input, Price Volatility [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   163          
Maximum | April 2018 Warrants | Measurement Input, Risk Free Interest Rate [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input   2.44          
Maximum | April 2018 Warrants | Measurement Input, Expected Term [Member]              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Warrants and Rights Outstanding, Measurement Input | Y   4.76