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FAIR VALUE (Narratives) (Details)
 1 Months Ended 12 Months Ended
Jan. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Y
shares
Dec. 31, 2019
USD ($)
Y
Bridge Notes Redemption Feature [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liabilities written off     $ 400,000
Conversion Option [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative liabilities written off     $ 100,000
2016 Warrant Liability [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Warrants outstanding (in shares) | shares   357  
(Decrease) in warrant liability   $ (400,000)  
Warrants canceled in settlement agreement | shares   1,347  
Settlement of warrant liability $ 100,000    
Warrants and rights outstanding   $ 0  
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   135  
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   0.08  
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     140
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     1.59
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     1
Minimum | Measurement Input, Price Volatility [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Warrants and Rights Outstanding, Measurement Input     141
Minimum | 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     1.58
Minimum | Measurement Input, Expected Term [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Expected term     2 years 3 months 18 days
Minimum | April 2019 Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Warrants and Rights Outstanding, Measurement Input | Y   1.3  
Minimum | April 2019 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   162  
Minimum | April 2019 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   0.10  
Maximum | 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 | 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     1.65
Maximum | Measurement Input, Expected Term [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Expected term     4 years 4 months 24 days
Maximum | 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  
Maximum | April 2019 Warrants      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Warrants and Rights Outstanding, Measurement Input | Y   3.4  
Maximum | April 2019 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   201  
Maximum | April 2019 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   0.17