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STOCKHOLDERS' EQUITY (Note Conversion Warrants) (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended
Mar. 31, 2020
Jul. 31, 2017
Mar. 31, 2020
Mar. 31, 2019
Feb. 29, 2020
Aug. 31, 2017
Class of Stock [Line Items]            
Conversion of debt into stock     $ 325 $ 2,933    
Underlying shares (in shares) 907,601   907,601      
Deemed dividend     $ 0      
Note Conversion Warrants            
Class of Stock [Line Items]            
Exercise price (in dollars per share) $ 0.40   $ 0.40   $ 2.25  
Note Conversion Warrants | Deemed Dividend C            
Class of Stock [Line Items]            
Deemed dividend $ 5          
2018 Inducement Agreement            
Class of Stock [Line Items]            
Deemed dividend       $ 3,344    
Common Stock | Note Conversion Warrants            
Class of Stock [Line Items]            
Conversion of convertible notes into common stock (in shares)   23,999        
Exercise price (in dollars per share)           $ 45.00