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STOCKHOLDERS' EQUITY (Convertible Promissory Note Warrants) (Details) - USD ($)
1 Months Ended 12 Months Ended
Oct. 03, 2017
Nov. 30, 2018
Apr. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Aug. 31, 2017
Jun. 29, 2017
Class of Stock [Line Items]              
Warrants, fair value             $ 211,000
Deemed dividend       $ 4,222,000 $ 12,431,000    
Convertible Promissory Note Warrants              
Class of Stock [Line Items]              
Exercise price (in dollars per share) $ 3.00     $ 1.40      
Class of warrant or right, term 5 years            
Warrants, fair value           $ 15,000  
Deemed dividend         $ 1,000    
2018 Inducement Agreement | Convertible Promissory Note Warrants              
Class of Stock [Line Items]              
Exercise price (in dollars per share)       0.75      
2018 Purchase Agreement | Convertible Promissory Note Warrants              
Class of Stock [Line Items]              
Exercise price (in dollars per share)       $ 1.04      
2018 Note Agreement              
Class of Stock [Line Items]              
Exercise price (in dollars per share)   $ 0.15 $ 0.30        
2018 Note Agreement | Deemed Dividend P              
Class of Stock [Line Items]              
Deemed dividend     $ 1,000        
2018 Note Agreement | Deemed Dividend Q              
Class of Stock [Line Items]              
Deemed dividend   $ 1,000          
Maximum | 2018 Inducement Agreement | Convertible Promissory Note Warrants | Deemed Dividend O              
Class of Stock [Line Items]              
Deemed dividend       $ 1,000      
Maximum | 2018 Purchase Agreement | Convertible Promissory Note Warrants | Deemed Dividend N              
Class of Stock [Line Items]              
Deemed dividend       $ 1,000