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STOCKHOLDERS' EQUITY (Preferred Stock Induced Conversions) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Feb. 12, 2019
Mar. 21, 2018
Mar. 31, 2019
Dec. 31, 2018
Class of Stock [Line Items]          
Preferred stock, shares authorized (in shares) 15,000,000     15,000,000 15,000,000
Preferred stock, par value (in dollars per share) $ 0.01     $ 0.01 $ 0.01
Number of shares converted from debt instrument (in shares)   120,983     93,333
Conversion of convertible debt plus interest into common stock   $ 1,900,000     $ 200,000
Warrants exercised       20,000  
Preferred stock, shares outstanding (in shares) 47     47 47
Preferred stock, shares issued (in shares) 47     47 47
Preferred Stock [Member]          
Class of Stock [Line Items]          
Shares not converted 47        
Preferred Stock [Member] | 2018 Inducement Agreement          
Class of Stock [Line Items]          
Conversion price (in dollars per share)     $ 11.25    
Exercise price (in dollars per share) $ 11.25     $ 11.25 $ 15.60
Warrants, fair value $ 1,200,000     $ 1,200,000  
Convertible Preferred Stock [Member] | Preferred Stock Induced Conversions, First Investor [Member]          
Class of Stock [Line Items]          
Class of Warrant or Right, Warrants or Rights Exercised     44,444    
Convertible Preferred Stock [Member] | Preferred Stock Induced Conversions, Second Investor [Member]          
Class of Stock [Line Items]          
Issuance of warrants in conjunction with issuance of side agreement     $ 33,333