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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Series D Preferred Stock Derivative Liability $ 6,529 $ 0
Derivative liability related to Hercules Warrants 84 $ 0
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Series D Preferred Stock Derivative Liability 0  
Derivative liability related to Hercules Warrants 0  
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative liability related to Hercules Warrants 0  
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Series D Preferred Stock Derivative Liability 6,529  
Derivative liability related to Hercules Warrants $ 84