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FAIR VALUE (Details 2) (Purchase Agreement, Aspire Capital Fund, LLC, USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 6 Months Ended
Nov. 14, 2013
Jun. 30, 2014
Dec. 31, 2013
Purchase Agreement | Aspire Capital Fund, LLC
      
Fair value measurements      
Number of shares issued under purchase agreement 511,509    
Purchase price for shares issued under purchase agreement $ 2.0    
Shares committed to purchase 3,042,038    
Period of common stock purchase agreement 2 years    
Fair value of financial instrument 0.5 0.3 0.4
Decrease in the fair value of the Purchase Agreement   $ 0.1