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STOCKHOLDERS' EQUITY (Details 3) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended 0 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 14, 2012
December 2012 stock issuance
Common stock
Aspire Capital Fund, LLC
Jun. 30, 2013
December 2012 stock issuance
Common stock
Aspire Capital Fund, LLC
Dec. 14, 2012
December 2012 stock issuance
Common stock
Maximum
Aspire Capital Fund, LLC
Mar. 22, 2012
March 2012 Sale of Common Stock and Economic Rights
Mar. 22, 2012
March 2012 Sale of Common Stock and Economic Rights
Common stock
Common Stock                  
Number of shares issued under purchase agreement         158,982 650,000      
Purchase price for shares issued under purchase agreement         $ 1.0 $ 3.4      
Additional shares committed for sale under agreement             1,455,787    
Period of common stock purchase agreement         2 years        
Common stock purchase agreement, additional amount committed             19.0    
Stock issued in lieu of commitment fee         74,548        
Net proceeds               $ 2.9  
Shares sold (in shares)                 669,726
Offering price per unit (in dollars per unit)                 $ 4.53
Number of days used to calculate average closing price                 10 days
Amount to be paid as percentage of litigation settlement amount received               10.00%  
Lock-up period from the date of issuance                 1 year
Stock issued upon exercise of warrants (in shares) 0 0 0 0