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FAIR VALUE MEASUREMENTS (Tables)
6 Months Ended
Jun. 30, 2013
FAIR VALUE MEASUREMENTS [Abstract]  
Fair value of financial instruments
The following table summarizes the fair value of our financial instruments at June 30, 2013 and December 31, 2012.

Description
 
June 30, 2013
  
December 31, 2012
 
Assets:
      
Notes receivable and accrued interest
 $938,806  $1,302,220 
          
Liabilities:
        
Convertible note – June 2011
 $136,224  $134,154 
Convertible note – July 2011
 $116,952  $113,084 
Convertible note – June 2012
 $1,249,391  $1,593,924