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Marketable Securities (Tables)
3 Months Ended
Mar. 31, 2013
Marketable Securities [Abstract]  
Available-for-sale marketable securities
The following is a summary of the Company's available-for-sale marketable securities at March 31, 2013 and December 31, 2012:

         
Unrealized
 
   
Adjusted
  
Fair
  
Holding
 
March 31, 2013
 
Cost
  
Value
  
Gain(Loss)
 
           
Corporate Bonds
 $260,000  $261,000  $1,000 
 
            
December 31, 2012
            
              
Corporate Bonds
 $257,000  $251,000  $(6,000)