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Financial Instruments
 9 Months Ended
Sep. 30, 2013
Investments Debt And Equity Securities [Abstract]  
Financial Instruments

Note 2. Financial Instruments

The following table summarizes the fair value of our cash, cash equivalents and available-for-sale marketable securities held in our current investment portfolio:

 

     Amortized
Cost		      Gross
Unrealized
(Losses)		     Fair Value  

September 30, 2013

        

Cash

    $ 377,695       $ —       $ 377,695   

Cash equivalents

      20,577,598         —         20,577,598   
  

 

 

     

 

 

    

 

 

  

Total cash, cash equivalents, and marketable securities

    $ 20,955,293       $ —       $ 20,955,293   
  

 

 

     

 

 

    

 

 

  

December 31, 2012

        

Cash

    $ 254,267       $ —       $ 254,267   

Cash equivalents

      8,217,259         (252 )      8,217,007   

Marketable debt securities, current

      13,901,782         (1,104 )      13,900,678   
  

 

 

     

 

 

    

 

 

  

Total cash, cash equivalents, and marketable securities

    $ 22,373,308       $ (1,356 )    $ 22,371,952   
  

 

 

     

 

 

    

 

 

  

At September 30, 2013, our investments in money market accounts are through a money market fund that invests in high quality, short-term money market instruments which are classified as cash equivalents in the accompanying Consolidated Balance Sheet due to their short maturities. The investment seeks to provide the highest possible level of current income while still maintaining liquidity and preserving capital. From time to time, we carry cash balances in excess of federally insured limits. Our cash balance at September 30, 2013 includes approximately $114,000 held by our U.K. subsidiary.