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Fair Value Measurement of Assets and Liabilities (Tables)
3 Months Ended
Mar. 31, 2012
Fair Value Measurement of Assets and Liabilities [Abstract]  
Financial assets and liabilities measured at fair value on a recurring basis
                                 
Description   Balances as of
March 31,
2012
    Quoted Prices in
active markets for
identical Assets
(Level 1)
    Balances as of
December 31,
2011
    Quoted Prices in
active markets for
identical Assets
(Level 1)
 

Assets

                               

Cash and Cash Equivalents:

                               

Money Market Funds

  $ 24,953,117     $ 24,953,117     $ 20,836,617     $ 20,836,617  

Investments:

                               

Asset backed securities

    18,261,045       18,261,045       18,309,316       18,309,316  

Sovereign Debt Securities

    10,170,152       10,170,152       10,708,563       10,708,563  

Corporate Debt Securities

    20,335,233       20,335,233       17,824,331       17,824,331  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total financial Assets

  $ 73,719,547     $ 73,719,547     $ 67,678,827     $ 67,678,827  
   

 

 

   

 

 

   

 

 

   

 

 

 
Fair value of short and long-term investments classified as available for sale securities
                                 
    March 31, 2012  
    Gross
Amortized
Cost
    Gross
Unrealized
Gains
    Gross
Unrealized
Losses (1)
    Estimated
Fair Value
 

Short-term investments

                               

Sovereign Debt Securities

  $ 1,776,034     $ 16,721     $ (12,902   $ 1,779,853  

Corporate Debt Securities

    3,921,896       42,568       (62,360     3,902,104  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total Short-term investments

  $ 5,697,930     $ 59,289     $ (75,262   $ 5,681,957  
   

 

 

   

 

 

   

 

 

   

 

 

 

Long-term investments

                               

Sovereign Debt Securities

  $ 8,016,383     $ 418,169     $ (44,253   $ 8,390,299  

Corporate Debt Securities

    16,296,878       246,235       (109,984     16,433,129  

Asset Backed Securities (2)

    17,702,718       769,170       (210,843     18,261,045  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total Long-term investments

  $ 42,015,979     $ 1,433,574     $ (365,080   $ 43,084,473  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 47,713,909     $ 1,492,863     $ (440,342   $ 48,766,430  
   

 

 

   

 

 

   

 

 

   

 

 

 
   
    December 31, 2011  
    Gross
Amortized
Cost
    Gross
Unrealized
Gains
    Gross
Unrealized
Losses (1)
    Estimated
Fair Value
 

Short-term investments

                               

Sovereign Debt Securities

  $ 1,554,448     $ 322     $ —       $ 1,554,770  

Corporate Debt Securities

    1,375,006       —         (20,882     1,354,124  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total Short-term investments

  $ 2,929,454     $ 322     $ (20,882   $ 2,908,894  
   

 

 

   

 

 

   

 

 

   

 

 

 

Long-term investments

                               

Sovereign Debt Securities

  $ 8,483,883     $ 669,910     $ —       $ 9,153,793  

Corporate Debt Securities

    16,386,974       187,946       (104,713     16,470,207  

Asset Backed Securities (2)

    17,647,012       715,749       (53,445     18,309,316  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total Long-term investments

  $ 42,517,869     $ 1,573,605     $ (158,158   $ 43,933,316  
   

 

 

   

 

 

   

 

 

   

 

 

 

Total

  $ 45,447,323     $ 1,573,927     $ (179,040   $ 46,842,210  
   

 

 

   

 

 

   

 

 

   

 

 

 

 

(1) Unrealized losses from securities are primarily attributable to market price movements. Management does not believe any remaining unrealized losses represent other-than-temporary impairments based on our evaluation of available evidence including the credit rating of the investments, as of March 31, 2012 and December 31, 2011.
(2) Asset backed securities have investment grade credit ratings. These investments are collateralized by real estated and they are guaranteed by the U.S. Federal Gonvernment.
Estimated fair value of short-term and long-term investments
         

One year or less

  $ 5,681,957  

One year to two years

    2,184,022  

Two years to three years

    14,481,405  

Three years to four years

    10,572,742  

Four years to five years

    5,521,910  

More than five years

    10,324,394  
   

 

 

 

Total

  $ 48,766,430