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INVESTMENTS
9 Months Ended
Sep. 30, 2011
INVESTMENTS [Abstract] 
INVESTMENTS
4.
INVESTMENTS

Investments consist of long-term U.S. government agency securities carried at amortized cost using the effective interest method. The Company classifies its marketable securities as held-to-maturity based upon management's positive intention and ability to hold these securities until their maturity dates.
 
The following table summarizes information about held-to-maturity investments at September 30, 2011:

   
Amortized Cost
  
Gross Unrealized Gains
  
Estimated Fair Value
 
U.S. government agency securities
 $5,007,928  $38,149  $5,046,077 

As of September 30, 2011, the estimated fair value of the investments was greater than the amortized cost. Because management intends to hold the investments until their maturity dates, this unrealized gain was not recorded in the consolidated financial statements.

The maturities of held-to-maturity investments at September 30, 2011 were as follows:

   
After 2 Years through 3 Years
  
After 3 Years through 4 Years
  
After 4 Years through 5 Years
  
Total
 
U.S. government agency securities
 $1,511,715  $2,250,000  $1,246,213  $5,007,928