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Fair Value Measurement (Tables)
6 Months Ended
Jun. 30, 2012
Assets Measured at Fair Value on Recurring Basis

The following fair value hierarchy table presents information about each major category of the Company’s assets measured at fair value on a recurring basis as of June 30, 2012:

 

     Fair value measurement at reporting date using:  
     Quoted prices in
active markets for
identical assets
(Level 1)
     Significant
other observable
inputs
(Level 2)
     Significant
unobservable
inputs
(Level 3)
     Total  

Assets:

           

Money market funds

   $ 4,205,258       $ —         $ —         $ 4,205,258   

U.S. Government and agency securities

     2,584,517         10,759,843         —           13,344,360   

Corporate and other debt securities

     —           10,008,109         —           10,008,109   
  

 

 

    

 

 

    

 

 

    

 

 

 

Total

   $ 6,789,775       $ 20,767,952       $ —         $ 27,557,727   
  

 

 

    

 

 

    

 

 

    

 

 

 
Roll Forward of Fair Value of Contingent Consideration

The following table provides a roll forward of the fair value of the contingent consideration:

 

Balance at December 31, 2011

   $ 2,197,226   

Payments

     (35,000

Changes in fair value

     62,132   

Effect of exchange rate changes

     (25,347
  

 

 

 

Balance at June 30, 2012

   $ 2,199,011