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Property and Equipment
9 Months Ended
Sep. 30, 2011
Property and Equipment 
Property and Equipment

5. Property and Equipment

Property and equipment consist of the following:

 

     September 30,
2011
    December 31,
2010
 

Equipment

   $ 9,966,128      $ 8,950,043   

Equipment held for lease

     547,416        547,416   

Leasehold improvements

     2,328,381        2,473,880   
                
     12,841,925        11,971,339   

Less: Accumulated depreciation

     (9,207,740     (8,130,717
                

Net property and equipment

   $ 3,634,185      $ 3,840,622