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Equipment
12 Months Ended
Dec. 31, 2011
Equipment: [Abstract]  
Equipment:

 

4. Equipment:

Equipment consists of the following:

 

     December 31,  
     2011     2010  

Office and laboratory equipment

   $ 5,426,183      $ 5,118,417   

Less accumulated depreciation

     (2,138,075     (1,693,548
  

 

 

   

 

 

 
   $ 3,288,108      $ 3,424,869   
  

 

 

   

 

 

 

Depreciation expense for years ended December 31, 2011, 2010 and 2009 was approximately $445,000, $422,000 and $176,000, respectively.