Property and Equipment
 12 Months Ended
Dec. 31, 2013
Property Plant And Equipment [Abstract]  
Property and Equipment

3. Property and Equipment

Property and equipment consist of the following:

 

     December 31,  
     2013     2012  

Computer equipment

    $ 82,252      $ 92,318   

Furniture and fixtures

      46,523        42,736   

Scientific equipment

      2,851,947        2,824,076   

Leasehold improvements

      319,553        319,553   
  

 

 

    

 

 

  
     3,300,275        3,278,683   

Less accumulated depreciation

      (3,232,003 )      (3,220,417 ) 
  

 

 

    

 

 

  
   $ 68,272      $ 58,266   
  

 

 

    

 

 

  

Depreciation expense for the years ended December 31, 2013 and 2012 was $23,249 and $47,747 respectively.