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Furniture and Equipment (Tables)
 12 Months Ended
Dec. 31, 2013
Property Plant And Equipment [Abstract]  
Furniture and Equipment Component

Furniture and equipment consisted of the following at December 31:

 

     2013     2012  

Furniture and fixtures

    $ 600      $ 596   

Office equipment

      1,266        1,486   

Software

      1,448        1,421   

Laboratory equipment

      5,721        6,050   

Leased equipment

      63        63   

Leasehold improvements

      5,316        5,316   
  

 

 

    

 

 

  
     14,414        14,932   

Less accumulated depreciation and amortization

      (14,108 )     (14,349 )
  

 

 

    

 

 

  

Furniture and equipment, net

    $ 306      $ 583