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Property and Equipment
3 Months Ended
Mar. 31, 2013
Property and Equipment [Abstract]  
Property and Equipment
3.   Property and Equipment

Property and equipment consisted of the following:

 

                 
    March 31,
2013
    December 31,
2012
 

Computer hardware

  $ 2,370     $ 2,098  

Computer software

    9,195       8,477  

Equipment

    13,975       13,731  

Furniture

    1,229       1,213  

Leasehold improvements

    3,924       3,883  
   

 

 

   

 

 

 
      30,693       29,402  

Less accumulated depreciation and amortization

    (19,311     (18,389
   

 

 

   

 

 

 
    $ 11,382     $ 11,013