Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets

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Intangible Assets
 6 Months Ended
Jun. 30, 2012
Intangible Assets [Abstract]  
Intangible Assets
(2)           Intangible Assets

Intangible assets consist of the following (in thousands):

   
June 30, 2012
    
December 31, 2011
  
   
Gross
carrying
value
    
Accumulated
amortization
    
Gross
carrying
value
    
Accumulated
Amortization
  
Amortizable intangible assets
                        
Patents
   $  2,624     $  2,322     $  2,624     $  2,262  

Amortization expense related to intangible assets totaled $11,000 and $60,000 for each of the three and six months ended June 30, 2012 and totaled $53,000 and $106,000 for each of the three and six months ended June 30, 2011. The aggregate estimated amortization expense for intangible assets remaining as of June 30, 2012 is as follows (in thousands):

2012
   $ 22  
2013
     44  
2014
     44  
2015
     44  
2016
     44  
over 5 years
     104  
         
Total
   $ 302