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