Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets

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Intangible Assets
 9 Months Ended
Sep. 30, 2011
Intangible Assets [Abstract]  
Intangible Assets
 (2)  Intangible Assets
 
Intangible assets consist of the following (in thousands):

 
September 30, 2011
December 31, 2010
 
Gross
carrying
value
 
Accumulated
amortization
Gross
carrying
value
 
Accumulated
Amortization
Amortizable intangible assets
 
Patents
 
 
$          2,624
 
 
$        2,209
 
 
$      2,624
 
 
$      2,050

Amortization expense related to intangible assets totaled $53,000 and $159,000 for each of the three and nine months ended September 30, 2011 and totaled $53,000 and $159,000 for each of the three and nine months ended September 30, 2010. The aggregate estimated amortization expense for intangible assets remaining as of September 30, 2011 is as follows (in thousands):
 
 
 2011   $ 53  
 2012     82  
 2013     44  
 2014     44  
 2015     44  
 over 5 years     148  
         
 Total   $ 415