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Patents (Tables)
12 Months Ended
Dec. 31, 2012
Patents [Abstract]  
Patent costs and accumulated amortization related to patent sales and disposals [Table Text Block]
For the years ended December 31, 2012, 2011 and 2010, patent costs and accumulated amortization related to patent-related sales and disposals are as follows (in thousands):
 
 
2012
 
2011
 
2010
 
 
 
 
 
 
 
Patent costs
 
5,500

 
4,612

 
1,540

Accumulated amortization
 
2,466

 
3,509

 
1,108

Patents
The gross carrying amounts and accumulated amortization related to acquired intangible assets as of December 31, 2012 and 2011 are as follows (in thousands): 
 
 
2012
 
2011
 
 
 
 
 
Gross carrying amount - patents                                                                             
 
$
383,379

 
$
61,519

Accumulated amortization - patents                                                                             
 
(69,850
)
 
(36,331
)
Patents, net                                                                             
 
$
313,529

 
$
25,188

Patent proceeds and other costs related to sales and disposals [Table Text Block]
For the years ended December 31, 2012, 2011 and 2010, patent proceeds and other costs related to patent-related sales and disposals are as follows (in thousands):
 
 
2012
 
2011
 
2010
 
 
 
 
 
 
 
Proceeds
 
3,347

 
11,000

 
240

Other costs
 

 
4,717

 
94