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Patents (Tables) | 12 Months Ended
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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 |

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