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Intangible Assets | 12 Months Ended
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Dec. 31, 2012
Intangible Assets | (3) Intangible Assets Intangible assets as of December, 2012 are as follows:
|  | Gross |  |  | Accumulated Amortization |  |  | Net |  |  | Weighted Average Remaining Useful Life (years) |
Technology rights |  | $ | 11,624 |  |  | $ | (269 | ) |  | $ | 11,355 |  |  |  | 18.0 |
Amortization expense for the year ended December 31, 2012 was $0.3 million and is included in research and development expense. Estimated amortization expense, based upon the Company’s intangible assets at December 31, 2012 is as follows:
Year Ending December 31, |  | Amount |
2013 |  | $ | 646 |
2014 |  |  | 646 |
2015 |  |  | 646 |
2016 |  |  | 646 |
2017 |  |  | 646 |
Thereafter |  |  | 8,125 |
Total |  | $ | 11,355 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44, 45, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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