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Summary of Significant Accounting Policies Concentration Risk (Details) |  |  | 3 Months Ended |  |  | 3 Months Ended |  |  | 3 Months Ended
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Mar. 31, 2013 Licensee 1 [Member] | Dec. 31, 2012 Licensee 1 [Member] | Mar. 31, 2013 Licensee 1 [Member] License Revenues [Member] | Mar. 31, 2012 Licensee 1 [Member] License Revenues [Member] | Mar. 31, 2013 Licensee 2 [Member] | Dec. 31, 2012 Licensee 2 [Member] | Mar. 31, 2013 Licensee 2 [Member] License Revenues [Member] | Mar. 31, 2012 Licensee 2 [Member] License Revenues [Member] | Mar. 31, 2013 Licensee 3 [Member] | Dec. 31, 2012 Licensee 3 [Member] | Mar. 31, 2013 Licensee 3 [Member] License Revenues [Member] | Mar. 31, 2012 Licensee 3 [Member] License Revenues [Member] | Mar. 31, 2013 Licensees in foreign jurisdictions [Member] License Revenues [Member] | Mar. 31, 2012 Licensees in foreign jurisdictions [Member] License Revenues [Member]
Concentrations |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage - Revenues |  |  | 65.00% | 54.00% |  |  | 14.00% | 20.00% |  |  | 13.00% | 18.00% | 15.00% | 74.00%
Concentration Risk, Percentage - Accounts Receivable | 44.00% | 34.00% |  |  | 24.00% | 30.00% |  |  | 22.00% | 25.00% |  |  |  |

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- Definition Licensees contributing to accounts receivable balance + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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