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Summary of Significant Accounting Policies Concentration Risk (Details) | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Concentrations |  |  |  |  |
Effective Income Tax Rate Reconciliation, Percent | (1.00%) | (12.00%) | 1.00% | 11.00% |
Licensee 1 [Member] |  |  |  |  |
Concentrations |  |  |  |  |
Concentration Risk, Percentage - Accounts Receivable | 47.00% |  | 47.00% |  | 100.00%
Licensee 1 [Member] | License Revenues [Member] |  |  |  |  |
Concentrations |  |  |  |  |
Concentration Risk, Percentage - Revenues | 48.00% | 85.00% | 87.00% | 55.00% |
Licensee 2 [Member] |  |  |  |  |
Concentrations |  |  |  |  |
Concentration Risk, Percentage - Accounts Receivable | 43.00% |  | 43.00% |  |
Licensee 2 [Member] | License Revenues [Member] |  |  |  |  |
Concentrations |  |  |  |  |
Concentration Risk, Percentage - Revenues | 42.00% |  |  | 26.00% |
Licensees in foreign jurisdictions [Member] | License Revenues [Member] |  |  |  |  |
Concentrations |  |  |  |  |
Concentration Risk, Percentage - Revenues | 43.00% | 90.00% | 6.00% | 87.00% |

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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=84177426&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 20 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611 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=84177426&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 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611 + Details
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