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Summary of Significant Accounting Policies Concentration Risk (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Concentrations |  |  |
Effective Income Tax Rate Reconciliation, Percent | (1.00%) | (11.00%) |
Licensee 1 [Member] |  |  |
Concentrations |  |  |
Concentration Risk, Percentage - Accounts Receivable | 50.00% |  | 100.00%
Licensee 1 [Member] | License Revenues [Member] |  |  |
Concentrations |  |  |
Concentration Risk, Percentage - Revenues | 96.00% | 73.00% |
Licensee 2 [Member] |  |  |
Concentrations |  |  |
Concentration Risk, Percentage - Accounts Receivable | 33.00% |  |
Licensee 2 [Member] | License Revenues [Member] |  |  |
Concentrations |  |  |
Concentration Risk, Percentage - Revenues |  | 12.00% |
Licensees in foreign jurisdictions [Member] | License Revenues [Member] |  |  |
Concentrations |  |  |
Concentration Risk, Percentage - Revenues | 2.00% | 92.00% |

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