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%