Summary of Significant Accounting Policies Concentration Risk (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Concentrations
Effective Income Tax Rate Reconciliation, Percent	(1.00%)	0.00%	1.00%	(2.00%)
Licensee 1 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	57.00%		57.00%		100.00%
Licensee 1 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	44.00%	96.00%	73.00%	57.00%
Licensee 2 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	22.00%		22.00%
Licensee 2 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	25.00%			23.00%
Licensee 3 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	12.00%		12.00%
Licensee 3 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	17.00%			10.00%
Licensees in foreign jurisdictions [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	61.00%	3.00%	15.00%	39.00%