Summary of Significant Accounting Policies Concentration Risk (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Concentrations
Effective Income Tax Rate Reconciliation, Percent	12.00%	17.00%	11.00%	14.00%
Licensee 1 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable	98.00%		98.00%		39.00%
Licensee 1 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	85.00%	85.00%	55.00%	53.00%
Licensee 2 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable					22.00%
Licensee 2 [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues			26.00%
Licensee 3 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable					16.00%
Licensee 4 [Member]
Concentrations
Concentration Risk, Percentage - Accounts Receivable					15.00%
Licensees in foreign jurisdictions [Member] | License Revenues [Member]
Concentrations
Concentration Risk, Percentage - Revenues	90.00%	85.00%	87.00%	63.00%