Summary of Significant Accounting Policies Concentrations (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Licensee 1 [Member] | Revenue, Rights Granted [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	21.00%	26.00%	35.00%
Licensee 1 [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	34.00%	18.00%
Licensee 2 [Member] | Revenue, Rights Granted [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	17.00%	19.00%
Licensee 2 [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	30.00%	15.00%
Licensee 3 [Member] | Revenue, Rights Granted [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%	15.00%
Licensee 3 [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	25.00%	14.00%
Licensee 4 [Member] | Revenue, Rights Granted [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Licensee 4 [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		13.00%
Licensee 5 [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, percentage		10.00%
Licensees in foreign jurisdictions [Member] | Revenue, Rights Granted [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	43.00%	49.00%	6.00%