Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate and the estimated effective income tax rate for the periods presented is as follows:

	Three Months Ended March 31,
	2014		2013
Statutory federal tax rate - benefit (expense)	35	%	(35	)%
Noncontrolling interests in operating subsidiaries	(1	)%	—	%
Nondeductible permanent items	(3	)%	(5	)%
Other	(1	)%	—	%
Valuation allowance	(25	)%	1	%
	5	%	(39	)%

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Concentrations. One licensee individually accounted for 39% of revenues recognized during the three months ended March 31, 2014, and three licensees individually accounted for 65%, 14% and 13% of revenues recognized during the three months ended March 31, 2013. Two licensees individually represented approximately 43% and 28% of accounts receivable at March 31, 2014. Two licensees individually represented approximately 60% and 22% of accounts receivable at December 31, 2013. For the three months ended March 31, 2014, 16% of revenues were attributable to licensees domiciled in foreign jurisdictions. For the three months ended March 31, 2013, 15% of revenues were attributable to licensees domiciled in foreign jurisdictions.

Marketable Securities

Short-term marketable securities for the periods presented were comprised of the following (in thousands):

	March 31, 2014
Security Type	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government fixed income securities(1)	$	96,573	$	14	$	(997	)	$	95,590
Total short-term investments	$	96,573	$	14	$	(997	)	$	95,590

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⁽¹⁾ Maturity dates ranging from 2014 to 2015.

	December 31, 2013
Security Type	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government fixed income securities	$	130,971	$	21	$	(975	)	$	130,017
Total short-term investments	$	130,971	$	21	$	(975	)	$	130,017