Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

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

Concentrations. Three licensees individually accounted for 54%, 15% and 13% of revenues recognized during the three months ended September 30, 2015, and two licensees accounted for 34% and 23% of revenues recognized during the nine months ended September 30, 2015. Three licensees individually accounted for 43%, 30% and 12% of revenues recognized during the three months ended September 30, 2014, and three licensees accounted for 29%, 18% and 11% of revenues recognized during the nine months ended September 30, 2014. For the three and nine months ended September 30, 2015, 5% and 34%, respectively, of revenues were attributable to licensees domiciled in foreign jurisdictions, based on the jurisdiction of the entity obligated to satisfy payment obligations pursuant to the applicable revenue arrangement. For the three and nine months ended September 30, 2014, 20% and 49%, respectively, of revenues were attributable to licensees domiciled in foreign jurisdictions. The Company does not have any material foreign operations.

Three licensees individually represented approximately 55%, 16% and 15% of accounts receivable at September 30, 2015. Three licensees individually represented approximately 30%, 17% and 15% of accounts receivable at December 31, 2014.

Marketable Securities

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



	December 31, 2014
Security Type	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government fixed income securities	$	58,819	$	2	$	(263	)	$	58,558
Total short-term investments	$	58,819	$	2	$	(263	)	$	58,558