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Variable Interest Entity
6 Months Ended
Jun. 30, 2012
Variable Interest Entity [Abstract]  
Variable Interest Entity
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Variable Interest Entity. We have a patent arrangement with a third party that we classify as a variable interest entity. We have no equity interest and are not contractually obligated to fund this entity; therefore our maximum exposure to loss as a result of our involvement with this entity is zero. We may receive royalties in the future if certain conditions are met.
 
We are not the primary beneficiary of this entity because of shared power. Therefore, we do not consolidate this entity’s financial results into our financial statements. The significant factors used to determine shared power were the contractual provisions within the arrangement that do not provide us with the power to direct the activities that most significantly impact the economic performance of the entity. The carrying amount of the assets and liabilities of this entity in our balance sheet is zero. This arrangement had no impact on our results of operations, financial position or cash flows, including the three and six month periods ended June 30, 2012 and 2011.