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Patent Sale (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended
Jun. 30, 2012
Dec. 31, 2014
Patent Sale Narrative Details    
Sale of patents $ 12.0EGHT_SaleOfPatents  
Future maximum patent license collection $ 3.0EGHT_FutureMaximumPatentLicenseCollection $ 1.0EGHT_FutureMaximumPatentLicenseCollection