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Goodwill and Intangible Assets (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Goodwill And Intangible Assets Details Narrative    
Amortization of patent portfolio $ 2,422spex_AmortizationOfPatentPortfolio $ 2,428spex_AmortizationOfPatentPortfolio
Weighted average life in years 5 years 4 months 24 days