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Commitments and Contingencies (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Loss Contingencies [Line Items]    
Litigation Charges   $ 3.5us-gaap_LossContingencyLossInPeriod
Commitments and Contingencies (Textual) [Abstract]    
Return of payments received for components sold $ 16.7elon_ReturnOfPaymentsReceivedForComponentsSold