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Income Taxes Nol's by Jurisdiction (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Domestic  
Nol's by jurisdiction [Line Items]  
Operating loss carryforwards $ 823.6us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
Foreign - -unlimited carry forward  
Nol's by jurisdiction [Line Items]  
Operating loss carryforwards 36.1us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= emax_ForeignTaxAuthorityunlimitedcarryforwardMember
Foreign - limited carry forward  
Nol's by jurisdiction [Line Items]  
Operating loss carryforwards $ 9.6us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= emax_ForeignTaxAuthoritylimitedcarryforwardMember