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Derivative Liabilities (Details) (USD $)
12 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Derivative [Line Items]    
Fair value of the derivatives $ 1,016,044us-gaap_DerivativeLiabilities  
Day 1 Loss on embedded derivative 392,220us-gaap_EmbeddedDerivativeLossOnEmbeddedDerivative 0us-gaap_EmbeddedDerivativeLossOnEmbeddedDerivative
Convertible Notes [Member]    
Derivative [Line Items]    
Initial percentage of event of default (in hundredths) 0.00%erhe_InitialPercentageOfEventOfDefaultOccurred
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Increasing percentage of event of default (in hundredths) 1.00%erhe_IncreasingPercentageOfEventOfDefaultOccurred
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Maximum percentage of event of default (in hundredths) 10.00%erhe_MaximumPercentageOfEventOfDefaultOccurred
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Initial percentage of redemption of notes (in hundredths) 0.00%erhe_InitialPercentageOfRedemptionOfNotes
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Increasing percentage of redemption of notes (in hundredths) 1.00%erhe_IncreasingPercentageOfRedemptionOfNotes
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Maximum percentage of redemption of notes (in hundredths) 5.00%erhe_MaximumPercentageOfRedemptionOfNotes
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Multiplier of conversion price to convert notes, maximum 2erhe_MultiplierOfConversionPriceToConvertNotesMaximum
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
 
Conversion period one to convert notes 0 days  
Conversion period two to convert notes 90 days  
Conversion period three to convert notes 180 days  
Convertible Notes [Member] | Minimum [Member]    
Derivative [Line Items]    
Percentage of conversion of notes specified on market price (in hundredths) 40.00%erhe_PercentageOfConversionOfNotesSpecifiedOnMarketPrice
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Percentage of projected volatility curve (in hundredths) 101.00%erhe_PercentageOfProjectedVolatilityCurve
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Convertible Notes [Member] | Maximum [Member]    
Derivative [Line Items]    
Percentage of conversion of notes specified on market price (in hundredths) 60.00%erhe_PercentageOfConversionOfNotesSpecifiedOnMarketPrice
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Percentage of projected volatility curve (in hundredths) 103.00%erhe_PercentageOfProjectedVolatilityCurve
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Warrants [Member]    
Derivative [Line Items]    
Warrant exercise price one (in dollars per share) $ 0.355erhe_WarrantExercisePriceOne
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Warrant exercise price two (in dollars per share) $ 0.28erhe_WarrantExercisePriceTwo
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Warrant exercise price three (in dollars per share) $ 0.275erhe_WarrantExercisePriceThree
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Fair value of the derivatives 1,021,942us-gaap_DerivativeLiabilities
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Loss on change in fair value of derivative liabilities 136,811us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Multiplier of higher of the projected reset price or stock price to calculate warrant exercise price 2erhe_MultiplierOfHigherOfProjectedResetPriceOrStockPriceToCalculateWarrantExercisePrice
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Day 1 Loss on embedded derivative $ 392,220us-gaap_EmbeddedDerivativeLossOnEmbeddedDerivative
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
 
Warrants [Member] | Minimum [Member]    
Derivative [Line Items]    
Percentage of projected volatility curve (in hundredths) 101.00%erhe_PercentageOfProjectedVolatilityCurve
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Warrants [Member] | Maximum [Member]    
Derivative [Line Items]    
Percentage of projected volatility curve (in hundredths) 103.00%erhe_PercentageOfProjectedVolatilityCurve
/ us-gaap_DerivativeByNatureAxis
= us-gaap_WarrantMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember