XML 21 R33.htm IDEA: XBRL DOCUMENT v2.4.1.9
Shareholder's Equity, Stock Warrants (Details) (Warrants [Member], USD $)
0 Months Ended 12 Months Ended
Oct. 06, 2010
Sep. 30, 2014
Sep. 30, 2013
Stock Warrants [Line Items]      
Number of warrant issued (in shares) 6,818,183us-gaap_StockIssuedDuringPeriodSharesOther    
Warrants term 5 years    
Exercise Price of Warrants (in dollars per share)   $ 0.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice $ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
Term remaining on outstanding warrants   1 year 0 months 7 days  
Stock Warrants [Roll Forward]      
Balance at beginning of period (in shares)   13,777,729us-gaap_ClassOfWarrantOrRightOutstanding 13,777,729us-gaap_ClassOfWarrantOrRightOutstanding
Granted (in shares)   0erhe_StockWarrantsGranted 0erhe_StockWarrantsGranted
Exercised (in shares)   0erhe_StockWarrantsExercised 0erhe_StockWarrantsExercised
Expired or cancelled (in shares)   6,500,000erhe_StockWarrantsExpiredOrCancelled 0erhe_StockWarrantsExpiredOrCancelled
Balance at end of period (in shares)   7,277,729us-gaap_ClassOfWarrantOrRightOutstanding 13,777,729us-gaap_ClassOfWarrantOrRightOutstanding
Weighted Average Exercise Price [Roll Forward]      
Balance at beginning of period (in dollars per share) $ 0.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice $ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice $ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
Balance at end of period (in dollars per share)   $ 0.28us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice $ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
Market Price Intrinsic Value [Roll Forward]      
Balance at beginning of period   $ 0erhe_WarrantsPriceIntrinsicValue $ 0erhe_WarrantsPriceIntrinsicValue
Balance at end of period   $ 0erhe_WarrantsPriceIntrinsicValue $ 0erhe_WarrantsPriceIntrinsicValue
Placement agent [Member]
     
Stock Warrants [Line Items]      
Number of warrant issued (in shares) 459,546us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Warrants term 5 years    
Weighted Average Exercise Price [Roll Forward]      
Balance at beginning of period (in dollars per share) $ 0.275us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
/ us-gaap_ClassOfWarrantOrRightAxis
= us-gaap_WarrantMember
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember