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Significant Accounting Policies (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Significant Accounting Policies [Abstract]      
Reserve for uncertain tax positions $ 0us-gaap_LiabilityForUncertainTaxPositionsNoncurrent   $ 0us-gaap_LiabilityForUncertainTaxPositionsNoncurrent
Annualized rate of Sponsors Fee 0.39%sgol_AnnualizedRateOfSponsorsFee 0.39%sgol_AnnualizedRateOfSponsorsFee  
Sponsor Fees 907,275us-gaap_SponsorFees 1,053,152us-gaap_SponsorFees  
Fees payable to Sponsor 303,954us-gaap_AccountsPayableRelatedPartiesCurrent   321,355us-gaap_AccountsPayableRelatedPartiesCurrent
All other expenses $ 0us-gaap_OtherCostAndExpenseOperating $ 0us-gaap_OtherCostAndExpenseOperating