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Significant Accounting Policies (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Significant Accounting Policies [Abstract]      
Basket of shares 50,000    
Fair value transfers $ 0 $ 0  
Bullion receivable 7,619,507    
Bullion payable 0    
Reserve for uncertain tax positions $ 0    
Annualized rate of Sponsors Fee 0.60% 0.60% 0.60%
Sponsor Fees $ 2,403,544 $ 2,132,987 $ 1,942,976
Fees payable to Sponsor 248,496 182,586  
All other expenses $ 0 $ 0