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Significant Accounting Policies (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Nov. 04, 2019
Nov. 03, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Significant Accounting Policies [Abstract]          
Percentage of gold held by UBS A.G.     0.00%    
Basket of shares 100,000 50,000      
Fair value transfers     $ 0   $ 0
Gold receivable     10,839,176   2,916,821
Gold payable     $ 0   0
Annualized rate of Sponsors Fee     0.17%    
Maximum sponsor fee for administrative and marketing expenses     $ 100,000    
Reserve for uncertain tax positions     0   0
Sponsor Fees     587,711 $ 373,202  
Fees payable to Sponsor     211,480   171,336
All other expenses     $ 0   $ 0