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Financial Highlights (Unaudited) - $ / shares
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Per Share Performance (for a Share outstanding throughout the entire period)    
Net asset value per Share at beginning of period $ 97.89 $ 76.20
Income from investment operations:    
Net investment loss (0.14) (0.12)
Total realized and unrealized gains or losses on investment in Bullion (6.09) (0.18)
Change in net assets from operations (6.23) (0.30)
Net asset value per Share at end of period $ 91.66 $ 75.90
Weighted average number of Shares 9,125,000 6,742,857
Expense ratio [1] 0.60% 0.60%
Net investment loss ratio [1] (0.60%) (0.60%)
Total return, net asset value [2] (6.36%) (0.39%)
[1] Annualized for periods less than one year.
[2] Total return is not annualized.