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Significant Accounting Policies (Details Narrative) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]      
Percentage of platinum held by sub-custodians 2.74%    
Platinum receivable $ 0 $ 0  
Platinum payable $ 0 4,461,443  
Minimum block of shares issued redeemed against platinum 50,000    
Reserve for uncertain tax positions $ 0 $ 0  
Expense ratio 0.60% 0.60% 0.60%
Maximum sponsor fee for legal expenses $ 100,000    
Sponsor's Fee 6,556,049 $ 8,241,060 $ 5,187,040
Fees payable to Sponsor 554,247 595,693  
All other expenses $ 0 $ 0