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Significant Accounting Policies (Details Narrative)
 3 Months Ended
Sep. 30, 2020
USD ($)
oz
shares
Jun. 30, 2020
USD ($)
Accounting Policies [Abstract]    
Fee paid to sponsor, annualized rate 0.50%  
Fees payable to sponsor, value $ 6,000 $ 4,000
Minimum block of shares issued redeemed | shares 50,000  
Transaction fee for creations and redemptions $ 500  
Maximum amount of platinum to be held by trust unallocated account | oz 192  
Open tax year for examination As of September 30, 2020, the 2020, 2019 and 2018 tax years remain open for examination.