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Significant Accounting Policies (Details Narrative)
6 Months Ended
Dec. 31, 2018
USD ($)
oz
shares
Jun. 30, 2018
USD ($)
[1]
Accounting Policies [Abstract]    
Fee paid to Sponsor percentage 0.50%  
Fees payable to Sponsor $ 1,000 $ 2,000
Minimum block of shares issued redeemed | shares 15,000  
Transaction fee for creations and redemptions $ 500  
Maximum amount of platinum to be held by trust unallocated account | oz 192  
[1] Operations commenced on January 11, 2018. See Note 1.