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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - Creation Baskets
Jun. 30, 2020
USD ($)
$ / item
Significant Accounting Policies [Line Items]  
Number of Shares per basket | $ / item 50,000
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ $ 350