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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)	Sep. 30, 2018 $ / Unit
Significant Accounting Policies [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	1,000
Redemption Baskets [Member]
Significant Accounting Policies [Line Items]
Number of units per basket	100,000