XML 38 R23.htm IDEA: XBRL DOCUMENT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	Jun. 30, 2019 $ / item
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	350
Creation Baskets
Significant Accounting Policies [Line Items]
Number of Shares per basket	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	50,000
Scenario Forecast
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	350