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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Detail)
 3 Months Ended
Mar. 31, 2017
$ / Unit
shares
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 | $ / Unit 1,000
Maximum [Member]  
Significant Accounting Policies [Line Items]  
Cash equivalents maturity period 6 months
Creations and Redemptions Basket [Member]  
Significant Accounting Policies [Line Items]  
Number of units per basket | shares 100,000