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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)
 3 Months Ended
Mar. 31, 2016
USD ($)
$ / Units
shares
Significant Accounting Policies [Line Items]  
Minimum likelihood of tax benefits being recognized upon ultimate settlement 50.00%
Recognized interest income expense and penalties related to unrecognized tax benefits | $ $ 0
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Units 350
Redemption Baskets [Member]  
Significant Accounting Policies [Line Items]  
Number of units per basket | shares 50,000
Maximum [Member]  
Significant Accounting Policies [Line Items]  
Cash equivalents maturity period 6 months