ORGANIZATION AND BUSINESS (Details)	1 Months Ended		9 Months Ended
	Feb. 26, 2008 USD ($) $ / shares shares	Nov. 30, 2007 shares	Sep. 30, 2021 item $ / item $ / shares shares	Jun. 30, 2021 $ / shares	Dec. 31, 2020 $ / shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 $ / shares	Dec. 31, 2019 $ / shares
Organization, Consolidation and Presentation of Financial Statements Disclosure [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 | $ / item			350
Number of initially registered shares on Form S-1 with the U.S. Securities and Exchange Commission		30,000,000
Net asset value per unit | $ / shares	$ 50.00		$ 38.45	$ 35.86	$ 24.29	$ 20.03	$ 18.89	$ 32.31
Number of shares issued	300,000
Value of shares issued | $	$ 15,000,000
Number of registered shares			80,000,000
Creation Baskets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of shares per basket | $ / item			50,000
Open Futures Contracts, Long [Member] | United States Contracts [Member] | NYMEX
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Contracts | item			814