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ORGANIZATION AND BUSINESS - Additional Information (Details) | Dec. 06, 2007 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares $ / item shares | Dec. 31, 2020 contract $ / shares | Dec. 31, 2019 $ / shares | Dec. 31, 2018 $ / shares | Dec. 04, 2007 shares
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Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |  |
Net asset value per share | $ / shares | $ 50.00 | $ 27.81 |  | $ 17.23 |  | $ 22.95 | $ 17.82 |
Number of shares issued | shares | 300,000 |  |  |  |  |  |  |
Value of shares issued | $ | $ 15,000,000 |  |  |  |  |  |  |
Number of registered shares | shares |  | 311,000,000 |  |  |  |  |  | 11,000,000
Creation Baskets |  |  |  |  |  |  |  |
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 | $ |  | $ 350 |  |  |  |  |  |
Number of shares per basket | $ / item |  | 50,000 |  |  |  |  |  |
United States Contracts | Open Futures Contracts, Long |  |  |  |  |  |  |  |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |  |  |  |  |  |  |  |
Number of Contracts |  | 1,902 | [1] | 4,069 | [2] |  |  |
[1] | Collateral amounted to $30,014,301 on open commodity futures contracts.
[2] | Collateral amounted to $15,259,310 on open commodity futures contracts.

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