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ORGANIZATION AND BUSINESS (Details) | Dec. 06, 2007 USD ($) $ / shares shares | Sep. 30, 2025 USD ($) contract $ / shares shares | Jun. 30, 2025 $ / shares | Dec. 31, 2024 $ / shares | Sep. 30, 2024 $ / shares | Jun. 30, 2024 $ / shares | Dec. 31, 2023 $ / shares | Dec. 04, 2007 shares
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ORGANIZATION AND BUSINESS |  |  |  |  |  |  |  |
Number of oil futures contracts held | contract |  | 665 |  |  |  |  |  |
Number of registered shares |  |  |  |  |  |  |  | 11,000,000
Net asset value per share | $ / shares | $ 50 | $ 35.5 | $ 35.19 | $ 38.01 | $ 35.91 | $ 40.54 | $ 35.23 |
Number of shares issued | 300,000 |  |  |  |  |  |  |
Value of shares issued | $ | $ 15,000,000 |  |  |  |  |  |  |
Creation Baskets |  |  |  |  |  |  |  |
ORGANIZATION AND BUSINESS |  |  |  |  |  |  |  |
Number of shares per basket |  | 50,000 |  |  |  |  |  |
Fee paid by authorized purchasers for each order they place to create one or more creation baskets or to redeem one or more baskets | $ |  | $ 350 |  |  |  |  |  |

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