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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Directors fees and expenses | $ 220,736 | $ 106,413 | $ 81,479
Licensing fee incurred | 156,303 | 70,615 | 50,610
Investor tax reporting cost | 1,120,961 | 1,243,549 | 670,349
UNG and the Related Public Funds |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Directors fees and expenses | $ 1,210,000 | 1,258,000 | 1,081,963
UNG |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Monthly fee obligated to pay on average daily total net assets, maximum base fee 1,000,000,000 (as a percentage) | 0.60 |  |
Average daily total net assets | $ 1,000,000,000 |  |
Monthly fee obligated to pay on average daily total net assets (as a percentage) | 0.50 |  |
Directors fees and expenses | $ 220,736 | 106,413 | 81,479
Licensing Agreements |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Fee percentage | 0.015% |  |
United States Oil Fund LP |  |  |
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS |  |  |
Registration fees and offering expenses | $ 0 | $ 0 | $ 103,290

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