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FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of BNO'S Securities (Details) - USD ($) | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Short-Term Investments | $ 78,720,170 | $ 67,609,727
Exchange-Traded Futures Contracts |  |
Foreign Contracts | (6,631,410) | (6,289,510)
Fair Value, Inputs, Level 1 [Member] |  |
Short-Term Investments | 78,720,170 | 67,609,727
Exchange-Traded Futures Contracts |  |
Foreign Contracts | (6,631,410) | (6,289,510)
Fair Value, Inputs, Level 2 [Member] |  |
Short-Term Investments | 0 | 0
Exchange-Traded Futures Contracts |  |
Foreign Contracts | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |
Short-Term Investments | 0 | 0
Exchange-Traded Futures Contracts |  |
Foreign Contracts | $ 0 | $ 0

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