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FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of BNO'S Securities (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Short-Term Investments	$ 88,673,174	$ 67,609,727
Exchange-Traded Futures Contracts
Foreign Contracts	5,527,370	(6,289,510)
Fair Value, Inputs, Level 1 [Member]
Short-Term Investments	88,673,174	67,609,727
Exchange-Traded Futures Contracts
Foreign Contracts	5,527,370	(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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