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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Percentage of management fee in average daily total net assets	0.75%
Registration fees and offering expenses	$ 234,290	$ 0	$ 0
Estimated investor tax reporting cost	$ 221,600	90,200	111,000
Percentage of fees and other waivers expense	0.15%
Expenses write off	$ 660,603
BNO [Member]
Estimated directors fees and expenses	28,104	19,301	15,970
BNO and Related Public Fund [Member]
Estimated directors fees and expenses	$ 585,896	$ 556,951	$ 521,689