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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Percentage Of Management Fee In Average Daily Total Net Assets | 0.75% |  |
Estimated Investor Tax Reporting Cost | $ 174,000 | $ 140,000 | $ 133,000
Percentage Of Fees and Other Waivers Expense | 0.15% |  |
Expenses Write Off | $ 190,095 |  |
BNO [Member] |  |  |
Estimated Directors Fees and Expenses | 11,565 | 10,575 | 9,150
BNO and Related Public Fund [Member] |  |  |
Estimated Directors Fees and Expenses | $ 582,050 | $ 569,303 | $ 567,863

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- Details
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- Details
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