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CONTRACTS AND AGREEMENTS (Details Textual) | 12 Months Ended
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Dec. 31, 2018 USD ($) $ / Unit
Annual Fee Payable For Transfer Agency Services | $ 20,000
Maximum [Member] |
Transaction fees per transaction | $ / Unit | 15
Commission Per Round Turn | $ 8
Minimum [Member] |
Annual Fee Payable For Transfer Agency Services | $ 75,000
Transaction fees per transaction | $ / Unit | 7
Commission Per Round Turn | $ 7
First $500 Million Of The Related Public Funds' Combined Net Assets [Member] |
Fee percentage | 0.06%
First $500 Million Of The Related Public Funds' Combined Net Assets [Member] | Maximum [Member] |
Base amount for determining fee percentage | $ 500,000,000
Related Public Funds' Combined Net Assets Greater Than $500 Million But Less Than $1 Billion [Member] |
Fee percentage | 0.0465%
Related Public Funds' Combined Net Assets Greater Than $500 Million But Less Than $1 Billion [Member] | Maximum [Member] |
Base amount for determining fee percentage | $ 1,000,000,000
Related Public Funds' Combined Net Assets Greater Than $500 Million But Less Than $1 Billion [Member] | Minimum [Member] |
Base amount for determining fee percentage | $ 500,000,000
Related Public Funds' Combined Net Assets Exceed $1 Billion [Member] |
Fee percentage | 0.035%
Related Public Funds' Combined Net Assets Exceed $1 Billion [Member] | Minimum [Member] |
Base amount for determining fee percentage | $ 1,000,000,000
Marketing Agreement [Member] | BNO's assets up to $3 billion [Member] |
Fee percentage | 0.06%
Marketing Agreement [Member] | BNO's assets up to $3 billion [Member] | Maximum [Member] |
Base amount for determining fee percentage | $ 3,000,000,000
Marketing Agreement [Member] | BNO's assets in excess of $3 billion [Member] |
Fee percentage | 0.04%
Marketing Agreement [Member] | BNO's assets in excess of $3 billion [Member] | Maximum [Member] |
Fee percentage | 10.00%
Marketing Agreement [Member] | BNO's assets in excess of $3 billion [Member] | Minimum [Member] |
Base amount for determining fee percentage | $ 3,000,000,000

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