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CONTRACTS AND AGREEMENTS (Details Textual) - Jun. 30, 2015
USD ($)
$ / Units
Annual Fee Payable For Transfer Agency Services $ 20,000
Maximum [Member]  
Transaction fees per transaction | $ / Units 15
Commission Per Round Turn $ 15
Minimum [Member]  
Annual Fee Payable For Transfer Agency Services $ 75,000
Transaction fees per transaction | $ / Units 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