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ORGANIZATION AND BUSINESS (Details Textual) (USD $) | 1 Months Ended | 21 Months Ended |  |  |  |  | 3 Months Ended |
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Feb. 29, 2012 | Jun. 02, 2010 | Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | May 31, 2010 | Mar. 31, 2013 Prior to July 1, 2011 [Member] | Mar. 31, 2013 Open Futures Contracts - Long [Member] United States [Member] ICE Brent Crude Oil Futures CO May 2013 contracts, expiring April 2013 [Member] Contracts
Number of Contracts |  |  |  |  |  |  |  |  | 416
Units Issued During Period To Authorized Purchasers Through Distributors | 50,000 |  |  |  |  |  |  |  |
Units Issued During Period To Authorized Purchasers Through Marketing Agent | 100,000 |  |  |  |  |  |  |  |
Transaction Fee |  |  | $ 350 |  |  |  |  | $ 1,000 |
Initially Registered Units Of Entity With Sec |  |  |  |  |  |  | 50,000,000 |  |
Net asset value per unit |  | $ 50.00 | $ 83.26 | $ 81.95 | $ 86.30 | $ 74.54 |  |  |
Initial stock units issued |  | 200,000 |  |  |  |  |  |  |
Initial Units Value, Issued |  | $ 10,000,000 |  |  |  |  |  |  |
Total Units Registered Of Entity |  |  | 50,000,000 |  |  |  |  |  |

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