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ORGANIZATION AND BUSINESS (Details Textual) (USD $)
 1 Months Ended 21 Months Ended 3 Months Ended
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