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Financial Highlights (Details) (Teucrium Soybean Fund [Member], USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Sep. 16, 2011
Teucrium Soybean Fund [Member]
      
Net asset value per share at beginning of period $ 24.13 $ 21.86 $ 25
Investment income $ 0.00 $ 0.00  
Net realized and unrealized gain (loss) on commodity futures contracts $ (0.17) $ 2.79  
Total expenses $ (0.31) $ (0.59)  
Net increase (decrease) in net asset value $ (0.48) $ 2.20  
At end of period $ 23.65 $ 24.06 $ 25
Total return (1.99%) 10.11%  
Total expense 5.24% 10.51%  
Net investment gain (loss) (5.19%) (10.44%)  
Expenses subject to reimbursement $ 560,000