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Financial Highlights (Details) (Teucrium Natural Gas Fund [Member], USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Jan. 31, 2011
Teucrium Natural Gas Fund [Member]
      
Net asset value per share at beginning of period $ 11.56 $ 13.81 $ 25
Investment income $ 0.00 $ 0.00  
Net realized and unrealized gain (loss) on commodity futures contracts $ 1.08 $ (2.75)  
Total expenses $ (0.04) $ (0.04)  
Net increase (decrease) in net asset value $ 1.04 $ (2.79)  
At end of period $ 12.60 $ 11.02 $ 25
Total return 9.00% (20.20%)  
Total expense 1.47% 1.57%  
Net investment gain (loss) (1.42%) (1.51%)  
Reduction in expenses due to Sponsor involvement $ 19,000 $ 3,800  
Capped management fee and expenses percentage 1.50%