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Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value) (Details) (Teucrium Corn Fund [Member], USD $)
Mar. 31, 2013
Dec. 31, 2012
Assets:    
Cash equivalents $ 39,167,369 $ 34,631,982
Liabilities:    
Commodity futures contracts 2,824,800 2,213,775
Commodity Contract [Member]
   
Assets:    
Commodity futures contracts      
Liabilities:    
Commodity futures contracts 2,824,800 2,213,775
Level 1 [Member]
   
Assets:    
Cash equivalents 39,167,369 34,631,982
Level 1 [Member] | Commodity Contract [Member]
   
Liabilities:    
Commodity futures contracts 1,813,838 2,213,775
Level 2 [Member]
   
Assets:    
Cash equivalents      
Level 2 [Member] | Commodity Contract [Member]
   
Liabilities:    
Commodity futures contracts      
Level 3 [Member]
   
Assets:    
Cash equivalents      
Level 3 [Member] | Commodity Contract [Member]
   
Liabilities:    
Commodity futures contracts