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Fair Value Measurements (Schedule of Assets and Liabilities Measured at Fair Value) (Details) (Teucrium Soybean Fund [Member], USD $)
Mar. 31, 2013
Dec. 31, 2012
Assets:    
Commodity futures contracts $ 4,075 $ 63,200
Liabilities:    
Commodity futures contracts 85,400 284,575
Commodity Contract [Member]
   
Assets:    
Commodity futures contracts 4,075 63,200
Liabilities:    
Commodity futures contracts 85,400 284,575
Level 1 [Member]
   
Assets:    
Cash equivalents 6,175,074 6,169,205
Total 6,179,149 6,232,405
Level 1 [Member] | Commodity Contract [Member]
   
Assets:    
Commodity futures contracts 4,075 63,200
Liabilities:    
Commodity futures contracts 78,550 284,575
Level 2 [Member]
   
Assets:    
Cash equivalents      
Total      
Level 2 [Member] | Commodity Contract [Member]
   
Assets:    
Commodity futures contracts      
Liabilities:    
Commodity futures contracts 6,850   
Level 3 [Member]
   
Assets:    
Cash equivalents      
Total      
Level 3 [Member] | Commodity Contract [Member]
   
Assets:    
Commodity futures contracts      
Liabilities:    
Commodity futures contracts