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FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) (USD $)
 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Derivatives not Accounted for as Hedging Instruments Futures - Commodity Contracts  
Location of Gain or (Loss) on Derivatives Recognized in Income Change in unrealized gain (loss) on open positions  
Realized Gain or (Loss) on Derivatives Recognized in Income $ (1,556,990) $ (3,492,540)
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income $ (547,240) $ 347,910
Commodity Contract [Member]
    
Location of Gain or (Loss) on Derivatives Recognized in Income Realized loss on closed positions