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FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Condensed Statements of Operations) (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]        
Realized Gain (Loss) on Derivatives Recognized in Income $ (696,645) $ 17,110 $ (5,095,785) $ 2,485,620
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income     2,579,334 (1,612,110)
Commodity Contracts [Member] | Futures [Member] | Realized gain on closed positions        
Derivative Instruments, Gain (Loss) [Line Items]        
Realized Gain (Loss) on Derivatives Recognized in Income     (5,095,785) 2,485,620
Commodity Contracts [Member] | Futures [Member] | Change in unrealized gain on open positions        
Derivative Instruments, Gain (Loss) [Line Items]        
Change in Unrealized Gain or (Loss) on Derivatives Recognized in Income     $ 2,579,334 $ (1,612,110)