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FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Condensed Statements of Operations) (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
Realized Gain (Loss) on Derivatives Recognized in Income $ 288,081 $ (1,660,068)
Change in Unrealized Gain on (Loss) on Derivatives Recognized in Income (2,185,571) 313,578
Commodity Contracts [Member] | Change in unrealized gain (loss) on open positions    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain on (Loss) on Derivatives Recognized in Income (2,185,571) 313,578
Commodity Contracts [Member] | Futures [Member] | Realized gain (loss) on closed positions    
Derivative Instruments, Gain (Loss) [Line Items]    
Realized Gain (Loss) on Derivatives Recognized in Income $ 288,081 $ (1,660,068)