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FAIR VALUE OF FINANCIAL INSTRUMENTS - Effect of Derivative Instruments on Condensed Statements of Operations (Details) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on open position $ 2,115,554 $ 30,374,062
Commodity Contracts [Member] | Futures - Commodity Contracts [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Realized Gain (Loss) on closed position (152,858,513) (57,790,242)
Change in Unrealized Gain (Loss) on open position $ 2,115,554 $ 30,374,062