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FAIR VALUE OF FINANCIAL INSTRUMENTS - Effect of Derivative Instruments (Details) - USD ($)
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Location of Gain (Loss) on Derivatives Recognized in Income Realized gain (loss) on closed positions  
Realized Gain (Loss) on Derivatives Recognized in Income $ 137,142,260 $ 58,538,990
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income $ 4,013,120 $ (2,243,040)
Commodity Contract [Member]    
Location of Gain (Loss) on Derivatives Recognized in Income Change in unrealized gain (loss) on open positions