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FAIR VALUE OF FINANCIAL INSTRUMENTS - Effect of Derivative Instruments (Details) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income $ 33,569,439 $ 10,893,372
Commodity Contracts | Realized gain (loss) on closed positions    
Derivative Instruments, Gain (Loss) [Line Items]    
Realized Gain (Loss) on Derivatives Recognized in Income 49,901,670 (4,026,962)
Commodity Contracts | Change in unrealized gain (loss) on open positions    
Derivative Instruments, Gain (Loss) [Line Items]    
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income $ 33,569,439 $ 10,893,372