FAIR VALUE OF FINANCIAL INSTRUMENTS - Derivative instruments (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ 2,294,015	$ 1,613,858
Commodity Contracts [Member] \| Assets [Member] \| Futures [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ 2,294,015	$ 1,613,858

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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