Derivative Instruments - Fair Value of Derivative Instruments (Detail) - Commodity Futures Contract [Member] - Not Designated as Hedging Instrument [Member] - USD ($)		Mar. 31, 2022	Dec. 31, 2021
Derivatives Fair Value [Line Items]
Assets	[1]	$ 2,140,405	$ 877,836
Liabilities	[1]	$ (1,375,564)	$ (3,024,948)

[1] Includes cumulative appreciation (depreciation) of commodity futures contracts. Only the current day’s variation margin receivable (payable) is reported in the March 31, 2022 and December 31, 2021 Statements of Financial Condition.