Derivative Instruments - Summary of Gross and Net Amounts of Offsetting Assets and Liabilities (Detail) - Commodity Futures Contract [Member] - Morgan Stanley & Co. LLC [Member] - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Offsetting Assets And Liabilities [Line Items]
Financial Derivative Assets, Futures Contracts	$ 37,162,344	$ 13,955,785
Financial Derivative Liabilities, Futures Contracts	(36,238,219)	(13,892,818)
Net value of derivatives, Liabilities	924,125	62,967
Net amount	$ 924,125	$ 62,967

Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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