Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 191,355,788	$ 112,005,375
Exchange-Traded Fund	20,001,124	36,070,938
Money Market Mutual Fund	205,040,366	281,668,913
Total Investments in Securities	416,397,278	429,745,226
Commodity Futures Contracts, Appreciation		51,567,124
Other Investments:
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	(82,594,821)
Total Investments	333,802,457	481,312,350
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Exchange-Traded Fund	20,001,124	36,070,938
Money Market Mutual Fund	205,040,366	281,668,913
Total Investments in Securities	225,041,490	317,739,851
Commodity Futures Contracts, Appreciation		51,567,124
Other Investments:
Commodity Futures Contracts, Unrealized Appreciation (Depreciation)	(82,594,821)
Total Investments	142,446,669	369,306,975
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
United States Treasury Obligations	191,355,788	112,005,375
Total Investments in Securities	191,355,788	112,005,375
Other Investments:
Total Investments	$ 191,355,788	$ 112,005,375