Additional Valuation Information - Summary of the Tiered Valuation Input Levels (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
United States Treasury Obligations	$ 24,988,887	$ 31,996,668
Exchange-Traded Fund	11,431,065	11,439,187
Money Market Mutual Fund	98,302,242	67,799,964
Total Investments in Securities	134,722,194	111,235,819
Commodity Futures Contracts	2,140,405	877,836
Commodity Futures Contracts	(1,375,564)	(3,024,948)
Total Other Investments	764,841	(2,147,112)
Total Investments	135,487,035	109,088,707
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Exchange-Traded Fund	11,431,065	11,439,187
Money Market Mutual Fund	98,302,242	67,799,964
Total Investments in Securities	109,733,307	79,239,151
Commodity Futures Contracts	2,140,405	877,836
Commodity Futures Contracts	(1,375,564)	(3,024,948)
Total Other Investments	764,841	(2,147,112)
Total Investments	110,498,148	77,092,039
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
United States Treasury Obligations	24,988,887	31,996,668
Total Investments in Securities	24,988,887	31,996,668
Total Investments	$ 24,988,887	$ 31,996,668