Derivative Instruments - Effect of Derivative Instruments on Statements of Income and Expenses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, net realized gain (loss)	$ (55,580,401)	$ 20,907,936	$ 66,438,756
Futures contracts, net unrealized gain (loss)	39,895,432	(89,540,771)	16,836,227
Commodity Futures Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Futures contracts, net realized gain (loss)	(55,580,401)	20,907,936	66,438,756
Futures contracts, net unrealized gain (loss)	39,895,432	(89,540,771)	16,836,227
Future contracts, net realized and unrealized gain (loss)	$ (15,684,969)	$ (68,632,835)	$ 83,274,983