Summary of Significant Accounting Policies - Schedule of Distributions Per General Share and Share (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
General Shares [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Distributions per share	$ 1.11582	$ 1.08926	$ 0.14467
Distributions paid	$ 45	$ 44	$ 6
Shares [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Distributions per share	$ 1.11582	$ 1.08926	$ 0.14467
Distributions paid	$ 67,507,110	$ 84,798,891	$ 16,159,639