Summary of Significant Accounting Policies - Schedule of Distributions Per General Share and Share (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Distributions paid to General Shares		$ 0	$ 0
General Shares [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Distributions per General Share	$ 0.10021
Distributions paid to General Shares	$ 4
Shares [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Distributions per General Share	$ 0.10021
Distributions paid to General Shares	$ 2,064,326