Organization - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 CreationUnit shares	Dec. 31, 2022 shares	May 23, 2005 shares
Organization, Consolidation and Presentation of Financial Statements [Abstract]
General shares, shares issued	40	40	40
Treasury obligation measurement maximum maturity period	12 months
Minimum number of Creation Units that can be purchased | CreationUnit	1
Number of shares issued per Creation Unit	50,000