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Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund (Parenthetical) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Investment, Identifier [Axis]: United States Treasury Obligations U.S. Treasury Bills, 5.240% due May 30, 2024    
Schedule of Investments [Line Items]    
Restricted for maintenance margin   $ 68,537,000
Investment, Identifier [Axis]: United states Treasury Obligations U.S. Treasury Bills, 5.250% due September 5, 2024 and U.S. Treasury Bills, 5.170% due November 29, 2024    
Schedule of Investments [Line Items]    
Restricted for maintenance margin $ 44,330,000