Schedule of Investments (Unaudited) - Treasury Bills and Money Market Fund (Parenthetical) - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Investment, Identifier [Axis]: U.S. Treasury Bills, 5.240% due June 6, 2024 and U.S. Treasury Bills, 5.255% due May 30, 2024
Schedule of Investments [Line Items]
Restricted for maintenance margin	$ 44,586,000
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