v3.26.1
FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of securities using fair value hierarchy (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ 78,100,000 $ 29,500,000
Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 3,036,388 709,073
Level I | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 78,100,000 29,500,000
Level I | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 3,036,388 709,073
Level II | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level II | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level III | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 0 0
Level III | Exchange-Traded Futures Contracts | United States Contracts    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ 0 $ 0