v3.26.1
FAIR VALUE OF FINANCIAL INSTRUMENTS - UNL's Securities Fair Value Hierarchy (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
US    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ (1,632,825) $ (2,070,955)
Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value 12,000,000 8,000,000
Level 1 | US    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value (1,632,825) (2,070,955)
Level 1 | Short-Term Investments    
FAIR VALUE OF FINANCIAL INSTRUMENTS    
Securities, fair value $ 12,000,000 $ 8,000,000