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FAIR VALUE OF FINANCIAL INSTRUMENTS - UNL's Securities Fair Value Hierarchy (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
US |  |
FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Securities, fair value | $ (814,334) | $ 1,115,220
Short-Term Investments |  |
FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Securities, fair value | 7,000,000 | 11,000,000
Level 1 | US |  |
FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Securities, fair value | (814,334) | 1,115,220
Level 1 | Short-Term Investments |  |
FAIR VALUE OF FINANCIAL INSTRUMENTS |  |
Securities, fair value | $ 7,000,000 | $ 11,000,000

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