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FAIR VALUE MEASUREMENT - Sponsor Loan Measurement (Details) - CONCORD ACQUISITION CORP III - Sponsor Loans - Level 3 - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
FAIR VALUE MEASUREMENT      
Fair Value   $ 1,000,000 $ 5,490,000
Unpaid Principal Balance $ 6,900,000 $ 6,900,000