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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
FAIR VALUE MEASUREMENTS    
Transfer into Level 3, Liabilities $ 0 $ 0
Transfer from Level 3, Liabilities 0 0
Transfer into Level 3, Assets 0 0
Transfer from Level 3, Assets $ 0 $ 0