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DEFINED CONTRIBUTION PENSION - Pension cost (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
DEFINED CONTRIBUTION PENSION    
Total $ 155 $ 160
Research and development    
DEFINED CONTRIBUTION PENSION    
Total 90 108
Selling, general and administrative    
DEFINED CONTRIBUTION PENSION    
Total $ 65 $ 52