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Details of Significant Accounts - Intangible assets, schedule of amortization on intangible assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets $ 75 $ 63 $ 47
Research and development expenses      
Disclosure of detailed information about intangible assets [line items]      
Amortization of intangible assets $ 75 $ 63 $ 47