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Accounts receivable - Summary of Accounts and notes receivable (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Jan. 01, 2023
TWD ($)
Disclosure of financial assets [Line Items]        
Accounts receivable $ 5,010,154 $ 152,795 $ 5,326,381  
Accounts receivable [member]        
Disclosure of financial assets [Line Items]        
Accounts receivable 5,011,644   5,328,835 $ 4,381,563
Loss allowance [member]        
Disclosure of financial assets [Line Items]        
Accounts receivable $ (1,490)   $ (2,454)