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Accounts receivable - Summary of Accounts and notes receivable (Detail)
$ in Thousands, $ in Thousands
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Jan. 01, 2021
TWD ($)
Disclosure of financial assets [Line Items]        
Accounts receivable $ 4,381,563 $ 142,582 $ 6,344,246  
Accounts receivable [member]        
Disclosure of financial assets [Line Items]        
Accounts receivable 4,384,232   6,346,156 $ 5,364,156
Loss allowance [member]        
Disclosure of financial assets [Line Items]        
Accounts receivable $ (2,669)   $ (1,910)