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Accounts receivable - Summary of Accounts and notes receivable (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Jan. 01, 2020 TWD ($)
--- | --- | --- | --- | ---
Disclosure of financial assets [Line Items] |  |  |  |
Accounts receivable | $ 6,344,246 | $ 228,704 | $ 5,364,156 |
Accounts receivable [member] |  |  |  |
Disclosure of financial assets [Line Items] |  |  |  |
Accounts receivable | 6,346,156 |  | 5,365,776 | $ 4,452,904
Loss allowance [member] |  |  |  |
Disclosure of financial assets [Line Items] |  |  |  |
Accounts receivable | $ (1,910) |  | $ (1,620) |

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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