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Inventories (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [abstract] |
Summary of Inventories |
|  | December 31, 2019 |
|  | Cost |  |  | Allowance for impairment losses |  |  | Carrying amount |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Raw materials |  |  | 1,831,140 |  |  |  | (63,498 | ) |  |  | 1,767,642 |
|  | December 31, 2020 |
|  | Cost |  |  | Allowance for impairment losses |  |  | Carrying amount |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Raw materials |  |  | 2,181,890 |  |  |  | (79,815 | ) |  |  | 2,102,075 |
Cost of Inventories Recognized as an Expense | The cost of inventories recognized as an expense for the year:
|  | Year ended December 31, |
|  | 2018 |  |  | 2019 |  |  | 2020 |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |
Cost of revenue |  |  | 15,057,605 |  |  |  | 16,372,032 |  |  |  | 17,957,568 |
Loss on abandonment |  |  | 5,497 |  |  |  | 12,369 |  |  |  | 5,323 |
Allowance for (reversal of ) inventory valuation and obsolescence loss |  |  | (13,070 | ) |  |  | 27,341 |  |  |  | 16,317 |
|  |  | 15,050,032 |  |  |  | 16,411,742 |  |  |  | 17,979,208 |

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