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Capital surplus (Tables) | 12 Months Ended
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Dec. 31, 2021
Text block [abstract] |
Summary of Capital Surplus |
|  | 2019 |
|  | Share premium |  |  | Employee restricted shares |  |  | Others |  |  | Total |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |  |  | NT$000 |
January 1 |  |  | 5,873,743 |  |  |  | 382,506 |  |  |  | 7,304 |  |  |  | 6,263,553 |
Share-based payments |  |  | — |  |  |  | (412 | ) |  |  | — |  |  |  | (412 | )
Cancellation of treasury stock |  |  | (199,501 | ) |  |  | (12,853 | ) |  |  | — |  |  |  | (212,354 | )
December 31 |  |  | 5,674,242 |  |  |  | 369,241 |  |  |  | 7,304 |  |  |  | 6,050,787 |
|  | 2020 |
|  | Share premium |  |  | Employee restricted shares |  |  | Others |  |  | Total |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |  |  | NT$000 |
January 1 |  |  | 5,674,242 |  |  |  | 369,241 |  |  |  | 7,304 |  |  |  | 6,050,787 |
Reclassifications |  |  | 369,241 |  |  |  | (369,241 | ) |  |  | — |  |  |  | — |
December 31 |  |  | 6,043,483 |  |  |  | — |  |  |  | 7,304 |  |  |  | 6,050,787 |
|  | 2021 |
|  | Share premium |  |  | Employee restricted shares |  |  | Others |  |  | Total |
|  | NT$000 |  |  | NT$000 |  |  | NT$000 |  |  | NT$000 |
January 1 |  |  | 6,043,483 |  |  |  | — |  |  |  | 7,304 |  |  |  | 6,050,787 |
Changes in associates accounted for using equity method |  |  | — |  |  |  | — |  |  |  | 4,834 |  |  |  | 4,834 |
December 31 |  |  | 6,043,483 |  |  |  | — |  |  |  | 12,138 |  |  |  | 6,055,621 |

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- Definition Components capital surplus. + References No definition available. + Details
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- Definition Text block [abstract] + References No definition available. + Details
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Period Type: | duration