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Share-Based Compensation - Additional information (Details) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |
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Sep. 28, 2024 $ / shares | Sep. 26, 2024 USD ($) | Dec. 28, 2023 $ / shares shares | Dec. 28, 2023 $ / shares shares | Sep. 28, 2023 $ / shares | Sep. 26, 2023 USD ($) | Sep. 28, 2022 USD ($) $ / shares | Jan. 28, 2022 $ / shares shares | Sep. 28, 2021 USD ($) $ / shares | Jun. 29, 2021 | Jun. 28, 2021 $ / shares shares | Jun. 28, 2021 $ / shares shares | Mar. 19, 2021 $ / shares shares | Mar. 19, 2021 $ / shares shares | Sep. 28, 2020 USD ($) $ / shares | Mar. 01, 2019 | Dec. 31, 2024 USD ($) shares $ / shares | Dec. 31, 2023 USD ($) shares $ / shares | Dec. 31, 2022 USD ($) shares $ / shares | Dec. 31, 2021 | Sep. 30, 2027 | Sep. 30, 2026 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2021
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation risk free interest rate expected term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |  |  |  |
Restricted share units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expenses | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,239,000 | $ 12,063,000 | $ 20,000,000 |  |  |  |  |  |  |  |
Number of RSUs granted in share-based payment arrangement |  | 2,014,386 |  |  |  | 1,710,607 | 3,987,509 |  | 2,604,545 |  |  |  |  |  | 1,402,714 |  | 2,014,386 | 1,710,607 | 3,987,509 |  |  |  |  |  |  |  |
Percentage of restricted stock units grant vested |  | 96.76 |  |  |  | 97.45 | 86.41 |  | 85.63 |  |  |  |  |  | 98.68 |  |  |  |  |  |  |  |  |  |  |  |
percentage of vested settled by ordinary shares one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.08 | 0.85 | 4.53 | 4.79 | 0.44
percentage of vested settled by ordinary shares two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.08 | 0.85 | 4.53 | 4.79 | 0.44 |
percentage of vested settled by ordinary shares three |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.08 | 0.85 | 4.53 | 4.79 | 0.44 |  |
Estimated fairvalue market price of ADS | $ / shares | 5.68 |  |  |  | 5.68 |  | 5.09 |  | 10.39 |  |  |  |  |  | 3.44 |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock unit settle by shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 624,670 | 615,052 | 235,910 |  |  |  |  |  |  |  |
Weighted average remaining contractual life of unvested RSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 3 months 29 days |  |  |  |  |  |  |  |  |  |
Compensation Cost Not Yet Recognized | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 758,000 |  |  |  |  |  |  |  |  |  |
Restricted stock units settled by cash | $ |  | $ 11,071,000 |  |  |  | $ 9,468,000 | $ 17,535,000 |  | $ 23,174,000 |  |  |  |  |  | $ 4,762,000 |  |  |  |  |  |  |  |  |  |  |  |
Emza |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price, Granted | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20.49 |  |  |  |  |  |  |  |
Number of share granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 150,940 |  |  |  |  |  |  |  |
Number of units/shares, Forfeited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,797) |  |  |  |  |  |  |  |
Weighted average exercise price, Forfeited | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20.49 |  |  |  |  |  |  |  |
Weighted average exercise price, Expired | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20.49 |  |  |  |  |  |  |  |
Number of units/shares, Cancelled |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (149,143) |  |  |  |  |  |  |  |
Liqxtal Technology Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expenses | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 33,000 |  |  |  |  |  |  |  |
Stock Option 2016 Plan | Imaging Taiwan | One And Half Years After Grant Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Vesting Rights Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |
Stock Option 2016 Plan | Imaging Taiwan | Three Years After Grant Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Vesting Rights Percentage |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Option 2016 Plan | Himax Imaging |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share options contractual life |  |  |  |  |  |  |  |  |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |
Share options vesting period |  |  |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options 2021 plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation no of shares authorized |  |  |  |  |  |  |  | 179,690 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted | $ / shares |  |  |  |  |  |  |  | $ 20.49 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options 2021 plan | CMVT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average exercise price, Granted | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.32 | $ 0.33 |  |  |  |  |  |  |  |  |
Compensation expenses | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 79,000 | $ 69,000 | 76,000 |  |  |  |  |  |  |  |
Income tax benefits | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 |  |  |  |  |  |  |  |
Number of share granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,201,000 | 288,000 |  |  |  |  |  |  |  |  |
Maximum number of shares authorized for grant |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 | 3,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted | (per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 10 | $ 0.36 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units/shares, Forfeited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (138,000) |  | (380,000) |  |  |  |  |  |  |  |
Weighted average exercise price, Forfeited | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.47 |  | $ 0.36 |  |  |  |  |  |  |  |
Weighted average remaining contractual life of unvested RSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 9 months 18 days | 1 year 6 months | 2 years 6 months | 3 years 6 months |  |  |  |  |  |  |
Stock options 2021 plan | CMVT | ROC Central Government | Bottom of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation risk free interest rate expected term |  |  |  |  |  |  |  |  |  |  |  |  | 2 years | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options 2021 plan | CMVT | ROC Central Government | Top of range |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation risk free interest rate expected term |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options 2021 plan | Liqxtal Technology Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share options contractual life |  |  |  |  |  |  |  |  |  | 1 year 6 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share options vesting period |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation no of shares authorized |  |  |  |  |  |  |  |  |  |  | 1,000,000 | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 840,000 |  |  |  |  |  |  |  |
Exercise price, share options granted | (per share) |  |  |  |  |  |  |  |  |  |  | $ 18 | $ 0.65 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units/shares, Forfeited |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (70,000) |  |  |  |  |  |  |  |
Weighted average exercise price, Forfeited | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.65 |  |  |  |  |  |  |  |
Weighted average remaining contractual life of unvested RSUs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |  |
Stock options 2021 plan | Liqxtal Technology Inc | One Years After Grant Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Vesting Rights Percentage |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options 2021 plan | Liqxtal Technology Inc | ROC Central Government |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share based compensation risk free interest rate expected term |  |  |  |  |  |  |  |  |  |  | 2 years | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock option 2022 plan | Emza Visual Sense Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share options vesting period |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation expenses | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 522,000 |  |  |  |  |  |  |  |  |  |
Compensation expenses on cancelled options | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 219,000 |  |  |  |  |  |  |  |  |  |
Income tax benefits | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |  |
Stock option 2022 plan | Emza Visual Sense Ltd | One Years After Grant Date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Vesting Rights Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Stock option 2022 plan | Emza Visual Sense Ltd | 12 equal portions at the end of each 3-month period thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Based Compensation Vesting Rights Percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  |  |  |  |  |  |  |
Stock option 2023 plan | CMVT |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-Based Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum number of shares authorized for grant |  |  | 1,500,000 | 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price, share options granted | (per share) |  |  | $ 10 | $ 0.32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References No definition available. + Details
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- Definition The decrease (increase) in equity resulting from tax on transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Types of share-based payment arrangements [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 106 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_106_d&doctype=Standard -URIDate 2024-03-27 + Details
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