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Employee Service Share-based Compensation, unvested Awards, Compensation Cost Not yet Recognized, Total.

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Estimated fairvalue of market price of ADS granted

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Amount of compensation expense on cancelled options.

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The maximum number of share options authorized for grant in a share-based payment arrangement.

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Percentage of restricted stock units

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amount of cash settle by ordinary shares

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amount of cash settle by ordinary shares

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amount of cash settle by ordinary shares

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- Definition

Company settle RSU shares by shares.

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Restricted stock unit settled by cash.

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- Definition

Percentage of vesting of share-based compensation awards.

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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).

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Share based compensation contractual life

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- Definition

share based compensation vesting period

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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
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- Definition

The exercise price of share options granted.

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- Definition

The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions]

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- Definition

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

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The number of share options exercised in a share-based payment arrangement.

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The number of share options expired in a share-based payment arrangement.

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The number of share options forfeited in a share-based payment arrangement.

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The number of share options granted in a share-based payment arrangement.

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The weighted average exercise price of share options expired in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average exercise price of share options forfeited in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average exercise price of share options granted in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

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Share-Based Compensation - Additional information (Details)																	12 Months Ended
	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