DisclosureOfShareBasedPaymentArrangementsExplanatory

No definition available.

Name:	himx_DisclosureOfShareBasedPaymentArrangementsExplanatoryLineItems
Namespace Prefix:	himx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

Name:	himx_EmployeeServiceShareBasedCompensationUnvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Estimated fairvalue of market price of ADS granted

+ References

No definition available.

+ Details

Name:	himx_EstimatedFairvalueMarketPriceOfADS
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of expense from share-based payment transactions with non controlling interests.

+ References

No definition available.

+ Details

Name:	himx_ExpenseFromSharebasedPaymentTransactionsForNoncontrollingInterests
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of restricted stock units

+ References

No definition available.

+ Details

Name:	himx_PercentageOfRestrictedstockUnitsGrantVested
Namespace Prefix:	himx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

amount of cash settle by ordinary shares

+ References

No definition available.

+ Details

Name:	himx_PercentageOfVestedSettledByOrdinarySharesOne
Namespace Prefix:	himx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

amount of cash settle by ordinary shares

+ References

No definition available.

+ Details

Name:	himx_PercentageOfVestedSettledByOrdinarySharesThree
Namespace Prefix:	himx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

amount of cash settle by ordinary shares

+ References

No definition available.

+ Details

Name:	himx_PercentageOfVestedSettledByOrdinarySharesTwo
Namespace Prefix:	himx_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Company settle RSU shares by shares.

+ References

No definition available.

+ Details

Name:	himx_RestrictedStockUnitsSettleByShares
Namespace Prefix:	himx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Restricted stock unit settled by cash.

+ References

No definition available.

+ Details

Name:	himx_RestrictedStockUnitsSettledByCash
Namespace Prefix:	himx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of vesting of share-based compensation awards.

+ References

No definition available.

+ Details

Name:	himx_ShareBasedCompensationArrangementVestingRightsPercentage
Namespace Prefix:	himx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	himx_ShareBasedCompensationNoOfSharesAuthorized
Namespace Prefix:	himx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum number of american depositary shares originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan.

+ References

No definition available.

+ Details

Name:	himx_ShareBasedCompensationNumberOfAmericanDepositaryShareAuthorized
Namespace Prefix:	himx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of american depositary shares originally granted for stock options.

+ References

No definition available.

+ Details

Name:	himx_ShareBasedCompensationNumberOfAmericanDepositaryShareGranted
Namespace Prefix:	himx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	himx_ShareBasedCompensationRiskFreeInterestRateExpectedTerm
Namespace Prefix:	himx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Share based compensation contractual life

+ References

No definition available.

+ Details

Name:	himx_ShareOptionsContractualLife
Namespace Prefix:	himx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

share based compensation vesting period

+ References

No definition available.

+ Details

Name:	himx_ShareOptionsVestingPeriod
Namespace Prefix:	himx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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: Share-based payment arrangements [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_DecreaseIncreaseThroughTaxOnSharebasedPaymentTransactions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The exercise price of share options granted.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 47
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ExercisePriceShareOptionsGranted2019
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of expense from share-based payment transactions with employees.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-Subparagraph b
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_iv&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-Subparagraph b
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_ii&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2020-01-01

+ Details

Name:	ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ComponentsOfEquityAxis=himx_RestrictedStockUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_LegalEntitiesAxis=himx_HimaxImagingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_LegalEntitiesAxis=himx_ImagingTaiwanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOprtionPlanNameAxis=himx_StockOption2016PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOptionVestingAxis=himx_OneAndHalfYearsAfterGrantDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOptionVestingAxis=himx_ThreeYearsAfterGrantDateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_IssuerEquityTypeAxis=himx_ROCCentarlGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOprtionPlanNameAxis=himx_StockOption2015PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_LegalEntitiesAxis=himx_HimaxDisplayMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOprtionPlanNameAxis=himx_StockOption2019PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	himx_StockOprtionPlanNameAxis=himx_EmployeeStockOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Share-Based Compensation - Additional Information (Details)															12 Months Ended
	Sep. 28, 2020 USD ($)	Sep. 25, 2020 $ / shares shares	Aug. 11, 2020 $ / shares shares	Mar. 31, 2020 $ / shares shares	Sep. 23, 2019 shares	Sep. 26, 2018 USD ($)	Sep. 29, 2017 USD ($)	Sep. 28, 2016 USD ($)	Jan. 01, 2016	Jan. 01, 2016 TWD ($)	Jan. 01, 2016	Oct. 06, 2015 $ / shares shares	Oct. 06, 2015 $ / shares shares	Sep. 25, 2015 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation No Of Shares Authorized \| shares												2,528,000	2,528,000
Exercise price, share options granted \| (per share)												$ 65	$ 1.986
Weighted average exercise price, Granted \| $ / shares															$ 3.05	$ 2.27
Compensation expenses															$ 8,000	$ 5,000		$ 22,000
Estimated fairvalue market price of ADS	$ 3.44					$ 5.76	$ 10.93	$ 8.30						$ 7.92
Restricted stock unit settle by shares \| shares															16,302	77,756	82,814	82,814
Number of share options granted in share-based payment arrangement															163,500	2,226,690
Number of share options exercised in share-based payment arrangement															(1,574,869)
Weighted average remaining contractual life of outstanding share options															6 months 15 days	1 year 6 months
Compensation Cost Not Yet Recognized															$ 89,000
Ordinary shares [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
percentage of vested settled by ordinary shares One																						0.44		0.95	1.03	2.69
percentage of vested settled by ordinary shares Two																					0.44		0.95	1.03	2.69
percentage of vested settled by ordinary shares Three																				0.44		0.95	1.03	2.69
Restricted stock units [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Number of other equity instruments granted in share-based payment arrangement	1,402,714					676,273	580,235	1,208,785						597,596	1,402,714			676,273
Percentage of restrictedstock units grant vested	98.68					97.15	96.91	91.93						94.15
percentage of vested settled by ordinary shares One																											1.95
percentage of vested settled by ordinary shares Two																										1.95
percentage of vested settled by ordinary shares Three																									1.95
Weighted average remaining contractual life of outstanding share options															2 years 4 months 13 days
Restricted stock units settled by cash	$ 4,762,000					$ 3,778,000	$ 6,147,000	$ 9,223,000						$ 4,456,000
Himax Imaging [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Number of share options granted in share-based payment arrangement											1,760,000
Number of share options exercised in share-based payment arrangement										30	0.9139
Imaging Taiwan [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Weighted average exercise price, Granted \| $ / shares																$ 0.0000		$ 0.0000
Number of share options granted in share-based payment arrangement																0		0
Number of share options exercised in share-based payment arrangement																0		0
Weighted average remaining contractual life of outstanding share options															0 years	0 years		1 year	2 years
Stock Option 2016 Plan [Member] \| Himax Imaging [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Options Contractual Life									4 years
Share Options Vesting period									3 years
Stock Option 2016 Plan [Member] \| Himax Imaging [Member] \| One And Half Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage											50.00%
Stock Option 2016 Plan [Member] \| Himax Imaging [Member] \| Three Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage											50.00%
Stock Option 2016 Plan [Member] \| Himax Imaging [Member] \| ROC Centarl Government [Member] \| Bottom of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															2 years
Stock Option 2016 Plan [Member] \| Himax Imaging [Member] \| ROC Centarl Government [Member] \| Top of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															5 years
Stock Option 2016 Plan [Member] \| Imaging Taiwan [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Options Vesting period																		3 years
Share Based Compensation No Of Shares Authorized \| shares																	2,040,000	2,040,000
Exercise price, share options granted \| (per share)																	$ 30	$ 0.9139
Stock Option 2016 Plan [Member] \| Imaging Taiwan [Member] \| One And Half Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage											50.00%
Stock Option 2016 Plan [Member] \| Imaging Taiwan [Member] \| Three Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage											50.00%
Stock Option 2016 Plan [Member] \| Imaging Taiwan [Member] \| ROC Centarl Government [Member] \| Bottom of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															2 years
Stock Option 2016 Plan [Member] \| Imaging Taiwan [Member] \| ROC Centarl Government [Member] \| Top of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															5 years
Stock Option 2015 Plan [Member] \| Himax Display [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Options Contractual Life												4 years	4 years
Share Options Vesting period												3 years	3 years
Expense from share-based payment transactions for non controlling interests																$ 0		$ 115,000
Stock Option 2015 Plan [Member] \| Himax Display [Member] \| One And Half Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage												50.00%	50.00%
Stock Option 2015 Plan [Member] \| Himax Display [Member] \| Three Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage												50.00%	50.00%
Stock Option 2015 Plan [Member] \| Himax Display [Member] \| ROC Centarl Government [Member] \| Bottom of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															2 years
Stock Option 2015 Plan [Member] \| Himax Display [Member] \| ROC Centarl Government [Member] \| Top of range [member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Risk Free Interest Rate Expected Term															5 years
Stock Option 2019 Plan [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Options Contractual Life					2 years
Share Based Compensation Risk Free Interest Rate Expected Term															1 year	1 year 6 months
Number of ADS authorized \| shares					3,000,000
Number of ADS per stock options granted \| shares		10,000	39,000	114,500	6,000,000
Weighted average exercise price, Granted \| $ / shares		$ 3.35	$ 3.90	$ 2.74
Compensation expenses															$ 570,000	$ 326,000
Income tax benefits															103,000	$ 59,000
Number of share options granted in share-based payment arrangement		10,000	39,000	114,500
Stock Option 2019 Plan [Member] \| One And Half Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage					50.00%
Stock Option 2019 Plan [Member] \| Three Years After Grant Date [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Share Based Compensation Vesting Rights Percentage					50.00%
Employee Stock Options [Member]
Disclosure Of Share Based Payment Arrangements Explanatory [Line Items]
Compensation expenses															122,000
Income tax benefits															$ 29,000