XML 163 R71.htm IDEA: XBRL DOCUMENT v3.20.1

Significant accounting policies - Additional Information (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
IFRS Statement [Line Items]
Plant And Equipment Useful Life	3 years
Weighted Average Basic Number of ADS Equivalent Outstanding	172,550	172,510	172,425
Weighted Average Diluted Number of ADS Equivalent Outstanding	172,550	172,534	172,452
Driver IC CGU [Member]
IFRS Statement [Line Items]
Discount rate applied to cash flow projections	13.30%	13.59%
WLO CGU [Member]
IFRS Statement [Line Items]
Discount rate applied to cash flow projections	16.07%	14.34%
Growth rate used to extrapolate cash flow projections	2.04%	2.08%
Period for average Taiwan economic growth rate	5 years
Technology
IFRS Statement [Line Items]
Assets Acquired Useful Life	7 years
Patent [Member]
IFRS Statement [Line Items]
Assets Acquired Useful Life	15 years
Intellectual Properties [Member]
IFRS Statement [Line Items]
Assets Acquired Useful Life	10 years
Himax semi conductor [Member]
IFRS Statement [Line Items]
Goodwill recognised as of acquisition date	$ 26,846
Himax Display Inc [Member]
IFRS Statement [Line Items]
Goodwill recognised as of acquisition date	$ 1,292
Buildings
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	25 years
Building improvements | Bottom of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	4 years
Building improvements | Top of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	16 years
Machinery | Bottom of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	4 years
Machinery | Top of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	6 years
Research and development equipment | Bottom of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	2 years
Research and development equipment | Top of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	6 years
Office furniture and equipment [Member] | Bottom of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	3 years
Office furniture and equipment [Member] | Top of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	8 years
Others | Bottom of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	2 years
Others | Top of range [member]
IFRS Statement [Line Items]
Useful Life Of Tangible Assets	10 years
Software
IFRS Statement [Line Items]
Discount rate applied to cash flow projections	13.14%	14.58%
Growth rate used to extrapolate cash flow projections	2.04%	2.08%
Period for average Taiwan economic growth rate	5 years
Software | Bottom of range [member]
IFRS Statement [Line Items]
Assets Acquired Useful Life	2 years
Useful Life Of Tangible Assets	2 years
Software | Top of range [member]
IFRS Statement [Line Items]
Assets Acquired Useful Life	3 years
Useful Life Of Tangible Assets	15 years

X

- Definition

The estimated Useful life of acquired intangible assets

+ References

No definition available.

+ Details

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

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Definition

The period for average Taiwan economic growth rate.

+ References

No definition available.

+ Details

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

X

- Definition

It Represents The Property Plant And Equipment Useful Life

+ References

No definition available.

+ Details

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

X

- Definition

The estimated Useful life of tangible assets

+ References

No definition available.

+ Details

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

X

- Definition

The number of weighted average basic number of ADS equivalent shares outstanding.

+ References

No definition available.

+ Details

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

X

- Definition

The number of weighted average diluted number of ADS equivalent shares outstanding.

+ References

No definition available.

+ Details

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

X

- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2019-01-01
-Paragraph 134
-Subparagraph d
-Clause v
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_d_v&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2019-01-01
-Paragraph 134
-Subparagraph e
-Clause v
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_e_v&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2019-01-01
-Paragraph 134
-Subparagraph d
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_d_iv&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2019-01-01
-Paragraph 134
-Subparagraph e
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_e_iv&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The amount recognised as of the business combination's acquisition date for goodwill. [Refer: Goodwill; Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 3
-IssueDate 2019-01-01
-Paragraph B64
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B64&doctype=Appendix&subtype=B
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 3
-IssueDate 2019-01-01
-Paragraph IE72
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_IE72&doctype=Illustrative%20Examples
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_GoodwillRecognisedAsOfAcquisitionDate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=himx_DriverICCGUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_IndividualAssetsOrCashgeneratingUnitsWithSignificantAmountOfGoodwillOrIntangibleAssetsWithIndefiniteUsefulLivesAxis=himx_WLOCGUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_TechnologybasedIntangibleAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=himx_PatentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=himx_IntellectualPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	himx_LegalEntityAxisAxis=himx_HimaxSemiConductorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	himx_LegalEntityAxisAxis=himx_HimaxDisplayIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_BuildingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=himx_BuildingsImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_MachineryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=himx_ResearchAndDevelopmentEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_FixturesAndFittingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ComputerSoftwareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: