XML 72 R52.htm IDEA: XBRL DOCUMENT
v3.20.2

Goodwill and Other Intangibles - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 6 Months Ended
--- | --- | --- | ---
Jun. 19, 2020 | Feb. 28, 2020 | Jun. 30, 2020
Goodwill And Other Intangible Assets [Line Items] |  |  |
Gain on sale of intangible assets |  |  | $ 1,978
Patents and Intellectual Property |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Proceeds from sale of intangible assets | $ 2,055 |  |
Patents and Intellectual Property | Other Income |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Gain on sale of intangible assets | $ 1,978 |  |
Development Stage Technology Company |  |  |
Goodwill And Other Intangible Assets [Line Items] |  |  |
Automotive patents and technology acquired |  | $ 3,141 |
Defensive intangible assets, useful life |  | 6 years |

X
- Definition Goodwill and Other Intangible Assets. + References No definition available. + Details
Name: | thrm_GoodwillAndOtherIntangibleAssetsLineItems
Namespace Prefix: | thrm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainLossOnDispositionOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow from disposal of asset without physical form usually arising from contractual or other legal rights, excluding goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=thrm_PatentsAndIntellectualPropertyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_OtherIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=thrm_DevelopmentStageTechnologyCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |