XML 48 R32.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Accounting Policies [Abstract] |
Summary of Percentage of Product Revenues and Accounts Receivable | The following is a summary of the percentage of product revenues and accounts receivable from the Company's customers with a percentage of net sales greater than 10 percent:
|  | Percentage of Total Product Revenues |  |  | Percentage of Total Net Accounts Receivable |
|  | Year Ended December 31, |  |  | Year Ended December 31, |
|  | 2024 |  |  | 2023 |  |  | 2022 |  |  | 2024 |  |  | 2023 |
Lear |  |  | 16 | % |  |  | 15 | % |  |  | 16 | % |  |  | 16 | % |  |  | 17 | %
Adient |  |  | 11 | % |  |  | 13 | % |  |  | 15 | % |  |  | 11 | % |  |  | 19 | %
Estimated Useful Lives of Property and Equipment | Depreciation is computed using the straight-line method. The estimated useful lives of the Company’s property and equipment are as follows:
Asset Category |  | Useful Life
Buildings and improvements |  | 1 to 30 years
Plant and equipment |  | 10 years
Production tooling |  | 2 to 10 years
Leasehold improvements |  | Term of lease
Information technology |  | 1 to 5 years
Fair Value and Corresponding Useful Lives for Acquired Intangibles Assets | Amortization of other intangible assets is computed using the straight-line method. The fair value and corresponding useful lives for acquired intangible assets are listed below as follows:
Asset Category |  | Useful Life
Customer relationships |  | 8 to 15 years
Technology |  | 5 to 12 years
Product development costs |  | 5 to 10 years
Trade names |  | Indefinite
Software development costs |  | 4 to 5 years

X
- Definition Schedule of useful life of property and equipment table. + References No definition available. + Details
Name: | thrm_ScheduleOfUsefulLifeOfPropertyAndEquipmentTableTextBlock
Namespace Prefix: | thrm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
Name: | us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration