XML 44 R45.htm IDEA: XBRL DOCUMENT v3.20.1

Segment Reporting - Segment Information About Reported Segment Product Revenues by Product Category (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Product revenues	$ 228,613	$ 257,921
Automotive Segments
Segment Reporting Information [Line Items]
Product revenues	216,472	242,357
Automotive Segments | Climate Control Seats (CCS)
Segment Reporting Information [Line Items]
Product revenues	82,528	94,354
Automotive Segments | Seat Heaters
Segment Reporting Information [Line Items]
Product revenues	64,532	73,920
Automotive Segments | Automotive Cables
Segment Reporting Information [Line Items]
Product revenues	22,140	23,749
Automotive Segments | Steering Wheel Heaters
Segment Reporting Information [Line Items]
Product revenues	19,235	16,970
Automotive Segments | Battery Thermal Management (BTM)
Segment Reporting Information [Line Items]
Product revenues	11,209	10,745
Automotive Segments | Electronics
Segment Reporting Information [Line Items]
Product revenues	10,376	12,852
Automotive Segments | Other Automotive
Segment Reporting Information [Line Items]
Product revenues	6,452	9,767
Industrial Segments
Segment Reporting Information [Line Items]
Product revenues	12,141	15,564
Industrial Segments | Medical
Segment Reporting Information [Line Items]
Product revenues	$ 12,141	8,187
Industrial Segments | GPT
Segment Reporting Information [Line Items]
Product revenues		3,959
Industrial Segments | CSZ-IC
Segment Reporting Information [Line Items]
Product revenues		$ 3,418

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=thrm_AutomotiveSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_ClimateControlSeatsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_SeatHeatersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_AutomotiveCablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_SteeringWheelHeatersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_BatteryThermalManagementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_ElectronicsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_OtherAutomotiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=thrm_IndustrialSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_MedicalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_GenthermGlobalPowerTechnologiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=thrm_CincinnatiSubZeroIndustrialChamberBusinessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: