XML 37 R37.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Revenue Recognition (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Revenue Recognition And Deferred Revenue [Abstract] |
Schedule of Unearned Revenue by Segment | Unearned revenue by segment was as follows:
|  | December 31, 2019 |  |  | December 31, 2018 |
Automotive |  | $ | 579 |  |  | $ | 1,597 |
Industrial |  |  | — |  |  |  | — |
Total |  | $ | 579 |  |  | $ | 1,597 |
Schedule of Changes in Unearned Revenue | Changes in unearned revenue for the year ended December 31, 2019 were as follows:
Balance, beginning of period |  | $ | 1,597 |
Additions to unearned revenue |  |  | 234 |
Reclassified to revenue |  |  | (1,238 | )
Currency impacts |  |  | (14 | )
Balance, end of period |  | $ | 579 |

X
- Definition Schedule of changes in unearned revenue. + References No definition available. + Details
Name: | thrm_ScheduleOfChangesInUnearnedRevenueTableTextBlock
Namespace Prefix: | thrm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of unearned revenue by segment. + References No definition available. + Details
Name: | thrm_ScheduleOfUnearnedRevenueBySegmentTableTextBlock
Namespace Prefix: | thrm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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