Overview	12 Months Ended
Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Overview	Note 1 — Overview Gentherm Incorporated, a Michigan corporation, and its consolidated subsidiaries (“Gentherm”, “we”, “us”, “our” or the “Company”) is a global developer, manufacturer and marketer of innovative thermal management technologies for a broad range of heating, cooling and temperature control applications, primarily in the automotive and medical industries. Within the automotive industry, our products provide solutions for passenger climate comfort and convenience, battery thermal management and cell connecting systems. Within the medical industry our products provide patient temperature management solutions. Our automotive products can be found on vehicles manufactured by nearly all the major automotive original equipment manufacturers (“OEMs”) operating in North America and Europe, and several major OEMs in Asia. We operate in locations aligned with our major customers’ product strategies to provide locally enhanced design, integration and production capabilities. The Company is also developing a number of new technologies and products that are expected to enable improvements to existing products and to create new product applications for existing and new markets. Impact of COVID-19, Supply Chain Disruptions and Other Matters The COVID-19 pandemic that began around December 2019 introduced significant volatility to the global economy, disrupted supply chains and had a widespread adverse effect on the global automotive industry in the first half of 2020, with various direct and indirect adverse impacts continuing throughout 2021. Beginning in February 2020 and continuing into June 2020, substantially all of the Company’s major OEM and Tier 1 customers temporarily ceased or significantly reduced production as a result of restrictions that were requested or mandated by governmental authorities. As a result, substantially all of our manufacturing facilities either temporarily suspended production or experienced significant reductions in volumes during this period. By the end of the second quarter of 2020, the Company had reopened all of its manufacturing facilities, in line with industry demand, and in accordance with local government requirements. Although global automotive industry production has improved relative to the first half of 2020, production remains below recent historic levels. The lingering impacts of COVID-19 into 2021 has impeded global supply chains, resulted in longer lead times and delays in procuring component parts and raw materials, and resulted in inflationary cost increases in certain raw materials, labor and transportation. These broad-based inflationary impacts have negatively impacted the Company’s financial condition, results of operations and cash flows for the fiscal year ended December 31, 2021. Supply shortages of semiconductor chips and other components have resulted in decreases in global automotive vehicle production and significant volatility in customer vehicle production schedules. The Company's semiconductor suppliers, along with most automotive component supply companies that use semiconductors, including Gentherm, have been unable to fully meet the vehicle production demands of the OEMs due to events which are outside the Company's control, including but not limited to, the COVID-19 pandemic, the global semiconductor shortage, fires at suppliers’ facilities, significant weather events impacting semiconductor supplier facilities in the southern United States, and other extraordinary events. In response to the global supply chain instability and inflationary cost increases the Company has taken several actions to minimize any potential and actual adverse impacts by working with its suppliers and customers to closely monitor the availability of semiconductor microchips and other component parts and raw materials, customer vehicle production schedules and any other supply chain inefficiencies that may arise. The consequences of the pandemic and adverse impact to the global economy continue to evolve. Accordingly, the future adverse impact on our business and financial statements remains subject to significant uncertainty as of the date of this filing.

Overview

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Note 1 — Overview

Gentherm Incorporated, a Michigan corporation, and its consolidated subsidiaries (“Gentherm”, “we”, “us”, “our” or the “Company”) is a global developer, manufacturer and marketer of innovative thermal management technologies for a broad range of heating, cooling and temperature control applications, primarily in the automotive and medical industries. Within the automotive industry, our products provide solutions for passenger climate comfort and convenience, battery thermal management and cell connecting systems. Within the medical industry our products provide patient temperature management solutions. Our automotive products can be found on vehicles manufactured by nearly all the major automotive original equipment manufacturers (“OEMs”) operating in North America and Europe, and several major OEMs in Asia. We operate in locations aligned with our major customers’ product strategies to provide locally enhanced design, integration and production capabilities. The Company is also developing a number of new technologies and products that are expected to enable improvements to existing products and to create new product applications for existing and new markets.

Impact of COVID-19, Supply Chain Disruptions and Other Matters

The COVID-19 pandemic that began around December 2019 introduced significant volatility to the global economy, disrupted supply chains and had a widespread adverse effect on the global automotive industry in the first half of 2020, with various direct and indirect adverse impacts continuing throughout 2021.

Beginning in February 2020 and continuing into June 2020, substantially all of the Company’s major OEM and Tier 1 customers temporarily ceased or significantly reduced production as a result of restrictions that were requested or mandated by governmental authorities. As a result, substantially all of our manufacturing facilities either temporarily suspended production or experienced significant reductions in volumes during this period. By the end of the second quarter of 2020, the Company had reopened all of its manufacturing facilities, in line with industry demand, and in accordance with local government requirements. Although global automotive industry production has improved relative to the first half of 2020, production remains below recent historic levels.

The lingering impacts of COVID-19 into 2021 has impeded global supply chains, resulted in longer lead times and delays in procuring component parts and raw materials, and resulted in inflationary cost increases in certain raw materials, labor and transportation. These broad-based inflationary impacts have negatively impacted the Company’s financial condition, results of operations and cash flows for the fiscal year ended December 31, 2021.

Supply shortages of semiconductor chips and other components have resulted in decreases in global automotive vehicle production and significant volatility in customer vehicle production schedules. The Company's semiconductor suppliers, along with most automotive component supply companies that use semiconductors, including Gentherm, have been unable to fully meet the vehicle production demands of the OEMs due to events which are outside the Company's control, including but not limited to, the COVID-19 pandemic, the global semiconductor shortage, fires at suppliers’ facilities, significant weather events impacting semiconductor supplier facilities in the southern United States, and other extraordinary events.

In response to the global supply chain instability and inflationary cost increases the Company has taken several actions to minimize any potential and actual adverse impacts by working with its suppliers and customers to closely monitor the availability of semiconductor microchips and other component parts and raw materials, customer vehicle production schedules and any other supply chain inefficiencies that may arise. The consequences of the pandemic and adverse impact to the global economy continue to evolve. Accordingly, the future adverse impact on our business and financial statements remains subject to significant uncertainty as of the date of this filing.