Restructuring and Related Activities (Tables)	9 Months Ended
Sep. 30, 2026
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs [Table Text Block]	8. RESTRUCTURING On January 20, 2025, the Company announced a cost-reduction plan (“2025 Restructuring Plan”) aimed at further streamlining operations and enhancing its focus on AI data centers, EV, and mobile applications. The plan included a 19% reduction in workforce, with most associated costs related to severance and stock-based compensation. No restructuring-related liabilities under the 2025 Restructuring Plan remain as of September 30, 2026. The Company incurred no restructuring costs under this plan during the three months ended September 30, 2026 and $1.5 million during the nine months ended September 30, 2025. During the fourth quarter of 2025, the Company announced the Navitas 2.0 Restructuring Plan (“Restructuring Plan”) to further streamline its organization and enhance operational efficiency in support of its long-term growth strategy across high-priority markets, AI data centers, energy and grid infrastructure, performance computing and industrial electrification. The plan primarily consists of a 19% targeted workforce reduction and organizational realignments, with associated costs largely related to employee severance and benefits, contract termination costs, and fixed asset impairments. These actions are intended to sharpen the Company’s focus on higher-value opportunities, strengthen its technology leadership, and improve financial discipline. As of September 30, 2026, the actions under the Restructuring Plan were substantially complete, with remaining costs expected to be recognized by the end of fiscal year 2026. During the three months ended September 30, 2026, the Company recognized an additional noncash impairment charge of $2.9 million related to an epitaxial reactor associated with the Navitas 2.0 Restructuring Plan, reducing its carrying amount to zero. Restructuring expense for the three and nine months ended September 30, 2026 also includes a $0.3 million foreign currency remeasurement loss on the euro-denominated liability for the reactor. The impairment followed the cancellation of the planned equipment trade-in and management’s evaluation of updated market information, including indications of limited demand for production use and potential recovery through parts-only disposition. The charge is included in restructuring expense in the condensed consolidated statements of operations.

On January 20, 2025, the Company announced a cost-reduction plan (“2025 Restructuring Plan”) aimed at further streamlining operations and enhancing its focus on AI data centers, EV, and mobile applications. The plan included a 19% reduction in workforce, with most associated costs related to severance and stock-based compensation. No restructuring-related liabilities under the 2025 Restructuring Plan remain as of September 30, 2026. The Company incurred no restructuring costs under this plan during the three months ended September 30, 2026 and $1.5 million during the nine months ended September 30, 2025.

During the fourth quarter of 2025, the Company announced the Navitas 2.0 Restructuring Plan (“Restructuring Plan”) to further streamline its organization and enhance operational efficiency in support of its long-term growth strategy across high-priority markets, AI data centers, energy and grid infrastructure, performance computing and industrial electrification. The plan primarily consists of a 19% targeted workforce reduction and organizational realignments, with associated costs largely related to employee severance and benefits, contract termination costs, and fixed asset impairments. These actions are intended to sharpen the Company’s focus on higher-value opportunities, strengthen its technology leadership, and improve financial discipline. As of September 30, 2026, the actions under the Restructuring Plan were substantially complete, with remaining costs expected to be recognized by the end of fiscal year 2026.

During the three months ended September 30, 2026, the Company recognized an additional noncash impairment charge of $2.9 million related to an epitaxial reactor associated with the Navitas 2.0 Restructuring Plan, reducing its carrying amount to zero. Restructuring expense for the three and nine months ended September 30, 2026 also includes a $0.3 million foreign currency remeasurement loss on the euro-denominated liability for the reactor. The impairment followed the cancellation of the planned equipment trade-in and management’s evaluation of updated market information, including indications of limited demand for production use and potential recovery through parts-only disposition. The charge is included in restructuring expense in the condensed consolidated statements of operations.