Cybersecurity Risk Management and Strategy Disclosure	12 Months Ended
Cybersecurity Risk Management and Strategy Disclosure	Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]	Item 1C. Cybersecurity Bel employs a full-time Cybersecurity Expert who reports directly into our Global Head of IT and Cybersecurity Services. During 2025, the Company worked with third-party cybersecurity specialists to continually enhance the programs Bel has in place. These relationships involve regular communication and collaboration between the Bel cybersecurity team and our third-party providers to share threat intelligence and implement proactive measures to safeguard our systems and data. The Company has continued to invest in IT security, including additional end-user training, using layered defenses, identifying, and protecting critical assets, strengthening monitoring and alerting, and engaging experts. Our cybersecurity team regularly monitors alerts and meets to discuss threat levels, trends, and remediation. Further, we conduct periodic external penetration tests. In addition to assessing our own cybersecurity preparedness, we also consider and evaluate cybersecurity risks associated with the use of third-party service providers that host our applications. The internal business owners of the hosted applications are required to document user access reviews at least annually and provide from the vendor a System and Organization Controls (SOC) 1 or SOC 2 report. Third-party contractors or vendors that require access to our network are given specific limited access to only the specific resource. The access provided expires automatically after a period determined by the project and must follow all Company security measures. The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Management Processes Integrated [Flag]	true
Cybersecurity Risk Management Processes Integrated [Text Block]	Bel employs a full-time Cybersecurity Expert who reports directly into our Global Head of IT and Cybersecurity Services. During 2025, the Company worked with third-party cybersecurity specialists to continually enhance the programs Bel has in place. These relationships involve regular communication and collaboration between the Bel cybersecurity team and our third-party providers to share threat intelligence and implement proactive measures to safeguard our systems and data. The Company has continued to invest in IT security, including additional end-user training, using layered defenses, identifying, and protecting critical assets, strengthening monitoring and alerting, and engaging experts. Our cybersecurity team regularly monitors alerts and meets to discuss threat levels, trends, and remediation. Further, we conduct periodic external penetration tests. In addition to assessing our own cybersecurity preparedness, we also consider and evaluate cybersecurity risks associated with the use of third-party service providers that host our applications. The internal business owners of the hosted applications are required to document user access reviews at least annually and provide from the vendor a System and Organization Controls (SOC) 1 or SOC 2 report. Third-party contractors or vendors that require access to our network are given specific limited access to only the specific resource.
Cybersecurity Risk Management Third Party Engaged [Flag]	true
Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]	true
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Role of Management [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Management Positions or Committees Responsible [Flag]	true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]	The Audit Committee of the Board of Directors is responsible for overseeing the management of cybersecurity risks. The Audit Committee is informed about cybersecurity risks through quarterly reports from the Global Head of IT and Cybersecurity Services and, as necessary, to the full Board. The Audit Committee also reviews and approves the company’s cybersecurity policies and the Company’s Global Head of IT and Cybersecurity Services is responsible for developing and implementing our information security program and reporting on cybersecurity matters to the Board. This includes our overall information security strategy, policy, security engineering, operations and cyber incident detection and response reporting in alignment with Company policies. The current Global Head of IT and Cybersecurity Services has more than 17 years of information technology and program management experience which includes information security, and others on our IT security team have extensive cybersecurity experience and certifications.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]	true

BEL FUSE INC /NJ 10-K