DESCRIPTION OF THE COMPANY	6 Months Ended
Nov. 28, 2015
Accounting Policies [Abstract]
DESCRIPTION OF THE COMPANY	1. DESCRIPTION OF THE COMPANY Richardson Electronics, Ltd. is a leading global provider of engineered solutions, power grid and microwave tubes and related consumables; power conversion and RF and microwave components; high value displays, flat panel detector solutions and replacement parts for diagnostic imaging equipment; and customized display solutions. We serve customers in the alternative energy, healthcare, aviation, broadcast, communications, industrial, marine, medical, military, scientific and semiconductor markets. The Company’s strategy is to provide specialized technical expertise and “engineered solutions” based on our core engineering and manufacturing capabilities. The Company provides solutions and adds value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair through its global infrastructure. Our products include electron tubes and related components, microwave generators, subsystems used in semiconductor manufacturing, and visual technology solutions. These products are used to control, switch or amplify electrical power signals, or are used as display devices in a variety of industrial, commercial, medical, and communication applications. On June 15, 2015, Richardson Electronics, Ltd (“the Company”), acquired certain assets of International Medical Equipment and Services, Inc. (“IMES”), for a purchase price of $12.2 million. This includes the purchase of inventory, receivables, fixed assets, and certain other assets of the Company. The Company did not acquire any liabilities of IMES. The total consideration paid excludes transaction costs and is subject to post close adjustments. IMES, based in South Carolina, provides reliable, cost-saving solutions worldwide for major brands of CT and MRI equipment. This acquisition positions Richardson Healthcare to provide cost effective diagnostic imaging replacement parts and training to hospitals, diagnostic imaging centers, medical institutions, and independent service organizations. IMES offers an extensive selection of replacement parts, as well as an interactive training center, on-site test bays and experienced technicians who provide 24/7 customer support. Replacement parts are readily available and triple tested to provide peace of mind when uptime is critical. IMES core operations will remain in South Carolina. Richardson Healthcare plans to expand IMES’ replacement parts and training offerings geographically leveraging the Company’s global infrastructure. We have three operating segments, which we define as follows: Power and Microwave Technologies Group (“PMT”), launched in July 2015, combines Electron Device Group’s (“EDG”) core engineered solutions, power grid and microwave tube business with new RF and power technologies. As a manufacturer and authorized distributor, PMT’s strategy is to provide specialized technical expertise and engineered solutions based on our core engineering and manufacturing capabilities. We provide solutions and add value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair—all through our existing global infrastructure. PMT’s focus is on products for power, RF and microwave applications for customers in alternative energy, aviation, broadcast, communications, industrial, marine, medical, military, scientific, and semiconductor markets. PMT focuses on various applications including broadcast transmission, CO2 laser cutting, diagnostic imaging, dielectric and induction heating, high energy transfer, high voltage switching, plasma, power conversion, radar, and radiation oncology. PMT also offers its customers technical services for both microwave and industrial equipment. Canvys provides customized display solutions serving the corporate enterprise, financial, healthcare, industrial, and medical original equipment manufacturers (“OEM”) markets. Healthcare manufactures, distributes and services high value replacement parts for the healthcare market including hospitals, medical centers, independent service organizations, and multi-vendor service providers. Products include power grid tubes, hydrogen thyratrons, klystrons, magnetrons; Image Systems medical displays and workstations for picture archiving and communication systems (“PACS”); visual solutions for operating rooms/surgical environments; digital radiography solutions including replacement flat panel detectors and upgrades; and additional replacement components currently under development for the diagnostic imaging service market. Through a combination of newly developed products and partnerships, service offerings, and training programs, we believe we can help our customers improve efficiency and deliver better clinical outcomes while lowering the cost of healthcare delivery. We currently have operations in the following major geographic regions: North America, Asia/Pacific, Europe, and Latin America.

DESCRIPTION OF THE COMPANY

6 Months Ended

Nov. 28, 2015

1. DESCRIPTION OF THE COMPANY

Richardson Electronics, Ltd. is a leading global provider of engineered solutions, power grid and microwave tubes and related consumables; power conversion and RF and microwave components; high value displays, flat panel detector solutions and replacement parts for diagnostic imaging equipment; and customized display solutions. We serve customers in the alternative energy, healthcare, aviation, broadcast, communications, industrial, marine, medical, military, scientific and semiconductor markets. The Company’s strategy is to provide specialized technical expertise and “engineered solutions” based on our core engineering and manufacturing capabilities. The Company provides solutions and adds value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair through its global infrastructure.

Our products include electron tubes and related components, microwave generators, subsystems used in semiconductor manufacturing, and visual technology solutions. These products are used to control, switch or amplify electrical power signals, or are used as display devices in a variety of industrial, commercial, medical, and communication applications.

On June 15, 2015, Richardson Electronics, Ltd (“the Company”), acquired certain assets of International Medical Equipment and Services, Inc. (“IMES”), for a purchase price of $12.2 million. This includes the purchase of inventory, receivables, fixed assets, and certain other assets of the Company. The Company did not acquire any liabilities of IMES. The total consideration paid excludes transaction costs and is subject to post close adjustments.

IMES, based in South Carolina, provides reliable, cost-saving solutions worldwide for major brands of CT and MRI equipment. This acquisition positions Richardson Healthcare to provide cost effective diagnostic imaging replacement parts and training to hospitals, diagnostic imaging centers, medical institutions, and independent service organizations. IMES offers an extensive selection of replacement parts, as well as an interactive training center, on-site test bays and experienced technicians who provide 24/7 customer support. Replacement parts are readily available and triple tested to provide peace of mind when uptime is critical. IMES core operations will remain in South Carolina. Richardson Healthcare plans to expand IMES’ replacement parts and training offerings geographically leveraging the Company’s global infrastructure.

We have three operating segments, which we define as follows:

Power and Microwave Technologies Group (“PMT”), launched in July 2015, combines Electron Device Group’s (“EDG”) core engineered solutions, power grid and microwave tube business with new RF and power technologies. As a manufacturer and authorized distributor, PMT’s strategy is to provide specialized technical expertise and engineered solutions based on our core engineering and manufacturing capabilities. We provide solutions and add value through design-in support, systems integration, prototype design and manufacturing, testing, logistics, and aftermarket technical service and repair—all through our existing global infrastructure. PMT’s focus is on products for power, RF and microwave applications for customers in alternative energy, aviation, broadcast, communications, industrial, marine, medical, military, scientific, and semiconductor markets. PMT focuses on various applications including broadcast transmission, CO2 laser cutting, diagnostic imaging, dielectric and induction heating, high energy transfer, high voltage switching, plasma, power conversion, radar, and radiation oncology. PMT also offers its customers technical services for both microwave and industrial equipment.

Canvys provides customized display solutions serving the corporate enterprise, financial, healthcare, industrial, and medical original equipment manufacturers (“OEM”) markets.

Healthcare manufactures, distributes and services high value replacement parts for the healthcare market including hospitals, medical centers, independent service organizations, and multi-vendor service providers. Products include power grid tubes, hydrogen thyratrons, klystrons, magnetrons; Image Systems medical displays and workstations for picture archiving and communication systems (“PACS”); visual solutions for operating rooms/surgical environments; digital radiography solutions including replacement flat panel detectors and upgrades; and additional replacement components currently under development for the diagnostic imaging service market. Through a combination of newly developed products and partnerships, service offerings, and training programs, we believe we can help our customers improve efficiency and deliver better clinical outcomes while lowering the cost of healthcare delivery.

We currently have operations in the following major geographic regions: North America, Asia/Pacific, Europe, and Latin America.