Document and Entity Information - shares	3 Months Ended
	Sep. 01, 2018	Oct. 09, 2018
Document Information [Line Items]
Entity Registrant Name	RICHARDSON ELECTRONICS LTD/DE
Entity Central Index Key	0000355948
Document Type	10-Q
Trading Symbol	RELL
Document Period End Date	Sep. 01, 2018
Amendment Flag	false
Current Fiscal Year End Date	--06-01
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2019
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,951,101
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,096,419