Document and Entity Information - shares	9 Months Ended
	Mar. 02, 2019	Apr. 09, 2019
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	Mar. 02, 2019
Amendment Flag	false
Current Fiscal Year End Date	--06-01
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Filer Category	Accelerated Filer
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,956,852
Common Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,096,919