Document and Entity Information - shares	3 Months Ended
	Aug. 29, 2015	Oct. 05, 2015
Document Information [Line Items]
Entity Central Index Key	0000355948
Entity Registrant Name	RICHARDSON ELECTRONICS LTD/DE
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 29, 2015
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q1
Trading Symbol	RELL
Current Fiscal Year End Date	--05-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		10,725,453
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,140,644