Document and Entity Information	6 Months Ended
	Nov. 29, 2014	Jan. 05, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 29, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Trading Symbol	RELL
Entity Registrant Name	RICHARDSON ELECTRONICS LTD/DE
Entity Central Index Key	0000355948
Current Fiscal Year End Date	--05-30
Entity Filer Category	Accelerated Filer
Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		11,651,679
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,140,644