Document and Entity Information	9 Months Ended
	Mar. 02, 2013	Apr. 08, 2013 Common Stock	Apr. 08, 2013 Class B Common Stock
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 02, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Trading Symbol	RELL
Entity Registrant Name	RICHARDSON ELECTRONICS LTD/DE
Entity Central Index Key	0000355948
Current Fiscal Year End Date	--06-01
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		12,297,332	2,739,569