Document and Entity Information	3 Months Ended
	Aug. 31, 2014	Sep. 30, 2014
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 31, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	ELRC
Entity Registrant Name	ELECTRO RENT CORP
Entity Central Index Key	0000032166
Current Fiscal Year End Date	--05-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		24,008,683