Document And Entity Information	9 Months Ended
	Jan. 31, 2015	Mar. 09, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	FREQUENCY ELECTRONICS INC
Document Type	10-Q
Current Fiscal Year End Date	--04-30
Entity Common Stock, Shares Outstanding		8,619,340
Amendment Flag	false
Entity Central Index Key	0000039020
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Smaller Reporting Company
Entity Well-known Seasoned Issuer	No
Document Period End Date	Jan. 31, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3