Document And Entity Information - shares	6 Months Ended
	Oct. 31, 2022	Dec. 14, 2022
Document Information Line Items
Entity Registrant Name	FREQUENCY ELECTRONICS, INC.
Trading Symbol	FEIM
Document Type	10-Q
Current Fiscal Year End Date	--04-30
Entity Common Stock, Shares Outstanding		9,343,717
Amendment Flag	false
Entity Central Index Key	0000039020
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Oct. 31, 2022
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	1-8061
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-1986657
Entity Address, Address Line One	55 CHARLES LINDBERGH BLVD.
Entity Address, City or Town	MITCHEL FIELD
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11553
City Area Code	516-794-4500
Local Phone Number	516-794-4500
Title of 12(b) Security	Common Stock (par value $1.00 per share)
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes