v3.26.3
Document And Entity Information - shares
 3 Months Ended
Jul. 31, 2026
Sep. 08, 2026
Document Information Line Items    
Entity Central Index Key 0000039020  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jul. 31, 2026  
Document Transition Report false  
Entity File Number 1-8061  
Entity Registrant Name FREQUENCY ELECTRONICS, INC.  
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  
Local Phone Number 794-4500  
Title of 12(b) Security Common Stock (par value $1.00 per share)  
Trading Symbol FEIM  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   11,273,287
Amendment Flag false  
Document Fiscal Year Focus 2027  
Document Fiscal Period Focus Q1  
Current Fiscal Year End Date --04-30