v3.25.2
Cover - USD ($)
 12 Months Ended
Apr. 30, 2025
Jul. 09, 2025
Oct. 31, 2024
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Financial Statement Error Correction [Flag] false    
Entity Interactive Data Current Yes    
ICFR Auditor Attestation Flag false    
Amendment Flag false    
Document Period End Date Apr. 30, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE: PART III incorporates information by reference from the definitive proxy statement to be filed with the Securities and Exchange Commission with respect to the Annual Meeting of Stockholders to be held on or about October 8, 2025.

    
Entity Information [Line Items]      
Entity Registrant Name FREQUENCY ELECTRONICS, INC.    
Entity Central Index Key 0000039020    
Entity File Number 1-8061    
Entity Tax Identification Number 11-1986657    
Entity Incorporation, State or Country Code DE    
Current Fiscal Year End Date --04-30    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Shell Company false    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Public Float     $ 73,400,000
Entity Contact Personnel [Line Items]      
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    
Entity Phone Fax Numbers [Line Items]      
City Area Code 516    
Local Phone Number 794-4500    
Entity Listings [Line Items]      
Title of 12(b) Security Common Stock (par value $1.00 per share)    
Trading Symbol FEIM    
Security Exchange Name NASDAQ    
Entity Common Stock, Shares Outstanding   9,727,928