v3.10.0.1
Document And Entity Information - shares
6 Months Ended
Oct. 31, 2018
Dec. 12, 2018
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   8,729,682
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, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Ex Transition Period false