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NOTE F - SEGMENT INFORMATION (Details) - Reconciliation of Assets from Segment to Consolidate (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2013
Apr. 30, 2013
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets $ 114,008 $ 108,909
Frequency Electronics Inc New York [Member] | China [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets 3,000 3,000
Frequency Electronics Inc New York [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets 58,972 55,508
Gillam Frequency Electronics Inc [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets 18,874 18,071
Frequency Electronics Inc Zyfer [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets 10,934 10,418
Inter Segment [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets (19,016) (18,903)
Corporate Segment [Member]
    
Segment Reporting, Asset Reconciling Item [Line Items]    
Identifiable assets $ 44,244 $ 43,815