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v3.20.2

Summary of Accounting Policies (Details) - Disaggregation of Revenue - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019
Disaggregation of Revenue [Line Items] |  |
Revenue | $ 41,507 | $ 49,509
Frequency Electronics Inc New York [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 31,751 | 38,096
Frequency Electronics Inc Zyfer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 10,914 | 12,235
Inter Segment [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | (1,158) | (822)
Revenue | (1,158) | (822)
POC Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 37,842 | 45,329
POC Revenue [Member] | Frequency Electronics Inc New York [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 28,720 | 35,588
POC Revenue [Member] | Frequency Electronics Inc Zyfer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 9,210 | 9,803
POC Revenue [Member] | Inter Segment [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | (88) | (62)
POT Revenue [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 3,665 | 4,180
POT Revenue [Member] | Frequency Electronics Inc New York [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 3,031 | 2,508
POT Revenue [Member] | Frequency Electronics Inc Zyfer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | 1,704 | 2,432
POT Revenue [Member] | Inter Segment [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue | $ (1,070) | $ (760)

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