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SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)
SEGMENT INFORMATION (Details) [Line Items]
Number of Reportable Segments	2
Revenues	$ 12,951	$ 12,554
Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Number Of Principal Markets	3
Revenues	$ 9,839	9,010
POC Revenue [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	11,651	11,509
POC Revenue [Member] | Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	8,622	8,160
POT Revenue [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	1,300	1,045
POT Revenue [Member] | Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	$ 1,217	$ 850

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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