Segment Information (Details) - Reconciliation of Other Significant Reconciling Items from Segments to Consolidated - USD ($) $ in Thousands	12 Months Ended
Apr. 30, 2023	Apr. 30, 2022
Depreciation and amortization (allocated):
Depreciation, Depletion and Amortization	$ 2,434	$ 3,025
Frequency Electronics Inc New York [Member]
Depreciation and amortization (allocated):
Depreciation, Depletion and Amortization	2,229	2,798
Frequency Electronics Inc Zyfer [Member]
Depreciation and amortization (allocated):
Depreciation, Depletion and Amortization	205	227
Corporate Segment [Member]
Depreciation and amortization (allocated):
Depreciation, Depletion and Amortization	$ 0	$ 0

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Name:	us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration