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Document And Entity Information - shares	9 Months Ended
Document And Entity Information - shares	Jan. 31, 2020	Mar. 10, 2020
Document Information Line Items
Entity Registrant Name	FREQUENCY ELECTRONICS INC
Document Type	10-Q
Current Fiscal Year End Date	--04-30
Entity Common Stock, Shares Outstanding		9,107,558
Amendment Flag	false
Entity Central Index Key	0000039020
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jan. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Interactive Data Current	Yes

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Current assets:
Cash and cash equivalents	$ 270	$ 3,683
Marketable securities	9,460	8,199
Accounts receivable, net of allowance for doubtful accounts of $183 at January 31, 2020 and April 30, 2019	4,073	6,362
Costs and estimated earnings in excess of billings, net	8,011	6,670
Inventories, net	23,487	23,356
Prepaid income taxes	31	499
Prepaid expenses and other	2,360	2,583
Current assets held for sale	0	1,347
Total current assets	47,692	52,699
Property, plant and equipment, at cost, net of accumulated depreciation and amortization	12,011	13,038
Goodwill	617	617
Cash surrender value of life insurance and cash held in trust	14,821	14,292
Right-of-Use assets	11,197	0
Other assets	3,830	5,923
Non-current assets held for sale	0	202
Total assets	90,168	86,771
Current liabilities:
Accounts payable – trade	1,520	1,188
Accrued liabilities	3,625	3,571
Loss provision accrual	786	0
Lease liability, current	2,059	0
Current liabilities held for sale	0	1,078
Total current liabilities	7,990	5,837
Deferred compensation	14,448	14,216
Lease liability	9,579	0
Other liabilities	1,326	1,376
Non-current liabilities held for sale	0	2,253
Total liabilities	33,343	23,682
Commitments and contingencies
Stockholders’ equity:
Preferred stock - $1.00 par value; authorized 600 shares, no shares issued
Common stock - $1.00 par value; authorized 20,000 shares, 9,164 shares issued, 9,108 shares outstanding at January 31, 2020; 8,980 shares outstanding at April 30, 2019	9,164	9,164
Additional paid-in capital	56,772	56,831
Accumulated deficit	(9,157)	(2,111)
	56,779	63,884
Common stock reacquired and held in treasury - at cost (56 shares at January 31, 2020 and 184 shares at April 30, 2019)	(258)	(841)
Accumulated other comprehensive income	304	46
Total stockholders’ equity	56,825	63,089
Total liabilities and stockholders’ equity	$ 90,168	$ 86,771

Condensed Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Allowance for doubtful accounts (in Dollars)	$ 183	$ 183
Preferred stock, par value (in Dollars per share)	$ 1.00	$ 1.00
Preferred stock - shares authorized	600	600
Preferred stock - shares issued	0	0
Common stock, par value (in Dollars per share)	$ 1.00	$ 1.00
Common stock shares issued	9,164	9,164
Common stock - authorized shares	20,000	20,000
Common stock - shares outstanding	9,108	8,980
Treasury stock, shares	56	184

Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Revenues	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Cost of revenues	6,488	9,093	25,358	23,953
Gross margin	3,140	4,100	5,912	12,392
Selling and administrative expenses	3,619	2,657	8,362	7,838
Research and development expense	1,082	1,837	4,813	5,094
Operating loss	(1,561)	(394)	(7,263)	(540)
Other income (expense):
Investment income	191	52	415	242
Interest expense	(25)	(23)	(75)	(57)
Other (expense) income, net	(132)	104	(75)	225
Loss before provision for income taxes	(1,527)	(261)	(6,998)	(130)
Provision for income taxes	19	60	48	38
Net loss	$ (1,546)	$ (321)	$ (7,046)	$ (168)
Net loss per common share:
Basic and diluted loss per share (in Dollars per share)	$ (0.17)	$ (0.04)	$ (0.78)	$ (0.02)
Weighted average shares outstanding:
Basic & Diluted (in Shares)	9,104,288	8,927,710	9,059,251	8,899,110
Condensed Consolidated Statements of Comprehensive (Loss) Income
Net loss	$ (1,546)	$ (321)	$ (7,046)	$ (168)
Foreign currency translation adjustment	0	343	0	261
Change in market value of marketable securities before reclassification, net of tax	50	150	258	95
Reclassification adjustment for realized gains included in net loss, net of tax	2	1	1	(1)
Total unrealized gain on marketable securities, net of tax	52	151	259	94
Total other comprehensive income	52	494	259	355
Comprehensive (loss) income	$ (1,494)	$ 173	$ (6,787)	$ 187

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Cash flows from operating activities:
Net loss	$ (7,046)	$ (168)
Non-cash charges to earnings	5,955	3,303
Net changes in operating assets and liabilities	331	(4,420)
Net cash used in operating activities	(760)	(1,285)
Cash flows from investing activities:
Proceeds on redemption of marketable securities	3,037	987
Purchase of marketable securities	(4,049)	(3,200)
Purchase of fixed assets and other assets	(1,641)	(2,175)
Net cash used in investing activities	(2,653)	(4,388)
Net decrease in cash and cash equivalents before effect of exchange rate changes	(3,413)	(5,673)
Effect of exchange rate changes on cash and cash equivalents	0	222
Net decrease in cash and cash equivalents	(3,413)	(5,451)
Cash and cash equivalents at beginning of period	3,683	7,869
Cash and cash equivalents at end of period	270	2,418
Supplemental disclosures of cash flow information:
Interest	75	57
Income taxes	$ 0	$ 2

Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Apr. 30, 2018	$ 9,164	$ 56,439	$ (65)	$ (1,361)	$ (915)	$ 63,262
Balance (in Shares) at Apr. 30, 2018	9,163,940			297,083
Opening BS adjustment for adoption of ASU 2014-09			484			484
Balance at May. 01, 2018	$ 9,164	56,439	419	$ (1,361)	(915)	63,746
Balance (in Shares) at May. 01, 2018	9,163,940			297,083
Balance at Apr. 30, 2018	$ 9,164	56,439	(65)	$ (1,361)	(915)	63,262
Balance (in Shares) at Apr. 30, 2018	9,163,940			297,083
Contribution of stock to 401(k) plan		50		$ 66		116
Contribution of stock to 401(k) plan (in Shares)				(14,339)
Stock-based compensation expense		121				121
Other comprehensive income, net of tax					(44)	(44)
Net income (loss)			31			31
Balance at Jul. 31, 2018	$ 9,164	56,610	450	$ (1,295)	(959)	63,970
Balance (in Shares) at Jul. 31, 2018	9,163,940			282,744
Balance at Apr. 30, 2018	$ 9,164	56,439	(65)	$ (1,361)	(915)	$ 63,262
Balance (in Shares) at Apr. 30, 2018	9,163,940			297,083
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)						30,257
Other comprehensive income, net of tax						$ 355
Net income (loss)						(168)
Balance at Jan. 31, 2019	$ 9,164	56,696	251	$ (960)	(560)	64,591
Balance (in Shares) at Jan. 31, 2019	9,163,940			209,482
Balance at Jul. 31, 2018	$ 9,164	56,610	450	$ (1,295)	(959)	63,970
Balance (in Shares) at Jul. 31, 2018	9,163,940			282,744
Contribution of stock to 401(k) plan		58		$ 46		104
Contribution of stock to 401(k) plan (in Shares)				(10,089)
Stock-based compensation expense		123				123
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price		(81)		$ 81
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)				(17,708)
Other comprehensive income, net of tax					(95)	(95)
Net income (loss)			122			122
Balance at Oct. 31, 2018	$ 9,164	56,710	572	$ (1,168)	(1,054)	64,224
Balance (in Shares) at Oct. 31, 2018	9,163,940			254,947
Contribution of stock to 401(k) plan		35		$ 27		62
Contribution of stock to 401(k) plan (in Shares)				(5,829)
Stock-based compensation expense		128		$ 4		132
Stock-based compensation expense (in Shares)				(1,100)
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price		(177)		$ 177
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)				(38,536)
Other comprehensive income, net of tax					494	494
Net income (loss)			(321)			(321)
Balance at Jan. 31, 2019	$ 9,164	56,696	251	$ (960)	(560)	64,591
Balance (in Shares) at Jan. 31, 2019	9,163,940			209,482
Balance at Apr. 30, 2019	$ 9,164	56,831	(2,111)	$ (841)	46	63,089
Balance (in Shares) at Apr. 30, 2019	9,163,940			183,661
Contribution of stock to 401(k) plan		74		$ 50		124
Contribution of stock to 401(k) plan (in Shares)				(10,906)
Stock-based compensation expense		80				80
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price		(189)		$ 189
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)				(41,325)
Other comprehensive income, net of tax					134	134
Net income (loss)			(591)			(591)
Balance at Jul. 31, 2019	$ 9,164	56,796	(2,702)	$ (602)	180	62,836
Balance (in Shares) at Jul. 31, 2019	9,163,940			131,430
Balance at Apr. 30, 2019	$ 9,164	56,831	(2,111)	$ (841)	46	$ 63,089
Balance (in Shares) at Apr. 30, 2019	9,163,940			183,661
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)						25,718
Other comprehensive income, net of tax						$ 259
Net income (loss)						(7,046)
Balance at Jan. 31, 2020	$ 9,164	56,772	(9,157)	$ (258)	304	56,825
Balance (in Shares) at Jan. 31, 2020	9,163,940			56,381
Balance at Jul. 31, 2019	$ 9,164	56,796	(2,702)	$ (602)	180	62,836
Balance (in Shares) at Jul. 31, 2019	9,163,940			131,430
Contribution of stock to 401(k) plan		66		$ 39		105
Contribution of stock to 401(k) plan (in Shares)				(8,703)
Stock-based compensation expense		64				64
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price		(268)		$ 268
Exercise of stock options and stock appreciation rights - net of shares tendered for exercise price (in Shares)				(58,387)
Other comprehensive income, net of tax					72	72
Net income (loss)			(4,909)			(4,909)
Balance at Oct. 31, 2019	$ 9,164	56,658	(7,611)	$ (295)	252	58,168
Balance (in Shares) at Oct. 31, 2019	9,163,940			64,340
Contribution of stock to 401(k) plan		34		$ 28		62
Contribution of stock to 401(k) plan (in Shares)				(6,109)
Stock-based compensation expense		80		$ 9		89
Stock-based compensation expense (in Shares)				(1,850)
Other comprehensive income, net of tax					52	52
Net income (loss)			(1,546)			(1,546)
Balance at Jan. 31, 2020	$ 9,164	$ 56,772	$ (9,157)	$ (258)	$ 304	$ 56,825
Balance (in Shares) at Jan. 31, 2020	9,163,940			56,381

CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	9 Months Ended
CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	Jan. 31, 2020
Accounting Policies [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	NOTE A – CONDENSED CONSOLIDATED FINANCIAL STATEMENTS In the opinion of management of Frequency Electronics, Inc. (the “Company”), the accompanying unaudited condensed consolidated interim financial statements reflect all adjustments (which include only normal recurring adjustments) necessary to present fairly, in all material respects, the consolidated financial position of the Company as of January 31, 2020 and the results of its operations and cash flows for the nine and three months ended January 31, 2020 and 2019. The April 30, 2019 condensed consolidated balance sheet was derived from audited financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) have been condensed or omitted. It is suggested that these condensed consolidated financial statements be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended April 30, 2019, filed on July 26, 2019 with the Securities and Exchange Commission, and the financial statements and notes thereto (“2019 Form 10-K”). The results of operations for such interim periods are not necessarily indicative of the operating results for the full fiscal year.

EARNINGS PER SHARE

9 Months Ended

Jan. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

NOTE B – EARNINGS PER SHARE

Reconciliation of the weighted average shares outstanding for basic and diluted Earnings Per Share were as follows:

Periods ended January 31,

Nine months

Three months

2020

2019

2020

2019

Weighted average shares outstanding:

Basic

9,059,251

8,899,110

9,104,288

8,927,710

Effect of dilutive securities

Diluted

9,059,251

8,899,110

9,104,288

8,927,710

** For the nine- and three-month periods ended January 31, 2020 and 2019 dilutive securities are excluded since the inclusion of such shares would be antidilutive due to the net loss for the periods. The exercisable shares excluded as of January 31, 2020 are 185,000 options. The effect of dilutive securities would have been 274,425 options and 232,481 options for the nine- and three-month periods ended January 31, 2020, respectively.

COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET

9 Months Ended

Jan. 31, 2020

Contractors [Abstract]

Long-term Contracts or Programs Disclosure [Text Block]

NOTE C – COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET

At January 31, 2020 and April 30, 2019, costs and estimated earnings in excess of billings, net, consisted of the following:

	January 31, 2020			April 30, 2019
	(In thousands)
Costs and estimated earnings in excess of billings	$	12,211		$	8,278
Billings in excess of costs and estimated earnings		(4,200	)		(1,608	)
Net asset	$	8,011		$	6,670

Such amounts represent revenue recognized on long-term contracts that had not been billed at the balance sheet dates or represent a liability for amounts billed in excess of the revenue recognized. Amounts are billed to customers pursuant to contract terms, whereas the related revenue is recognized on the basis of costs incurred relative to the total expected costs, or percentage of completion (“POC”), at the measurement date. In general, the recorded amounts will be billed and collected or revenue recognized within twelve months of the balance sheet date. Revenue on these long-term contracts is accounted for on the POC basis as defined above. During the nine and three months ended January 31, 2020, revenue recognized under POC contracts was approximately $28.5 million and $8.5 million, respectively. During the nine and three months ended January 31, 2019, revenue recognized under POC contracts was approximately $33.3 million and $12.9 million, respectively. If contract losses are anticipated, the full amount of such losses are recorded in the loss provision accrual on the condensed consolidated balance sheets when they are determinable. Contract losses recognized for the nine and three months ended January 31, 2020 were approximately $2.4 million and $0.3 million, respectively.

TREASURY STOCK TRANSACTIONS	9 Months Ended
TREASURY STOCK TRANSACTIONS	Jan. 31, 2020
Disclosure Text Block Supplement [Abstract]
Treasury Stock [Text Block]	NOTE D – TREASURY STOCK TRANSACTIONS During the nine- and three-month periods ended January 31, 2020, the Company made contributions of 25,718 shares and 6,109 shares, respectively, of its common stock held in treasury to the Company’s profit-sharing plan and trust under Section 401(k) of the Internal Revenue Code. During the nine- and three-month periods ended January 31, 2019, the Company made contributions of 30,257 shares and 5,829 shares, respectively, of its common stock held in treasury to the Company’s profit sharing plan and trust under Section 401(k) of the Internal Revenue Code. Such contributions are in accordance with the Company’s discretionary match of employee voluntary contributions to this plan.

INVENTORIES

9 Months Ended

Jan. 31, 2020

Inventory Disclosure [Abstract]

Inventory Disclosure [Text Block]

NOTE E – INVENTORIES

Inventories, which are reported at the lower of cost and net realizable value, consisted of the following:

	January 31, 2020		April 30, 2019
	(In thousands)
Raw Materials and Component Parts	$	15,631	$	11,600
Work in Progress		6,053		8,896
Finished Goods		1,803		2,860
	$	23,487	$	23,356

The amounts above are net of reserves of $7.1 million and $6.6 million as of January 31, 2020 and April 30, 2019, respectively.

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

9 Months Ended

Jan. 31, 2020

Disclosure Text Block [Abstract]

Lessee, Operating Leases [Text Block]

NOTE F – RIGHT-OF-USE ASSETS AND LEASE LIABILITIES

The Company’s leases primarily represent offices, warehouses, vehicles, and manufacturing and research and development facilities which expire at various times through 2029 and are generally operating leases. Contractual arrangements are evaluated at inception to determine if the agreement contains a lease. Certain lease agreements contain renewal options, rent abatement, and escalation clauses that are factored into our determination of lease payments when appropriate. Right-of-use (“ROU”) assets and lease liabilities are recorded based on the present value of future lease payments which will factor in certain qualifying initial direct costs incurred as well as any lease incentives that may have been received. Lease expenses for operating lease payments are recognized on a straight-line basis over the lease term. Lease terms may factor in options to extend or terminate the lease.

The Company elected the practical expedient for short-term leases which allows leases with terms of twelve months or less to be recorded on a straight-line basis over the lease term without being recognized on the balance sheet.

Effective May 1, 2019, the Company adopted ASU 2016-02. The table below presents ROU assets and liabilities recorded on the unaudited condensed consolidated balance sheet related to ASU 2016-02 as follows:

	Classification	January 31, 2020
		(in thousands)
Assets
Operating lease ROU assets	ROU assets	$	11,197

Liabilities
Operating lease liabilities (short-term)	Lease liability, current		2,059
Operating lease liabilities (long-term)	Lease liability		9,579
Total lease liabilities		$	11,638

Total operating lease expense was approximately $1.5 million and $504,000 for the nine and three months, respectively, ended January 31, 2020, the majority of which is included in cost of revenues and the remaining amount in selling and administrative expenses on the unaudited condensed consolidated statements of operations. There were no new leases entered into for the current period ended January 31, 2020. Net non-cash operating activities related to leases was approximately $441,000 for the nine months ended January 31, 2020.

As previously disclosed in the 2019 Form 10-K and under the previous lease accounting standard, future minimum lease payments for operating leases having initial or remaining non-cancellable lease terms in excess of one year would have been as follows (in thousands):

For the years ending April 30,	Operating Leases
2020	$	1,316
2021		1,521
2022		1,436
2023		1,469
2024		1,502
Thereafter		6,349
Total future minimum lease payments	$	13,593

The table below reconciles the undiscounted cash flows for each of the first five years and total of the remaining years to the operating lease liabilities recorded on the unaudited consolidated balance sheet as of January 31, 2020:

Fiscal Year Ending April 30,
(in thousands)

Remainder of 2020	$	500
2021		1,919
2022		1,783
2023		1,801
2024		1,834
Thereafter		7,216
Total lease payments		15,053
Less imputed interest		(3,415	)
Present value of future lease payments		11,638
Less current obligations under leases		(2,059	)
Long-term lease obligations	$	9,579

As of January 31, 2020, the weighted-average remaining lease term for all operating leases was 8.5 years. The Company does not generally have access to the rate implicit in the leases and therefore utilized the Company’s borrowing rate as the discount rate. The weighted average discount rate for operating leases as of January 31, 2020 was 6.18%.

SEGMENT INFORMATION

9 Months Ended

Jan. 31, 2020

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

NOTE G – SEGMENT INFORMATION

The Company operates under two reportable segments based on the geographic locations of its subsidiaries:

(1)

FEI-NY – operates out of New York and its operations consist principally of precision time and frequency control products used in three principal markets: satellites (both commercial and U.S. Government-funded); terrestrial cellular telephone or other ground-based telecommunication stations; and other components and systems for the U.S. military.

The FEI-NY segment also includes the operations of the Company’s wholly-owned subsidiary, FEI-Elcom. FEI-Elcom, in addition to its own product line, provides design and technical support for the FEI-NY segment’s satellite business.

(2)

FEI-Zyfer – operates out of California and its products incorporate Global Positioning System (GPS) technologies into systems and subsystems for secure communications, both government and commercial, and other locator applications. FEI-Zyfer’s products also incorporate precision time references for terrestrial secure communications and command and control, and frequency products that incorporate GPS. FEI-Zyfer’s GPS capability complements the Company’s existing technologies and permits the combined entities to provide a broader range of embedded systems for a variety of timing functions and anti-spoofing (“SAASM”) applications.

The Company measures segment performance based on total revenues and profits generated by each geographic location rather than on the specific types of customers or end-users. Consequently, the Company determined that the segments indicated above most appropriately reflect the way the Company’s management views the business.

The accounting policies of the two segments are the same as those described in the “Summary of Significant Accounting Policies” in the 2019 Form 10-K. The Company evaluates the performance of its segments and allocates resources to them based on operating profit which is defined as income before investment income, interest expense and taxes. All acquired assets, including intangible assets, are included in the assets of both reporting segments.

The tables below present information about reported segments with reconciliation of segment amounts to consolidated amounts as reported in the condensed consolidated statements of operations or the condensed consolidated balance sheets for each of the periods (in thousands):

	Periods ended January 31,
	Nine months						Three months
	2020			2019			2020			2019
Revenues:
FEI-NY	$	24,029		$	28,076		$	7,234		$	9,754
FEI-Zyfer		8,487			8,746			2,787			3,644
less intersegment revenues		(1,246	)		(477	)		(393	)		(205	)
Consolidated revenues	$	31,270		$	36,345		$	9,628		$	13,193

Operating (loss) income:
FEI-NY	$	(6,967	)	$	(1,745	)	$	(1,493	)	$	(939	)
FEI-Zyfer		(36	)		1,305			8			847
Corporate		(260	)		(100	)		(76	)		(302	)
Consolidated operating loss	$	(7,263	)	$	(540	)	$	(1,561	)	$	(394	)

	January 31, 2020			April 30, 2019
Identifiable assets:
FEI-NY	$	46,416		$	54,295
FEI-Zyfer		14,252			10,478
less intersegment balances		(8,586	)		(8,346	)
Corporate		38,086			30,344
Consolidated identifiable assets	$	90,168		$	86,771

Total revenue related to the adoption of ASU 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”) and recognized over time as POC and Passage of Title (“POT”) was approximately $28.5 million and $2.8 million, respectively, of the $31.3 million reported for the nine months ended January 31, 2020. The amounts recognized over time as POC and POT were approximately $33.3 million and $3.1 million of the $36.3 million reported for the nine months ended January 31, 2019. The amounts by segment and product line were as follows:

	Nine Months Ended January 31,
	2020									2019
	(In thousands)									(In thousands)
	POC Revenue			POT Revenue			Total Revenue			POC Revenue			POT Revenue			Total Revenue
FEI-NY	$	21,215		$	2,814		$	24,029		$	26,611		$	1,465		$	28,076
FEI-Zyfer		7,348			1,139			8,487			6,680			2,066			8,746
Intersegment		(81	)		(1,165	)		(1,246	)		(25	)		(452	)		(477	)
Revenue	$	28,482		$	2,788		$	31,270		$	33,266		$	3,079		$	36,345

	Three Months Ended January 31,
	2020									2019
	(In thousands)									(In thousands)
	POC Revenue			POT Revenue			Total Revenue			POC Revenue		POT Revenue			Total Revenue
FEI-NY	$	6,124		$	1,110		$	7,234		$	9,412	$	342		$	9,754
FEI-Zyfer		2,423			364			2,787			3,447		197			3,644
Intersegment		(5	)		(388	)		(393	)		11		(216	)		(205	)
Revenue	$	8,542		$	1,086		$	9,628		$	12,870	$	323		$	13,193

	Periods ended January 31,
	(in thousands)
	Nine months				Three months
	2020		2019		2020		2019
Revenues by Product Line:
Satellite Revenue	$	14,704	$	17,289	$	5,272	$	5,987
Government Non-Space Revenue		12,680		17,058		3,165		6,639
Other Commercial & Industrial Revenue		3,886		1,998		1,191		567
Consolidated revenues	$	31,270	$	36,345	$	9,628	$	13,193

INVESTMENT IN MORION, INC.	9 Months Ended
INVESTMENT IN MORION, INC.	Jan. 31, 2020
Investment Holdings [Abstract]
Investment Holdings [Text Block]	NOTE H – INVESTMENT IN MORION, INC. The Company has an investment in Morion, Inc. (“Morion”), a privately-held Russian company, which manufactures high precision quartz resonators and crystal oscillators. The Company’s investment consists of 4.6% of Morion’s outstanding shares, accordingly, the Company accounts for its investment in Morion on the cost basis. This investment is included in other assets in the accompanying condensed consolidated balance sheets. During the nine months ended January 31, 2020 and 2019, the Company acquired product from Morion in the aggregate amount of approximately $712,000 and $291,000, respectively, and the Company sold product and training services to Morion in the aggregate amount of approximately $49,000 and $2,000, respectively, included in revenues in the condensed consolidated statements of operations as part of the FEI-NY segment. During the three months ended January 31, 2020 and 2019, the Company acquired product from Morion in the aggregate amount of approximately $332,000 and $145,000, respectively; however, there were no sales to Morion for products or training services for either period. At January 31, 2020 there was approximately $169,000 payable to Morion, up from approximately $38,000 at April 30, 2019, and there were no receivables related to Morion for either period. During the nine months ended January 31, 2020 and 2019, the Company received a dividend from Morion in the amount of approximately $250,000 and $125,000 respectively, which is included in other income, net in the condensed consolidated statements of operations as part of the FEI-NY segment. Morion operates as a subsidiary of Gazprombank, a state-owned Russian bank. On July 16, 2014, after the Company’s investment in Morion, Gazprombank became subject to the U.S. Department of Treasury’s prohibition against U.S. persons from providing it with new financing.

FAIR VALUE OF FINANCIAL INSTRUMENTS

9 Months Ended

Jan. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]

NOTE I – FAIR VALUE OF FINANCIAL INSTRUMENTS

The cost, gross unrealized gains, gross unrealized losses, and fair market value of available-for-sale securities at January 31, 2020 and April 30, 2019, respectively, were as follows (in thousands):

	January 31, 2020
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Fixed income securities	$	9,155	$	305	$	0	$	9,460

	April 30, 2019
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	8,152	$	71	$	(24	)	$	8,199

During the nine months ended January 31, 2020, the Company sold or redeemed available-for-sale securities of approximately $3.0 million, realizing a loss of approximately $1,200. During the nine months ended January 31, 2019, the Company sold or redeemed available-for-sale securities of approximately $987,000, realizing gains of approximately $2,000.

The following table presents the fair value and unrealized losses, aggregated by investment type and length of time that individual securities have been in a continuous unrealized loss position (in thousands):

	Less than 12 months					12 Months or more					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
January 31, 2020
Fixed Income Securities	$	161	$	0		$	0	$	0		$	161	$	0

April 30, 2019
Fixed Income Securities	$	995	$	(4	)	$	3,349	$	(20	)	$	4,344	$	(24	)

The Company regularly reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. The Company does not believe that its investments in marketable securities with unrealized losses at January 31, 2020 were other-than-temporary due to market volatility of the security’s fair value, analysts’ expectations, and the Company’s ability to hold the securities for a period of time sufficient to allow for any anticipated recoveries in market value.

Maturities of fixed income securities classified as available-for-sale at January 31, 2020 were as follows, at cost (in thousands):

Current	$	2,164
Due after one year through five years		4,235
Due after five years through ten years		2,756
	$	9,155

The fair value accounting framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements).

The levels of the fair value hierarchy are described below:

	Level 1	Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Company has the ability to access.

	Level 2	Inputs to the valuation methodology include: -Quoted prices for similar assets or liabilities in active markets; -Quoted prices for identical or similar assets or liabilities in inactive markets; -Inputs other than quoted prices that are observable for the asset or liability; and -Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

	Level 3	Inputs to the valuation methodology are unobservable and significant to the fair value measurement.

The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs. All of the Company’s investments in marketable securities are valued on a Level 1 basis.

RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	9 Months Ended
RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS	Jan. 31, 2020
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	NOTE J – RECENT ACCOUNTING PRONOUNCEMENTS In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-13 Fair Value Measurement (Topic 820) (“ASU 2018-13”) which modifies the disclosure requirement on fair value measurements. The new guidance is effective for fiscal years beginning after December 15, 2019. The Company is evaluating the effect, if any, the update will have on its financial statements when adopted in fiscal year 2021. In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment (“ASU 2017-04”), which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Under ASU 2017-04 goodwill impairment will be tested by comparing the fair value of a reporting unit with its carrying amount, and recognizing an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. The new guidance must be applied on a prospective basis and is effective for periods beginning after December 15, 2019, with early adoption permitted. The Company will not be adopting ASU 2017-04 early, and is in the process of determining the effect that ASU 2017-04 may have. However, the Company expects the new standard to have an immaterial effect on its financial statements. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”) which replaces the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. In November 2019 the FASB issued ASU No. 2019-10, Financial Instruments – Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842): Effective Dates, which defers the effective date of ASU 2016-13 to fiscal years beginning after December 15, 2022. The Company is evaluating the effect, if any, the update will have on its financial statements when adopted in fiscal year 2024. Newly Adopted Accounting Standards Leases (Topic 842) In the first quarter of fiscal 2020 the Company adopted ASU No. 2016-02 Leases (Topic 842) (“ASU 2016-02”) and recognized on its condensed consolidated balance sheets $12.1 million of lease liabilities with corresponding ROU assets for operating leases. The Company elected a prospective application for the new guidance, as permitted under ASU 2016-02, and therefore prior periods continue to be presented in accordance with Topic 840. We also elected the package of practical expedients, which among other things, does not require reassessment of lease classification.

CREDIT FACILITY	9 Months Ended
CREDIT FACILITY	Jan. 31, 2020
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	NOTE K – CREDIT FACILITY As of January 31, 2020, the Company had available credit at variable terms based on its securities holdings under an advisory arrangement, under which no borrowings have been made.

VALUATION ALLOWANCE ON DEFERRED TAX ASSETS	9 Months Ended
VALUATION ALLOWANCE ON DEFERRED TAX ASSETS	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	NOTE L – VALUATION ALLOWANCE ON DEFERRED TAX ASSETS Deferred income taxes arise from temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements, which will result in taxable or deductible amounts in the future. As required by the authoritative guidance on accounting for income taxes, we evaluate the realizability of deferred tax assets on a jurisdictional basis at each reporting date. We consider all positive and negative evidence, including the reversal of deferred tax liabilities, projected future taxable income, tax planning strategies, and results of recent operations. Accounting for income taxes requires that a valuation allowance be established when it is more likely than not that all or a portion of the deferred tax assets will not be realized. In circumstances where there is sufficient negative evidence indicating that the deferred tax assets will not be realizable, we establish a valuation allowance. As of January 31, 2020, and April 30, 2019, the Company maintained a full valuation allowance against its deferred tax assets. If these estimates and assumptions change in the future, the Company may be required to adjust its existing valuation allowance resulting in changes to deferred income tax expense.

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Jan. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	NOTE M – COMMITMENTS AND CONTINGENCIES On January 28, 2020, Martin B. Bloch, the former Chief Scientist of the Company and a current member of the Company’s Board, filed a complaint against the Company and Jonathan Brolin, Lance W. Lord, Russell M. Sarachek, Richard Schwartz and Stanton D. Sloane, each in their capacity as members of the Board (collectively, the “Director Defendants”), in the Supreme Court of the State of New York, County of Nassau (Bloch v. Frequency Electronics, Inc., et al., Index No. 601369/2020 (N.Y. Sup. Ct. filed Jan. 28, 2020)). Mr. Bloch seeks a declaratory judgment, compensatory damages and costs and attorney’s fees, among other things, based on allegations that he was wrongfully terminated “for cause” pursuant to his employment agreement, dated March 17, 2008, and his deferred compensation agreements, in each case as amended, with the Company, that the Company’s Form 8-K, filed January 27, 2020, damaged his reputation and that the Company discriminated against him based on his age. Mr. Bloch also asserts a claim derivatively on behalf of the Company that the Director Defendants breached their fiduciary duty in rendering their decision to terminate Mr. Bloch’s employment with the Company. The Company and the Director Defendants are scheduled to file their responsive pleading by March 30, 2020. The Court has not yet scheduled any hearings or other deadlines in connection with the lawsuit. The Company and the Director Defendants believe that the Board was justified in its decision to terminate Mr. Bloch “for cause” and that Mr. Bloch’s complaint is entirely without merit. The Company intends to vigorously defend against all of Mr. Bloch’s allegations. At this early stage in the case, the Company does not have sufficient information to determine whether liability, if any, arising out of these matters is probable or the possible loss, if any, that could result from an unfavorable outcome arising out of these matters.

EARNINGS PER SHARE (Tables)

9 Months Ended

Jan. 31, 2020

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

Reconciliation of the weighted average shares outstanding for basic and diluted Earnings Per Share were as follows:

Periods ended January 31,

Nine months

Three months

2020

2019

2020

2019

Weighted average shares outstanding:

Basic

9,059,251

8,899,110

9,104,288

8,927,710

Effect of dilutive securities

Diluted

9,059,251

8,899,110

9,104,288

8,927,710

COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Tables)

9 Months Ended

Jan. 31, 2020

Contractors [Abstract]

Costs and Estimated Earnings in Excess of Billings, Net [Table Text Block]

At January 31, 2020 and April 30, 2019, costs and estimated earnings in excess of billings, net, consisted of the following:

	January 31, 2020			April 30, 2019
	(In thousands)
Costs and estimated earnings in excess of billings	$	12,211		$	8,278
Billings in excess of costs and estimated earnings		(4,200	)		(1,608	)
Net asset	$	8,011		$	6,670

INVENTORIES (Tables)

9 Months Ended

Jan. 31, 2020

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories, which are reported at the lower of cost and net realizable value, consisted of the following:

	January 31, 2020		April 30, 2019
	(In thousands)
Raw Materials and Component Parts	$	15,631	$	11,600
Work in Progress		6,053		8,896
Finished Goods		1,803		2,860
	$	23,487	$	23,356

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Tables)

9 Months Ended

Jan. 31, 2020

Disclosure Text Block [Abstract]

Lessee, Operating Lease, Disclosure [Table Text Block]

	Classification	January 31, 2020
		(in thousands)
Assets
Operating lease ROU assets	ROU assets	$	11,197

Liabilities
Operating lease liabilities (short-term)	Lease liability, current		2,059
Operating lease liabilities (long-term)	Lease liability		9,579
Total lease liabilities		$	11,638

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

For the years ending April 30,	Operating Leases
2020	$	1,316
2021		1,521
2022		1,436
2023		1,469
2024		1,502
Thereafter		6,349
Total future minimum lease payments	$	13,593

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

Fiscal Year Ending April 30,
(in thousands)

Remainder of 2020	$	500
2021		1,919
2022		1,783
2023		1,801
2024		1,834
Thereafter		7,216
Total lease payments		15,053
Less imputed interest		(3,415	)
Present value of future lease payments		11,638
Less current obligations under leases		(2,059	)
Long-term lease obligations	$	9,579

SEGMENT INFORMATION (Tables)

9 Months Ended

Jan. 31, 2020

Segment Reporting [Abstract]

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

	Periods ended January 31,
	Nine months						Three months
	2020			2019			2020			2019
Revenues:
FEI-NY	$	24,029		$	28,076		$	7,234		$	9,754
FEI-Zyfer		8,487			8,746			2,787			3,644
less intersegment revenues		(1,246	)		(477	)		(393	)		(205	)
Consolidated revenues	$	31,270		$	36,345		$	9,628		$	13,193

Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block]

Operating (loss) income:
FEI-NY	$	(6,967	)	$	(1,745	)	$	(1,493	)	$	(939	)
FEI-Zyfer		(36	)		1,305			8			847
Corporate		(260	)		(100	)		(76	)		(302	)
Consolidated operating loss	$	(7,263	)	$	(540	)	$	(1,561	)	$	(394	)

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	January 31, 2020			April 30, 2019
Identifiable assets:
FEI-NY	$	46,416		$	54,295
FEI-Zyfer		14,252			10,478
less intersegment balances		(8,586	)		(8,346	)
Corporate		38,086			30,344
Consolidated identifiable assets	$	90,168		$	86,771

Disaggregation of Revenue [Table Text Block]

The amounts by segment and product line were as follows:

	Nine Months Ended January 31,
	2020									2019
	(In thousands)									(In thousands)
	POC Revenue			POT Revenue			Total Revenue			POC Revenue			POT Revenue			Total Revenue
FEI-NY	$	21,215		$	2,814		$	24,029		$	26,611		$	1,465		$	28,076
FEI-Zyfer		7,348			1,139			8,487			6,680			2,066			8,746
Intersegment		(81	)		(1,165	)		(1,246	)		(25	)		(452	)		(477	)
Revenue	$	28,482		$	2,788		$	31,270		$	33,266		$	3,079		$	36,345

	Three Months Ended January 31,
	2020									2019
	(In thousands)									(In thousands)
	POC Revenue			POT Revenue			Total Revenue			POC Revenue		POT Revenue			Total Revenue
FEI-NY	$	6,124		$	1,110		$	7,234		$	9,412	$	342		$	9,754
FEI-Zyfer		2,423			364			2,787			3,447		197			3,644
Intersegment		(5	)		(388	)		(393	)		11		(216	)		(205	)
Revenue	$	8,542		$	1,086		$	9,628		$	12,870	$	323		$	13,193

Revenue from External Customers by Products and Services [Table Text Block]

	Periods ended January 31,
	(in thousands)
	Nine months				Three months
	2020		2019		2020		2019
Revenues by Product Line:
Satellite Revenue	$	14,704	$	17,289	$	5,272	$	5,987
Government Non-Space Revenue		12,680		17,058		3,165		6,639
Other Commercial & Industrial Revenue		3,886		1,998		1,191		567
Consolidated revenues	$	31,270	$	36,345	$	9,628	$	13,193

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Jan. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation [Table Text Block]

The cost, gross unrealized gains, gross unrealized losses, and fair market value of available-for-sale securities at January 31, 2020 and April 30, 2019, respectively, were as follows (in thousands):

	January 31, 2020
	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Fixed income securities	$	9,155	$	305	$	0	$	9,460

	April 30, 2019
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	8,152	$	71	$	(24	)	$	8,199

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]

	Less than 12 months					12 Months or more					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
January 31, 2020
Fixed Income Securities	$	161	$	0		$	0	$	0		$	161	$	0

April 30, 2019
Fixed Income Securities	$	995	$	(4	)	$	3,349	$	(20	)	$	4,344	$	(24	)

Investments Classified by Contractual Maturity Date [Table Text Block]

Maturities of fixed income securities classified as available-for-sale at January 31, 2020 were as follows, at cost (in thousands):

Current	$	2,164
Due after one year through five years		4,235
Due after five years through ten years		2,756
	$	9,155

EARNINGS PER SHARE (Details) - shares	3 Months Ended	9 Months Ended
EARNINGS PER SHARE (Details) - shares	Jan. 31, 2020	Jan. 31, 2020
EARNINGS PER SHARE (Details) [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		185,000
Share-based Payment Arrangement, Option [Member]
EARNINGS PER SHARE (Details) [Line Items]
Weighted Average Number Diluted Shares Outstanding Adjustment	232,481	274,425

EARNINGS PER SHARE (Details) - Schedule of Earnings Per Share, Basic and Diluted - shares	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Weighted average shares outstanding:
Basic	9,104,288	8,927,710	9,059,251	8,899,110
Diluted	9,104,288	8,927,710	9,059,251	8,899,110

COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Details) [Line Items]
Revenues	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Loss on Contracts			2,400	300
Contracts Accounted for under Percentage of Completion [Member]
COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Details) [Line Items]
Revenues	$ 33,300	$ 12,900	$ 28,500	$ 8,500

COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Details) - Costs and Estimated Earnings in Excess of Billings, Net - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Costs and Estimated Earnings in Excess of Billings, Net [Abstract]
Costs and estimated earnings in excess of billings	$ 12,211	$ 8,278
Billings in excess of costs and estimated earnings	(4,200)	(1,608)
Net asset	$ 8,011	$ 6,670

TREASURY STOCK TRANSACTIONS (Details) - shares	9 Months Ended
TREASURY STOCK TRANSACTIONS (Details) - shares	Jan. 31, 2020	Jan. 31, 2019
Disclosure Text Block Supplement [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	25,718	30,257
Defined Contribution Plan, Employer Discretionary Contribution, Shares	6,109	5,829

INVENTORIES (Details) - USD ($) $ in Millions	Jan. 31, 2020	Apr. 30, 2019
UNITED STATES
INVENTORIES (Details) [Line Items]
Inventory, Net	$ 7.1	$ 6.6

INVENTORIES (Details) - Schedule of Inventory, Current - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Schedule of Inventory, Current [Abstract]
Raw Materials and Component Parts	$ 15,631	$ 11,600
Work in Progress	6,053	8,896
Finished Goods	1,803	2,860
	$ 23,487	$ 23,356

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Details) - USD ($)	9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Disclosure Text Block [Abstract]
Operating Leases, Rent Expense	$ 1,500,000	$ 504,000
Operating Lease, Cost	$ 441,000
Operating Lease, Weighted Average Remaining Lease Term	8 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	6.18%

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Details) - Lessee, Operating Lease, Disclosure - USD ($) $ in Thousands	Jan. 31, 2020	May 01, 2019	Apr. 30, 2019
Assets
Operating lease ROU assets	$ 11,197		$ 0
Liabilities
Operating lease liabilities (short-term)	2,059		0
Operating lease liabilities (long-term)	9,579		$ 0
Total lease liabilities	$ 11,638	$ 12,100

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Details) - Schedule of Future Minimum Rental Payments for Operating Leases $ in Thousands	Oct. 31, 2019 USD ($)
Schedule of Future Minimum Rental Payments for Operating Leases [Abstract]
2020	$ 1,316
2021	1,521
2022	1,436
2023	1,469
2024	1,502
Thereafter	6,349
Total future minimum lease payments	$ 13,593

RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Details) - Lessee, Operating Lease, Liability, Maturity - USD ($) $ in Thousands	Jan. 31, 2020	May 01, 2019	Apr. 30, 2019
Lessee, Operating Lease, Liability, Maturity [Abstract]
Remainder of 2020	$ 500
2021	1,919
2022	1,783
2023	1,801
2024	1,834
Thereafter	7,216
Total lease payments	15,053
Less imputed interest	(3,415)
Present value of future lease payments	11,638	$ 12,100
Less current obligations under leases	(2,059)		$ 0
Long-term lease obligations	$ 9,579		$ 0

SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		9 Months Ended
SEGMENT INFORMATION (Details) $ in Thousands	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)	Jan. 31, 2020 USD ($)	Jan. 31, 2019 USD ($)
SEGMENT INFORMATION (Details) [Line Items]
Number of Reportable Segments			2
Revenues	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Number Of Principal Markets	3		3
Revenues	$ 7,234	9,754	$ 24,029	28,076
POC Revenue [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	8,542	12,870	28,482	33,266
POC Revenue [Member] \| Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	6,124	9,412	21,215	26,611
POT Revenue [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	1,086	323	2,788	3,079
POT Revenue [Member] \| Frequency Electronics Inc New York [Member]
SEGMENT INFORMATION (Details) [Line Items]
Revenues	$ 1,110	$ 342	$ 2,814	$ 1,465

SEGMENT INFORMATION (Details) - Reconciliation of Revenue from Segments to Consolidated - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Revenues:
Revenues	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Frequency Electronics Inc New York [Member]
Revenues:
Revenues	7,234	9,754	24,029	28,076
Frequency Electronics Inc Zyfer [Member]
Revenues:
Revenues	2,787	3,644	8,487	8,746
Inter Segment [Member]
Revenues:
Revenues	$ (393)	$ (205)	$ (1,246)	$ (477)

SEGMENT INFORMATION (Details) - Reconciliation of Operating Profit (Loss) from Segments to Consolidated - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Operating (loss) income:
Operating profit (loss)	$ (1,561)	$ (394)	$ (7,263)	$ (540)
Frequency Electronics Inc New York [Member]
Operating (loss) income:
Operating profit (loss)	(1,493)	(939)	(6,967)	(1,745)
Frequency Electronics Inc Zyfer [Member]
Operating (loss) income:
Operating profit (loss)	8	847	(36)	1,305
Corporate Segment [Member]
Operating (loss) income:
Operating profit (loss)	$ (76)	$ (302)	$ (260)	$ (100)

SEGMENT INFORMATION (Details) - Schedule of Reconciliation of Assets from Segment to Consolidated - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
Identifiable assets:
Identifiable Assets	$ 90,168	$ 86,771
Frequency Electronics Inc New York [Member]
Identifiable assets:
Identifiable Assets	46,416	54,295
Frequency Electronics Inc Zyfer [Member]
Identifiable assets:
Identifiable Assets	14,252	10,478
Inter Segment [Member]
Identifiable assets:
Identifiable Assets	(8,586)	(8,346)
Corporate Segment [Member]
Identifiable assets:
Identifiable Assets	$ 38,086	$ 30,344

SEGMENT INFORMATION (Details) - Disaggregation of Revenue - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,234	9,754	24,029	28,076
Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,787	3,644	8,487	8,746
Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	(393)	(205)	(1,246)	(477)
POC Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	8,542	12,870	28,482	33,266
POC Revenue [Member] \| Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,124	9,412	21,215	26,611
POC Revenue [Member] \| Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	2,423	3,447	7,348	6,680
POC Revenue [Member] \| Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	(5)	11	(81)	(25)
POT Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,086	323	2,788	3,079
POT Revenue [Member] \| Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,110	342	2,814	1,465
POT Revenue [Member] \| Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	364	197	1,139	2,066
POT Revenue [Member] \| Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ (388)	$ (216)	$ (1,165)	$ (452)

SEGMENT INFORMATION (Details) - Revenue from External Customers by Products and Services - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Revenue from External Customer [Line Items]
Revenue	$ 9,628	$ 13,193	$ 31,270	$ 36,345
Satellite Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	5,272	5,987	14,704	17,289
Government Non-Space Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	3,165	6,639	12,680	17,058
Other Commercial & Industrial Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	$ 1,191	$ 567	$ 3,886	$ 1,998

INVESTMENT IN MORION, INC. (Details) - Morion Inc [Member] - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019	Apr. 30, 2019
INVESTMENT IN MORION, INC. (Details) [Line Items]
Cost Method Investment Ownership Percentage	4.60%		4.60%
Related Party Transaction, Purchases from Related Party	$ 332,000	$ 145,000	$ 712,000	$ 291,000
Revenue from Related Parties			49,000	2,000
Due to Related Parties	$ 169,000		169,000		$ 38,000
Proceeds from Dividends Received			$ 125,000	$ 250,000

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	9 Months Ended
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	Jan. 31, 2020	Jan. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Proceeds from Sale of Debt Securities, Available-for-sale	$ 3,000,000	$ 987,000
Available-for-sale Securities, Gross Realized Gains	$ 1,200	$ 2,000

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Schedule of Available-for-sale Securities Reconciliation - Fixed Income Securities [Member] - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jan. 31, 2020	Apr. 30, 2019
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Schedule of Available-for-sale Securities Reconciliation [Line Items]
Cost	$ 9,155	$ 8,152
Gross Unrealized Gains	305	71
Gross Unrealized Losses	0	(24)
Fair Market Value	$ 9,460	$ 8,199

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value - Fixed Income Securities [Member] - USD ($) $ in Thousands	Jan. 31, 2020	Apr. 30, 2019
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Line Items]
Fair Value, Less than 12 months	$ 161	$ 995
Unrealized Losses, Less than 12 months	0	(4)
Fair Value, 12 Months or more	0	3,349
Unrealized Losses, 12 Months or more	0	(20)
Fair Value	161	4,344
Unrealized Losses	$ 0	$ (24)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Investments Classified by Contractual Maturity Date - Fixed Income Securities [Member] $ in Thousands	Jan. 31, 2020 USD ($)
FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - Investments Classified by Contractual Maturity Date [Line Items]
Current	$ 2,164
Due after one year through five years	4,235
Due after five years through ten years	2,756
	$ 9,155

RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Thousands	Jan. 31, 2020	May 01, 2019
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating Lease, Liability	$ 11,638	$ 12,100