0001185185-22-001440 | 10-K/A | XBRL Viewer

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Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Apr. 30, 2022	Dec. 14, 2022	Oct. 31, 2021
Document Information Line Items
Entity Registrant Name	FREQUENCY ELECTRONICS, INC.
Trading Symbol	FEIM
Document Type	10-K/A
Current Fiscal Year End Date	--04-30
Entity Common Stock, Shares Outstanding		9,343,717
Entity Public Float			$ 63,400,000
Amendment Flag	true
Amendment Description	Frequency Electronics, Inc. (sometimes referred to as “Registrant,” “FEI,” “Frequency Electronics” or the “Company”) is filing this Amendment No. 1 to the Annual Report on Form 10-K for the fiscal year ended April 30, 2022 (this “Form 10-K/A”) to amend its Annual Report on Form 10-K for the fiscal year ended April 30, 2022, originally filed with the Securities and Exchange Commission (the “SEC”) on July 14, 2022 (the “Original Form 10-K”). As previously disclosed in the Current Report on Form 8-K filed on December 16, 2022, by the Company, on December 14, 2022, the Company’s management determined that the Original Form 10-K did not include a note to such financial statements explaining that the Company had amended its presentation of contract assets and contract liabilities for the fiscal year ended April 30, 2021 from a net basis presentation to a gross basis presentation, as required by United States generally accepted accounting principles. As a result of the foregoing, this Form 10-K/A amends and restates the following portions of the Original Form 10-K to make the following changes: ● Part I, Item 1A. “Risk Factors” is amended and restated to add an additional risk factor regarding the material weaknesses in the Company’s internal control over financial reporting; ● The “‘Safe Harbor’ Statement under the Private Securities Litigation Reform Act of 1995” is amended and restated to include reference to the additional risk regarding the material weaknesses in the Company’s internal control over financial reporting; ● Part II, Item 8. “Financial Statements and Supplementary Data” is amended and restated to (i) update Note 3 (Contract (Liabilities) Assets, Net) to the audited consolidated financial statements for the year ended April 30, 2022 explaining that the Company had amended its presentation of contract assets and contract liabilities for the fiscal year ended April 30, 2021 from a net basis presentation to a gross basis presentation on the consolidated balance sheet, as required by United States generally accepted accounting principles, (ii) make certain immaterial adjustments to correct a calculation error with respect to the presentation and disclosure of contract assets and contract liabilities for year ended April 30, 2022 and 2021 as described in Note 3 (Contract (Liabilities) Assets, Net) and (iii) update the Report of Independent Registered Public Accounting Firm; and ● The Company’s management determined it did not effectively design and maintain controls over the completeness and accuracy of the presentation of contract assets and contract liabilities for the fiscal year ended April 30, 2022 and the three-month period ended July 31, 2022. Additionally, the Company determined it did not have an adequate process for identifying and assessing the errors. Management concluded that these errors were deficiencies that constituted material weaknesses in the Company’s internal control over financial reporting and resulted in the material misstatement in the Original Form 10-K. Part II, Item 9A “Controls and Procedures” is amended and restated to reflect management’s conclusion that the Company’s internal control over financial reporting and disclosure controls and procedures were not effective as of April 30, 2022 due to the material weaknesses referred to above, and to describe the Company’s remediation plan for addressing such material weaknesses. No other changes have been made to the Original Form 10-K. This Form 10-K/A is presented as of the filing date of the Original Form 10-K and does not reflect events occurring after that date. All references herein to the “Annual Report on Form 10-K,” the “Annual Report” or this “Form 10-K” are hereinafter deemed to refer to this Form 10-K/A. As required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended, currently dated certifications by the Company’s chief executive officer and chief financial officer are filed as Exhibits 31.1, 31.2 and 32 to this Form 10-K/A.
Entity Central Index Key	0000039020
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	Apr. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
ICFR Auditor Attestation Flag	false
Document Annual Report	true
Document Transition Report	false
Entity File Number	1-8061
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	11-1986657
Entity Address, Address Line One	55 CHARLES LINDBERGH BLVD
Entity Address, City or Town	MITCHEL FIELD
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11553
City Area Code	516-794-4500
Local Phone Number	516-794-4500
Title of 12(b) Security	Common Stock (par value $1.00 per share)
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Auditor Name	BDO USA, LLP
Auditor Location	Melville, New York
Auditor Firm ID	243

Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Current assets:
Cash and cash equivalents	$ 11,561	$ 9,807
Marketable securities	9,964	10,313
Accounts receivable, net of allowance for doubtful accounts of $111 at April 30, 2022 and April 30, 2021	4,291	5,515
Contract assets	8,857	14,460
Inventories, net	19,906	19,661
Prepaid income taxes	269	444
Prepaid expenses and other	1,162	991
Total current assets	56,010	61,191
Property, plant and equipment, at cost, net of accumulated depreciation and amortization	8,564	9,612
Goodwill	617	617
Cash surrender value of life insurance	9,855	15,396
Other assets	909	1,939
Right-of-Use assets – operating leases	8,805	9,773
Total assets	84,760	98,528
Current liabilities:
Accounts payable – trade	1,080	1,080
Accrued liabilities	3,696	5,245
Loss provision accrual	4,243	57
Operating lease liability, current portion	1,744	1,715
Contract liabilities	11,098	12,512
Total current liabilities	21,861	20,609
Deferred compensation	8,730	14,017
Deferred taxes	8	8
Operating lease liability – non-current	7,353	8,366
Other liabilities	120	119
Total liabilities	38,072	43,119
Commitments and contingencies (Note 16)
Stockholders’ equity:
Preferred stock - $1.00 par value; authorized 600 shares, no shares issued
Common stock - $1.00 par value; authorized 20,000 shares, 9,298 shares issued and 9,297 shares outstanding at April 30, 2022; 9,226 shares issued and 9,225 shares outstanding at April 30, 2021	9,298	9,226
Additional paid-in capital	57,956	57,355
Accumulated deficit	(20,120)	(11,457)
Common stock reacquired and held in treasury – at cost (1 share at April 30, 2022 and April 30, 2021)	(6)	(6)
Accumulated other comprehensive income (loss)	(440)	291
Total stockholders’ equity	46,688	55,409
Total liabilities and stockholders’ equity	$ 84,760	$ 98,528

Consolidated Balance Sheets (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts (in Dollars)	$ 111	$ 111
Preferred stock, par value (in Dollars per share)	$ 1	$ 1
Preferred stock, shares authorized	600	600
Preferred stock, shares issued	0	0
Common stock, par value (in Dollars per share)	$ 1	$ 1
Common stock, shares authorized	20,000	20,000
Common stock shares issued	9,298	9,226
Common stock shares outstanding	9,297	9,225
Treasury stock, share	1	1

Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Revenues	$ 48,296,000	$ 54,254,000
Cost of revenues	39,697,000	37,333,000
Gross margin	8,599,000	16,921,000
Selling and administrative expenses	11,662,000	13,189,000
Research and development expenses	4,975,000	4,690,000
Operating loss	(8,038,000)	(958,000)
Other income (expense):
Investment income	199,000	458,000
Loss on disposal of asset	(110,000)	0
Loss on impairment of Morion	(796,000)	0
Interest expense	(77,000)	(127,000)
Other income (expense), net	160,000	1,103,000
(Loss) income before provision (benefit) from income taxes	(8,662,000)	476,000
Provision (benefit) from income taxes	1,000	(204,000)
Net (loss) income	$ (8,663,000)	$ 680,000
Net (loss) income per common share:
Basic and diluted (loss) earnings per share (in Dollars per share)	$ (0.93)	$ 0.07
Weighted average shares outstanding:
Basic (in Shares)	9,265,934	9,177,537
Diluted (in Shares)	9,265,934	9,248,425
Consolidated Statements of Comprehensive Income (Loss)
Net (loss) income	$ (8,663,000)	$ 680,000
Unrealized loss on marketable securities:
Change in market value of marketable securities before reclassification, net of tax	(726,000)	(177,000)
Reclassification adjustment for realized gains included in net income, net of tax	(5,000)	(22,000)
Total unrealized loss on marketable securities, net of tax	(731,000)	(199,000)
Comprehensive (loss) income	$ (9,394,000)	$ 481,000

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
Consolidated Statements of Cash Flows - USD ($)	Apr. 30, 2022	Apr. 30, 2021
Cash flows from operating activities:
Net (loss) income	$ (8,663,000)	$ 680,000
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	3,025,000	3,301,000
Non-cash lease expense	(16,000)	(281,000)
Provision for losses on accounts receivable, inventories, other assets and warranty reserve	328,000	(117,000)
Gain on marketable securities	(6,000)	(28,000)
Loss on sale of fixed and other assets, net	163,000	39,000
Loss on impairment of Morion	796,000	0
Employee benefit plans expense	842,000	1,495,000
Stock-based compensation expense	247,000	273,000
Changes in operating assets and liabilities:
Accounts receivable	1,574,000	(752,000)
Contract assets	5,246,000	(4,495,000)
Inventories	(464,000)	3,002,000
Prepaid expenses and other	(171,000)	714,000
Other assets	5,541,000	(584,000)
Accounts payable - trade	(1,000)	(205,000)
Accrued liabilities	(1,355,000)	765,000
Contract liabilities	(1,414,000)	9,500,000
Loss provision accrual	4,185,000	(690,000)
Income taxes refundable	175,000	405,000
Other liabilities	(5,996,000)	(865,000)
Net cash provided by operating activities	4,036,000	12,157,000
Cash flows from investing activities:
Purchase of marketable securities	(2,511,000)	(2,452,000)
Proceeds from sale or redemption of marketable securities	2,089,000	2,498,000
Capital expenditures	(1,860,000)	(1,239,000)
Net cash used in investing activities	(2,282,000)	(1,193,000)
Cash flows from financing activities:
Repayment of PPP loan	0	(4,965,000)
Net cash used in financing activities	0	(4,965,000)
Net increase in cash and cash equivalents	1,754,000	5,999,000
Cash and cash equivalents at beginning of year	9,807,000	3,808,000
Cash and equivalents at end of year	11,561,000	9,807,000
Cash paid during the year for:
Interest	77,000	123,000
Income taxes	15,000	0
Cash refund during the year for:
Income taxes	$ 183,000	$ 477,000

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, 2020	$ 9,164	$ 56,914	$ (12,137)	$ (195)	$ 490	$ 54,236
Balance (in Shares) at Apr. 30, 2020	9,163,940			42,696
Contribution of stock to 401(k) plan	$ 26	325		$ 68		419
Contribution of stock to 401(k) plan (in Shares)	26,192			(14,926)
Stock-based compensation expense	$ 4	269				$ 273
Stock-based compensation expense (in Shares)	4,200
Exercise of stock options and stock appreciation rights - net of	$ 32	(153)		$ 121
Exercise of stock options and stock appreciation rights - net of (in Shares)	31,936			(26,395)		247,500
Other comprehensive income (loss), net of tax					(199)	$ (199)
Net income (loss)			680			680
Balance at Apr. 30, 2021	$ 9,226	57,355	(11,457)	$ (6)	291	$ 55,409
Balance (in Shares) at Apr. 30, 2021	9,226,268			1,375		9,225,000
Contribution of stock to 401(k) plan	$ 44	382				$ 426
Contribution of stock to 401(k) plan (in Shares)	44,224
Stock-based compensation expense	$ 16	231				$ 247
Stock-based compensation expense (in Shares)	16,216
Exercise of stock options and stock appreciation rights - net of	$ 12	(12)
Exercise of stock options and stock appreciation rights - net of (in Shares)	11,470					42,875
Other comprehensive income (loss), net of tax					(731)	$ (731)
Net income (loss)			(8,663)			(8,663)
Balance at Apr. 30, 2022	$ 9,298	$ 57,956	$ (20,120)	$ (6)	$ (440)	$ 46,688
Balance (in Shares) at Apr. 30, 2022	9,298,178			1,375		9,297,000

Summary of Accounting Policies

12 Months Ended

Apr. 30, 2022

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

1. Summary of Accounting Policies

Basis of Presentation and Principles of Consolidation:

The consolidated financial statements include the accounts of Frequency Electronics, Inc. and its wholly-owned subsidiaries (the “Company” or “Registrant”). References to “FEI” are to the parent company alone and do not refer to any of its subsidiaries. The Company is principally engaged in the design, development and manufacture of precision time and frequency control products and components for microwave integrated circuit applications. See Note 13 for information regarding the Company’s business segments: (1) FEI-NY (which includes the subsidiaries FEI Government Systems, Inc., FEI Communications, Inc., and FEI-Elcom Tech, Inc. (“FEI-Elcom”)), and (2) FEI-Zyfer, Inc. (“FEI-Zyfer”). Intercompany accounts and transactions are eliminated in consolidation.

These consolidated financial statements have been prepared in conformity with United States generally accepted accounting principles (“U.S. GAAP”) and require management to make estimates and assumptions that affect amounts reported and disclosed in the consolidated financial statements and related notes. Actual results could differ from these estimates.

COVID-19 Pandemic and the CARES Act

On January 30, 2020, the World Health Organization (“WHO”) announced a global health emergency because of a new strain of coronavirus originating in Wuhan, China (“COVID-19”) and the risks to the international community as the virus spread globally beyond its point of origin. In March 2020, the WHO classified COVID-19 as a pandemic, based on the rapid increase in exposure globally.

The full impact of the COVID-19 pandemic continues to evolve as of the date of this report. As such, it is uncertain as to the full magnitude that the pandemic may ultimately have on the Company’s financial condition, liquidity, and future financial results. For the fiscal year ended April 30, 2022, the Company had been impacted by employee absenteeism related to direct or indirect effects of the COVID pandemic, delays in the receipt of anticipated new contracts from customers administratively affected by the pandemic and limited availability or delivery delays of parts and materials from vendors affected by the pandemic. FEI-Zyfer’s operations were particularly affected as evidenced by decreases in sales and gross margin during the fiscal year. Management is actively monitoring the impact of the global situation on its financial condition, liquidity, operations, suppliers, industry, and workforce. Given the continuing changing dynamics of the pandemic the Company is not able to estimate the potential adverse effects on its operations, financial condition, or liquidity for fiscal year 2023. As of April 30, 2022, the Company has returned to essentially normal operations and will continue to follow CDC and state guidelines with an emphasis on employee safety.

The Company faces various future COVID-19 related risks. The Company is dependent on its workforce to design and manufacture its products. If significant portions of the Company’s workforce are unable to work effectively, or if the U.S. Government, state and/or other customers or supplier operations are curtailed due to illness, quarantines, government actions, facility closures, or other restrictions, the Company’s operations may be impacted. If so, the Company may be unable to perform fully on its contracts and costs may increase. These cost increases may not be fully recoverable or adequately covered by insurance. In the latter part of fiscal year 2021, the Company did experience some operational disruptions due to the need to vacate certain areas of the facilities for cleaning and disinfecting resulting from employees being potentially exposed to COVID-19 or following positive COVID-19 test results. Also, certain Company vendors have been unable to deliver materials on time due to COVID-19 related impacts to their workforces or their supply chains. These delays impacted the Company’s production costs and schedules. Vendor delivery performance is being closely monitored and alternate sources of supply are generally available and, in some cases, are being established.

On March 27, 2020, President Trump signed into law the “Coronavirus Aid, Relief, and Economic Security (“CARES”) Act.” The CARES Act, among other things, included provisions relating to refundable payroll tax credits, deferment of employer side social security payments, net operating loss carryback periods, alternative minimum tax credit refunds, modifications to the net interest deduction limitations, increased limitations on qualified charitable contributions, and technical corrections to tax depreciation methods for qualified improvement property. The CARES Act also appropriated funds for the Small Business Administration (SBA) Paycheck Protection Program loans that are forgivable in certain situations to promote continued employment, as well as Economic Injury Disaster Loans to provide liquidity to small businesses harmed by the COVID-19 pandemic. The Company received a loan under the Paycheck Protection Program (“PPP”) in April 2020, which it repaid in full in May 2020.

Cash Equivalents:

The Company considers certificates of deposit and other highly liquid investments with maturities of three months or less when purchased to be cash equivalents. The Company places its temporary cash investments with high credit quality financial institutions. Such investments may at times be in excess of the Federal Deposit Insurance Corporation (“FDIC”) and Securities Investor Protection Corporation insurance limits. No losses have been experienced on such investments.

Marketable Securities:

Marketable securities consist of corporate debt securities, certificates-of-deposit, and debt securities of U.S. Government agencies. All marketable securities were held in the custody of one financial institution at April 30, 2022 and 2021. Investments in debt securities are categorized as available-for-sale and are carried at fair value, with unrealized gains and losses excluded from income and recorded directly to stockholders’ equity. The Company recognizes gains or losses when securities are sold using the specific identification method.

Allowance for Doubtful Accounts:

Losses from uncollectible accounts receivable are provided for by utilizing the allowance for doubtful accounts method based upon management’s estimate of uncollectible accounts. Management analyzes accounts receivable and the potential for bad debts, customer concentrations, credit worthiness, current economic trends and changes in customer payment terms when evaluating the amount recorded for the allowance for doubtful accounts.

Property, Plant and Equipment:

Property, plant and equipment is recorded at cost and include interest on funds borrowed to finance construction. Expenditures for renewals and betterments are capitalized; maintenance and repairs are charged to income when incurred. When fixed assets are sold or retired, the cost and related accumulated depreciation and amortization are eliminated from the respective accounts and any gain or loss is credited or charged to income.

If events or changes in circumstances indicate that the carrying amount of a long-lived asset may not be recoverable, the Company estimates the future cash flows expected to result from the use of the asset and its eventual disposition. If the sum of the expected future cash flows (undiscounted and without interest charges) is less than the carrying amount of the long-lived asset, an impairment loss is recognized. No impairment losses have been recognized in the years ended April 30, 2022 and 2021.

Inventories:

Inventories, which consist of finished goods, work-in-process, raw materials and components, are accounted for at the lower of cost (specific and average) and net realizable value.

Depreciation and Amortization:

Depreciation of property, plant and equipment is computed on the straight-line method based upon the estimated useful lives of the assets (40 years for buildings and 3 to 10 years for other depreciable assets). Leasehold improvements and equipment acquired under capital leases are amortized on the straight-line method over the shorter of the term of the lease or the useful life of the related asset.

Goodwill:

The Company records goodwill as the excess of purchase price over the fair value of identifiable net assets acquired. Goodwill is tested for impairment, on a reporting unit level qualitatively, on at least an annual basis at year end to determine whether it is more likely than not that the reporting unit’s fair value is less than its carrying amount. If it is determined that the carrying value of goodwill may not be recoverable, the Company will write down the goodwill to an amount to commensurate with the revised value of the acquired assets. The Company measures impairment based on revenue projections, recent transactions involving similar businesses and price/revenue multiples at which they were bought and sold, price/revenue multiples of competitors, and the present market value of publicly-traded companies in the Company’s industry. Management has determined that goodwill is not impaired as of April 30, 2022 and 2021.

Revenue and Cost Recognition:

Revenue is recognized when a performance obligation is satisfied, which is when the expected goods or services are transferred to the customer, in an amount that reflects the consideration to which the Company expects to receive. A performance obligation is a distinct product or service that is transferred to the customer based on the contract. The transaction price is allocated to each performance obligation and is recognized as revenue upon satisfaction of that performance obligation. The Company derives revenue from contracts with customers by units sold with specific specifications and frequencies that are used by a specific customer and contracts where the end user is The United States Government. The Company’s contracts typically include one performance obligation which is satisfied by shipped projects and completed services/reports required in the contract. Control over these performance obligations passes to the customer over time and therefore these revenues are reported in operating results over time using the percentage-of-completion (“POC”) cost-to-cost method. Under this method, revenue is recorded based upon the ratio that incurred costs bear to total estimated contract costs with related cost of revenues recorded as the costs are incurred. Each month management reviews estimated contract costs through a process of aggregating actual costs incurred and estimating additional costs to completion based upon the current available information and status of the contract. The effect of any change in the estimated gross margin rate for a contract is reflected in revenues in the period in which the change is known. Provisions for the full amount of anticipated losses on contracts are made in the period in which they become determinable.

For smaller contracts or orders sales of products and services to customers are reported in operating results based upon passage-of-title (“POT”) (i) shipment of the product or (ii) performance of the services pursuant to terms of the customer order. When payment is contingent upon customer acceptance of the installed system, revenue is deferred until such acceptance is received and installation completed. The Company’s products generally carry a one-year warranty, but may vary based on the contract terms.

Some judgment is used in evaluating the financial information for certain contracts to determine an appropriate budget and estimated cost. The Company evaluates this information continuously and bases its judgments on historical experience, design specifications, and expected costs for material and labor.

Contract costs include all direct material, direct labor costs, manufacturing overhead and other direct costs related to contract performance. Selling, general and administrative costs are charged to expense as incurred.

Practical Expedients

The Company expenses sales commissions as sales and marketing expenses in the period they are incurred if the expected amortization period is one year or less.

The Company expenses costs, other than sales commissions, to obtain a contract in the period for which they are incurred as these amounts would have been incurred even if the contract had not been obtained.

Disaggregation of Revenue

Total revenue recognized over time as POC method was approximately $46.4 million and $50.2 million of the $48.3 million and $54.3 million reported for the years ended April 30, 2022 and 2021, respectively. The amounts by segment and product line were as follows:

	Year Ended April 30, 2022
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,618		$	1,539		$	41,157
FEI-Zyfer		6,770			1,057			7,827
Intersegment		(1	)		(687	)		(688	)
Revenue	$	46,387		$	1,909		$	48,296

	Year Ended April 30, 2021
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,225		$	3,175		$	42,400
FEI-Zyfer		10,993			2,842			13,835
Intersegment		(10	)		(1,971	)		(1,981	)
Revenue	$	50,208		$	4,046		$	54,254

	Years Ended April 30,
	(in thousands)
	2022		2021
Revenues by Product Line:
Satellite Revenue	$	26,092	$	26,980
Government Non-Space Revenue		19,593		24,775
Other Commercial & Industrial Revenue		2,611		2,499
Consolidated revenues	$	48,296	$	54,254

Comprehensive Income (Loss):

Comprehensive income (loss) consists of net income or loss and other comprehensive income/loss. Other comprehensive income/loss includes changes in unrealized gains or losses, net of tax, on securities (for Fiscal 2022 and Fiscal 2021, debt securities) available for sale during the year.

Research and Development Expenses:

The Company engages in R&D activities to identify new applications for its core technologies, to improve existing products and to improve manufacturing processes to achieve cost reductions and manufacturing efficiencies. R&D costs include direct labor, manufacturing overhead, direct materials and contracted services. Such costs are expensed as incurred. The Company also engages in customer-funded R&D activity. The customer funds received in connection therewith appear in revenues and the associated expenses are included in cost of revenues and are not included in R&D expenses.

Income Taxes:

The Company recognizes deferred tax liabilities and assets based on the expected future tax consequences of events that have been included in the financial statements or tax returns. Under this method, deferred tax liabilities and assets are determined based on the difference between the financial statement and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Valuation allowances are established and adjusted when necessary to increase or reduce deferred tax assets to the amount expected to be realized.

The Company analyzes its tax positions under accounting standards which prescribe recognition thresholds that must be met before a tax benefit is recognized in the financial statements and provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure, and transition. An entity may only recognize or continue to recognize tax positions that meet a “more likely than not” threshold. Interest and penalties recognized on income taxes are recorded as income tax expense.

Earnings/Loss per Share:

Basic earnings/loss per share are computed by dividing net earnings/loss by the weighted average number of shares of common stock outstanding. Diluted earnings per share are computed by dividing net earnings by the sum of the weighted average number of shares of common stock and the if-converted effect of unexercised stock options and stock appreciation rights (“SARs”). Diluted earnings per share are not computed where the if-converted effect of such items would be anti-dilutive.

Fair Values of Financial Instruments:

Cash and cash equivalents, marketable securities, short-term credit obligations and debt and cash surrender value of life insurance are reflected in the accompanying consolidated balance sheets at amounts considered by management to reasonably approximate fair value based upon the nature of the instrument and current market conditions. Management is not aware of any factors that would significantly affect the value of these amounts. The Company also has an investment in a privately-held Russian company, Morion, Inc. (“Morion”). The Company is unable to reasonably estimate a fair value for this investment.

Equity-based Compensation:

The cost of employee services received in exchange for awards of equity instruments are based on the grant-date fair value of the award. We recognize the fair value of the award as compensation expense over the period during which an employee is required to provide service in exchange for the award.

Concentration of Credit Risk:

Financial instruments, which potentially subject the Company to concentration of credit risk, consist principally of cash and cash equivalents and trade receivables. The Company maintains cash accounts at several commercial banks at which the balances exceed FDIC limits. The Company has not experienced any losses on such amounts. Concentration of credit risk with respect to trade receivables is generally diversified due to the large number of entities comprising the Company’s customer base and their dispersion across geographic areas, principally within the U.S. The Company routinely addresses the financial strength of its customers and, as a consequence, believes that its receivable credit risk exposure is limited. The Company does not require customers to post collateral.

New Accounting Pronouncements:

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, 2022, 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 consolidated 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. The new guidance is effective for fiscal years beginning after December 15, 2022. The Company is evaluating the effect, if any, the update will have on its consolidated financial statements when adopted in fiscal year 2024.

Earnings Per Share

12 Months Ended

Apr. 30, 2022

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

2. Earnings per Share

Reconciliations of the weighted average shares outstanding for basic and diluted (loss) income per share for the years ended April 30, 2022 and 2021, respectively, were as follows:

	For the Years Ended April 30,
	2022		2021
Weighted average shares outstanding:
Basic EPS Shares outstanding (weighted average)		9,265,934		9,177,537
Effect of Dilutive Securities		**		70,888
Diluted EPS Shares outstanding		9,265,934		9,248,425

** For the year ended April 30, 2022, dilutive securities noted in the above table are excluded from the calculation of earnings per share since the inclusion of such shares would be antidilutive due to the net loss for the period. Additionally, there are anti-dilutive shares excluded in the above table for fiscal years ended April 30, 2022 and 2021 of 193,000 and 345,800, respectively.

Contract (Liabilities) Assets, Net (As Restated and As Revised)

12 Months Ended

Apr. 30, 2022

Contractors [Abstract]

Long-Term Contracts or Programs Disclosure [Text Block]

3. Contract (Liabilities) Assets, Net (As Restated and As Revised)

At April 30, 2022 and 2021, contract assets (liabilities), net, consisted of the following (in thousands):

	April 30, 2022			April 30, 2021
	(As Revised)			(As Restated)
Contract Assets	$	8,857		$	14,460
Contract Liabilities		(11,098	)		(12,512	)
Net (liability) asset	$	(2,241	)	$	1,948

Such amounts represent revenue recognized on long-term contracts that have 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. In general, the recorded amounts will be billed and collected or revenue recognized within twelve months of the balance sheet dates. Revenue on these long-term contracts are accounted for on the POC basis. During the years ended April 30, 2022 and 2021, revenue recognized under POC contracts was approximately $46.4 million and $50.2 million, respectively. If contract losses are anticipated, a loss provision is recorded for the full amount of such losses when they are determinable. Total contract losses for the fiscal years ended April 30, 2022 and 2021 were approximately $4.2 million and $1.0 million, respectively.

Restatement of Previously Issued Financial Statements

In the Company’s Annual Report on Form 10-K for the fiscal year ended April 30, 2022, filed on July 14, 2022 (the “Original Form 10-K”), the Company restated the consolidated balance sheet for the fiscal year ended April 30, 2021 to present contract assets and contract liabilities as gross amounts, as required under GAAP, as opposed to a net amount as previously presented. The amounts were previously presented as costs and estimated earnings in excess of billings, net, of $1.9 million, as opposed to gross amounts of contract assets of $12.6 million and contract liabilities of $10.7 million.

Revision of Previously Issued Financial Statements

In addition, the Company identified an immaterial error in the calculation to present the gross amounts of contract assets and contract liabilities in the Original Form 10-K. As a result, the Company is revising its consolidated financial statements and disclosures below for the periods impacted.

The table below sets forth the consolidated balance sheets and consolidated statements of cash flows, including the balances originally as filed, adjustments, and the revised balances for each revised period (in thousands):

	April 30, 2022								April 30, 2021
	As Filed		Adjustment			Revised			As Filed			Adjustment			Revised
Consolidated Balance Sheets:
Contract Assets	$	9,977	$	(1,120	)	$	8,857		$	12,640		$	1,820		$	14,460
Total Current Assets		57,130		(1,120	)		56,010			59,371			1,820			61,191
Total Assets		85,880		(1,120	)		84,760			96,708			1,820			98,528
Contract Liabilities		12,218		(1,120	)		11,098			10,692			1,820			12,512
Total Current Liabilities		22,981		(1,120	)		21,861			18,789			1,820			20,609
Total Liabilities		39,192		(1,120	)		38,072			41,299			1,820			43,119

Consolidated Statements of Cash Flows:
Changes in Operating Assets & Liabilities
Contract Assets	$	2,306	$	2,940		$	5,246		$	(2,180	)	$	(2,315	)	$	(4,495	)
Contract Liabilities		1,526		(2,940	)		(1,414	)		7,185			2,315			9,500
Net cash provided by operating activities		4,036		-			4,036			12,157			-			12,157

The table below sets forth the disclosures in Note 3 to the consolidated financial statements in the Original Form 10-K, including the balances originally as filed, adjustments, and the revised balances for each revised period (in thousands):

	April 30, 2022									April 30, 2021
	As Filed			Adjustment			Revised			As Filed			Adjustment			Revised
Contract Assets	$	9,977		$	(1,120	)	$	8,857		$	12,640		$	1,820		$	14,460
Contract Liabilities		(12,218	)		1,120			(11,098	)		(10,692	)		(1,820	)		(12,512	)
Net (liability) asset	$	(2,241	)	$	-		$	(2,241	)	$	1,948		$	-		$	1,948

The table below sets forth the segment information disclosures in Note 13 to the consolidated financial statements in the Original Form 10-K, including the balances originally as filed, adjustments, and the revised balances for each revised period (in thousands):

	April 30, 2022							April 30, 2021
	As Filed		Adjustment			Revised		As Filed		Adjustment		Revised
Identifiable assets:
FEI-NY	$	42,008	$	(1,120	)	$	40,888	$	45,552	$	1,820	$	47,372
Consolidated identifiable assets		85,880		(1,120	)		84,760		96,708		1,820		98,528

- Definition

The entire disclosure for long-term contracts or programs.

+ References

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+ Details

Inventories, Net

12 Months Ended

Apr. 30, 2022

Inventory Disclosure [Abstract]

Inventory Disclosure [Text Block]

4. Inventories, Net

Inventories, net at April 30, 2022 and 2021, respectively, consisted of the following (in thousands):

	April 30, 2022		April 30, 2021
Raw Materials and Component Parts	$	11,683	$	12,386
Work in Progress		7,746		6,259
Finished Goods		477		1,016
	$	19,906	$	19,661

Inventory reserves included in inventory were $7.5 million and $7.3 million for the fiscal years ended April 30, 2022 and 2021, respectively.

Property, Plant and Equipment, Net

12 Months Ended

Apr. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment Disclosure [Text Block]

5. Property, Plant and Equipment, Net

Property, plant and equipment, net at April 30, 2022 and 2021, consisted of the following (in thousands):

	April 30, 2022			April 30, 2021

Buildings and building improvements	$	2,576		$	2,721
Machinery, equipment and furniture		59,948			59,136
		62,524			61,857
Less accumulated depreciation		(53,960	)		(52,245	)
	$	8,564		$	9,612

Depreciation and amortization expense were $2.8 million and $2.9 million for the fiscal years ended April 30, 2022 and 2021, respectively.

Maintenance and repairs charged to operations was approximately $677,000 and $827,000 for the fiscal years ended April 30, 2022 and 2021, respectively.

Right-of-Use Assets and Lease Liabilities

12 Months Ended

Apr. 30, 2022

Disclosure Text Block [Abstract]

Lessee, Operating Leases [Text Block]

6. Right-of-Use Assets and Lease Liabilities

The Company’s leases primarily represent offices, warehouses, vehicles, manufacturing and R&D facilities which expire at various times through 2029 and are 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. 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 consolidated balance sheet.

The table below presents ROU assets and lease liabilities recorded on the consolidated balance sheets as follows:

	Classification	April 30, 2022		April 30, 2021
		(In thousands)
Assets
Operating lease ROU assets	Right-of-Use assets leases	$	8,805	$	9,773

Liabilities
Operating lease liabilities (short-term)	Lease liability, current		1,744		1,715
Operating lease liabilities (long-term)	Lease liability, non-current		7,353		8,366
Total lease liabilities		$	9,097	$	10,081

Total operating lease expense was approximately $1.6 million for the fiscal years ended April 30, 2022 and 2021, the majority of which is included in cost of revenues and the remaining amount in selling and administrative expenses on the consolidated statements of operations. In addition, we made cash payments of $2.0 million for operating leases during the fiscal years ended April 30, 2022 and 2021, which are included in cash flows from operating activities in our consolidated statement of cash flows. As of April 30, 2022, the Company had no operating lease liabilities that had not commenced.

The table below reconciles the undiscounted cash flows for each of the first five fiscal years and total of the remaining fiscal years to the operating lease liabilities recorded on the consolidated balance sheet as of April 30, 2022:

Fiscal Year Ending April 30,
(in thousands)

2023	$	1,796
2024		1,993
2025		1,832
2026		1,317
2027		937
Thereafter		3,239
Total lease payments		11,114
Less imputed interest		(2,017	)
Present value of future lease payments		9,097
Less current obligations under leases		(1,744	)
Long-term lease obligations	$	7,353

As of April 30, 2022, the weighted-average remaining lease term for all operating leases was 6.3 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 April 30, 2022 was 6.16%.

Marketable Securities

12 Months Ended

Apr. 30, 2022

Investments, Debt and Equity Securities [Abstract]

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

7. Marketable Securities

The cost, gross unrealized gains, gross unrealized losses and fair market value of available-for-sale securities at April 30, 2022 and 2021, respectively, were as follows (in thousands):

	April 30, 2022
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,403	$	23	$	(462	)	$	9,964

	April 30, 2021
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,022	$	393	$	(102	)	$	10,313

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
April 30, 2022
Fixed Income Securities	$	2,349	$	(146	)	$	5,573	$	(316	)	$	7,922	$	(462	)

April 30, 2021
Fixed Income Securities	$	1,793	$	(52	)	$	614	$	(50	)	$	2,407	$	(102	)

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 April 30, 2022 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.

Proceeds from the sale or redemption of available-for-sale securities and the resulting gross realized gains and losses included in the determination of net income (loss) for the years ended April 30, 2022 and 2021, respectively, were as follows (in thousands):

	For the years ended April 30,
	2022		2021
Proceeds	$	2,089	$	2,498
Gross realized gains	$	6	$	28
Gross realized losses	$	-	$	-

Maturities of fixed income securities classified as available-for-sale at April 30, 2022 were as follows (at cost, in thousands):

Current	$	3,025
Due after one year through five years		5,694
Due after five years		1,684
	$	10,403

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. The Company’s money market, business account, and U.S. securities are valued on a Level 1 basis. The Company’s fixed income corporate debt securities and certificates of deposit are valued on a Level 2 basis. Level 2 securities are valued at the closing prices and are consistent with quoted prices of similar assets reported in active markets.

Debt Obligations

12 Months Ended

Apr. 30, 2022

Debt Disclosure [Abstract]

Debt Disclosure [Text Block]

8. Debt Obligations

As of April 30, 2022 and 2021, the Company had available credit with UBS Bank USA at variable terms based on its securities holdings under an advisory arrangement, under which no borrowings have been made.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

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+ Details

Accrued Liabilities

12 Months Ended

Apr. 30, 2022

Payables and Accruals [Abstract]

Accounts Payable and Accrued Liabilities Disclosure [Text Block]

9. Accrued Liabilities

Accrued liabilities at April 30, 2022 and 2021, respectively, consisted of the following (in thousands):

	2022		2021
Vacation and other compensation	$	1,523	$	1,564
Incentive compensation		100		550
Payroll taxes		112		167
Warranty reserve		519		439
Commissions		263		329
Deferred compensation payable		469		704
Other		710		1,492
	$	3,696	$	5,245

Investment in Morion, Inc.

12 Months Ended

Apr. 30, 2022

Investment Holdings Abstract

Investment Holdings [Text Block]

10. Investment in Morion, Inc.

The Company has an investment in Morion, a privately-held Russian company, which manufactures high precision quartz resonators and crystal oscillators. The Company has also licensed certain technology to Morion.

The Company’s investment consists of 4.6% of Morion’s outstanding shares, accordingly, the Company accounted for its investment in Morion on the cost basis. During the fiscal years ended April 30, 2022 and 2021, the Company acquired product from Morion in the aggregate amount of approximately $215,000 and $710,000, respectively. During the fiscal years ended April 30, 2022 and 2021, the Company sold product and training services to Morion in the aggregate amount of approximately $23,000 and $94,000, respectively, included in revenues in the consolidated statements of operations as part of the FEI-NY segment. During the fiscal years ended April 30, 2022 and 2021, the Company received dividends from Morion in the amount of approximately $123,000 and $105,000, respectively, which is included in other income, net in the consolidated statements of operations as part of the FEI-NY segment. Purchases of materials from Morion consist mainly of quartz crystal blanks which are used in the fabrication of quartz resonators. In the event that these items become unavailable from Morion, the Company is in the process of establishing alternate sources of supply. The Company is also capable of fabricating the crystal blanks in-house.

Morion is a less than wholly-owned subsidiary of Gazprombank, a state-owned Russian bank. The U.S. Ukraine-related sanctions regime has since 2014 included a list of SSI pursuant to Executive Order 13662, which prohibits certain transactions, including certain extensions of credit, with an entity designated as an SSI or certain affiliates of an entity designated as an SSI. On July 16, 2014, after the Company’s investment in Morion, Gazprombank was designated as an SSI.

As previously disclosed, in light of Morion’s relationship with Gazprombank, in 2020, the Company evaluated, with the assistance of external legal counsel, certain sales to Morion and the timing of payments by Morion to the Company in connection with those sales to determine whether payments by Morion may have inadvertently constituted extensions of credit in violation of Directive 1 under Executive Order 13662. The Company determined that certain payments by Morion – the majority of which occurred more than five years ago – were not timely. Following the evaluation, on May 7, 2020, the Company voluntarily disclosed its findings to the Office of Foreign Assets Control (“OFAC”). The Company’s voluntary disclosure to OFAC related solely to delays in collection of accounts receivable that exceeded then-applicable payment windows set forth in sanctions regulations and did not relate to any other type of payment or transaction. On February 17, 2021, the Company received a Cautionary Letter from OFAC indicating that OFAC has completed its review of the matter. According to OFAC, the Cautionary Letter was issued instead of pursuing a civil monetary penalty or taking other enforcement action.

Due to the current Russia-Ukraine conflict and resulting sanctions, the future status of FEI’s equity investment in Morion is uncertain. In response to these conditions, in connection with the preparation of the audited financial statements included in this annual report on Form 10-K, the Company impaired its investment in Morion in full. The impairment of $796,000 is included in other income (expense), net, in the consolidated statements of operations for the fiscal year ended April 30, 2022. The likelihood of future sales to, purchases, and dividend payments from Morion is questionable.

Employee Benefit Plans

12 Months Ended

Apr. 30, 2022

Disclosure Text Block Supplement [Abstract]

Compensation and Employee Benefit Plans [Text Block]

11. Employee Benefit Plans

Profit Sharing Plan:

The Company provides its U.S.-based employees with a profit-sharing plan and trust under § 401(k) of the IRC. This plan allows all eligible employees to defer a portion of their income through voluntary contributions to the plan. In accordance with the provisions of the plan, the Company can make discretionary matching contributions in the form of cash or common stock. For the years ended April 30, 2022 and 2021, the Company contributed 44,224 and 41,118 shares of common stock, respectively. The approximate value of these shares at the date of contribution was $426,000 and $419,000 in fiscal years 2022 and 2021, respectively. Contributed shares are drawn from the Company’s common stock held in treasury, and are removed at the Company’s original cost of acquisition of such shares on a specific identification basis, and from the Company’s common stock. In addition to changes in the treasury stock accounts, during fiscal years 2022 and 2021, such transactions increased additional paid in capital by $382,000 and $325,000, respectively. As of April 30, 2022, the plan held a total of 499,738 shares, which were allocated to the accounts of the individual participants. As of April 30, 2021, the plan held a total of 498,115 shares, which were allocated to the accounts of the individual participants.

Income Incentive Pool:

The Company maintains incentive bonus programs for certain employees which are based on operating profits of the individual subsidiaries to which the employees are assigned. The Company also adopted a plan for the President and Chief Executive Officer of the

Company, which the formula is based on consolidated pre-tax profits. The incentive bonus recorded for the fiscal year ended April 30, 2022 was $100,000. The incentive bonus recorded for the fiscal year ended April 30, 2021 was $550,000.

Employee Stock Plans:

The Company has various stock plans, some of which have been approved by the Company’s stockholders, for key management employees, including officers and directors who are employees, certain consultants and independent members of the Board of Directors. The plans are Nonqualified Stock Options (“NQSO”) plans, Incentive Stock Option (“ISO”) plans, and SAR plans. Under these plans, options or SARs are granted at the discretion of the Stock Option Committee at an exercise price not less than the fair market value of the Company’s common stock on the date of grant.

Typically, options and SARs vest over a four-year period from the date of grant. The options and SARs generally expire ten years after the date of grant (the most recent SARs awards, beginning in fiscal year 2017, expire in five years) and are subject to certain restrictions on transferability of the shares obtained on exercise. Under the Company’s 2005 Stock Award Plan (“Plan”) the Company provided option holders the opportunity to exercise stock options either by paying the exercise price for the shares or to do a cashless exercise whereby the individual receives the net number of shares of stock equal in value to the exercised number of shares times the difference between the current market value of the Company’s stock and the exercise price. Under the Plan, instruments granted under other plans which expire, are canceled, or are tendered in the exercise of such instruments, increase the shares available under the Plan.

As of April 30, 2022, eligible employees and directors had been granted total SARs representing approximately 2,385,000 shares of the Company’s common stock, of which approximately 429,000 shares were outstanding and approximately 394,000 shares with a weighted average exercise price of $10.06 were exercisable. There were no SARs granted during the fiscal year 2022. When the SARs become exercisable, the Company will settle the SARs by issuing to exercising recipients the number of shares of stock from common stock or treasury stock, if available, equal to the appreciated value of the Company’s stock between the grant date and exercise date. At the time of exercise, the quantity of shares under the SARs grant equal to the exercise value divided by the then market value of the shares will be returned to the pool of available shares for future grant under the Plan. During the year ended April 30, 2022, employees exercised SARs representing 42,875 shares of the Company’s common stock and received 11,470 shares of Company stock. The difference of 31,405 shares was returned to the pool of available shares and may be used for future grants.

The excess of the consideration received over the par value of the common stock or cost of treasury stock issued under both types of option plans is recognized as an increase in additional paid-in capital.

The following table summarizes information about stock option and SARs activity for the years ended April 30, 2022 and 2021:

	Stock Options and Stock Appreciation Rights
						Weighted Average
				Weighted-Average		Remaining	Aggregate
	Shares			Exercise Price		Contractual Term	Intrinsic Value
Outstanding – April 30, 2020		1,059,500		$	9.74	2.2 years	$	5,416,783
Granted		-			-
Exercised		(247,500	)		8.42			573,418
Expired or Canceled		(197,000	)		10.96
Outstanding – April 30, 2021		615,000		$	9.88	1.8 years	$	2,141,905
Granted		-			-
Exercised		(42,875	)		7.30			34,660
Expired or Canceled		(143,000	)		10.48
Outstanding – April 30, 2022		429,125		$	9.94	1.3 years	$	3,278,704
Exercisable		393,500		$	10.06	1.4 years	$	2,989,785
Available for future grants		906,653

As of April 30, 2022, total unrecognized compensation cost related to non-vested options and SARs under the plans was approximately $7,000. These costs are expected to be recognized over a weighted average period of less than 1.0 years.

During the years ended April 30, 2022 and 2021, 41,875 and 85,625 shares, respectively, vested, the fair value of which was approximately $123,000 and $274,000, respectively.

Stock-based compensation costs capitalized as part of work in process inventory or included in the cost of sales of programs on which the Company recognizes revenue under the POC method were approximately $92,000 and $103,000 for the years ended April 30, 2022 and 2021, respectively. Selling and administrative expenses included stock-based compensation expense of approximately $144,000 and $160,000 for the years ended April 30, 2022 and 2021, respectively.

The Company classifies cash flows resulting from the tax benefits from tax deductions recognized upon the exercise of stock options or SARs (tax benefits) as operating cash flows. The Company did not recognize any tax benefits from the exercise of stock options and SARs for the fiscal years presented.

Restricted Stock Plan and Other Issuances:

During fiscal year 1990, the Company adopted a Restricted Stock Plan which provided that key management employees could be granted rights to purchase an aggregate of 375,000 shares of the Company’s common stock. The grants, transferability restrictions and purchase price were determined at the discretion of a special committee of the Board of Directors. The purchase price could not be less than the par value of the common stock. Transferability of shares is restricted for a four-year period, except in the event of a change in control as defined therein. As a result of the adoption by the Company’s stockholders of the 2005 Stock Award Plan, the Restricted Stock Plan was discontinued. No additional grants will be made under this plan. As of April 30, 2021, there are no outstanding shares available for purchase.

Under the 2005 Stock Award Plan the Company begin issuing Restricted Stock Units (“RSUs”) to eligible employees in fiscal 2020. The fair value of these awards is equivalent to the market value of the Company’s common stock on the grant date and vests over a period of time. On the applicable vesting date, the holder of a RSU becomes entitled to share of the Company’s common stock. A portion of the RSUs awarded will vest annually until fiscal 2026.

During the year ended April 30, 2022 and 2021, the Company issued 1,150 shares from common stock and 950 shares from common stock, respectively, to select employees for milestone years of service to the Company. These shares were issued under the 2005 Stock Award Plan, are shares of the Company’s common stock, and are fully vested at time of issuance.

In fiscal year 2021 the Company elected to issue Performance Stock Units (“PSUs”) to an officer of the Company. The fair value of these awards is equivalent to the market value of the Company’s common stock on the grant date and requires an assessment of the probability that the specified performance criteria will be achieved, which is updated at each reporting date. PSUs are not shares of the Company’s common stock and do not have any rights or privileges thereof, including voting or dividend rights. On the applicable vesting date, subject to the attainment of the specified performance criteria, the holder of a PSU becomes entitled to a share of the Company’s common stock. PSUs are subject to certain restrictions and forfeiture provisions, in addition to performance vesting conditions, prior to vesting. A portion of the PSUs awarded will vest annually until fiscal 2025.

The following table summarizes activity for the RSUs and PSUs awards that reduce available capacity under the 2005 Stock Award Plan for the years ended April 30, 2022 and 2021:

				Weighted-Average
	Shares			Exercise Price
Balance – April 30, 2020		13,000			11.38
Granted		47,250			10.03
Vested		(3,250	)		11.38
Balance – April 30, 2021		57,000			10.26
Granted		26,250			9.84
Vested		(15,066	)		10.32
Forfeited		(2,575	)		9.97
Balance – April 30, 2022		65,609			10.09

Deferred Compensation Agreements:

The Company has a series of agreements with key employees providing for the payment of benefits upon retirement or death. Under these agreements, each key employee receives specified retirement payments for the remainder of the employee’s life with a minimum payment of ten years’ benefits to either the employee or his or her beneficiaries. The agreements also provide for lump sum payments upon termination of employment without cause and reduced benefits upon early retirement. The Company pays the benefits out of its working capital but has also purchased whole life or term life insurance policies on the lives of certain of the participants to cover the optional lump sum obligations of the agreements upon the death of the participant. Deferred compensation expense charged to selling and administrative expenses during the years ended April 30, 2022 and 2021 was approximately $1.1 million each fiscal year.

Life Insurance Policies and Cash Held in Trust:

The whole-life insurance policies on the lives of certain participants covered by deferred compensation agreements have been placed in a trust. Upon the death of any insured participant, cash received from life insurance policies in excess of the Company’s deferred compensation obligations to the estate or beneficiaries of the deceased, are also placed in the trust. These assets belong to the Company until a change of control event, as defined in the trust agreement, should occur. At that time, the Company is required to add sufficient cash to the trust so as to match the deferred compensation liability described above. Such funds will be used to continue the deferred compensation arrangements following a change of control.

Income Taxes

12 Months Ended

Apr. 30, 2022

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

12. Income Taxes

The (benefit) provision for income taxes consisted of the following (in thousands):

	Year Ended April 30,
	2022		2021
Current:
Federal	$	-	$	(119	)
State		1		(85	)
Current (benefit) provision		1		(204	)
Deferred:
Federal		-		-
State		-		-
Deferred tax (benefit) provision		-		-

Total (benefit) provision	$	1	$	(204	)

The following table reconciles the reported income tax (benefit) provision, recorded primarily due to the (i) recognition of previously unrecognized tax benefits, (ii) state and local taxes, (iii) and a change in the valuation allowance, with the amount computed using the federal statutory income tax rate (in thousands):

	Year Ended April 30,
	2022			2021
Statutory rate	$	(1,819	)	$	100
State and local tax		(163	)		69
Valuation allowance on deferred tax assets		1,050			961
Nondeductible expenses		(11	)		2
Uncertain tax positions		1			(898	)
Nontaxable life insurance cash value increase		(47	)		(63	)
Taxable life insurance gain		783			128
Stock Compensation		86			242
Tax credits		(219	)		(434	)
Change in tax rate		209			(323	)
Other items		131			12
Total (benefit) provision	$	1		$	(204	)

The components of deferred taxes are as follows (in thousands):

	Year Ended April 30,
	2022			2021
Deferred tax assets:
Employee benefits	$	3,047		$	4,789
Inventory		2,958			1,946
Accounts receivable		118			119
Tax credits		2,306			2,027
Other assets		981			883
Lease Liability		2,284			2,593
Capital Loss carry-forward		2,513			2,602
Net operating loss carryforwards		7,574			6,203
Total deferred tax asset		21,781			21,162
Deferred tax liabilities:
Property, plant and equipment		(461	)		(666	)
Right of use asset		(2,211	)		(2,514	)
Other liabilities		(83	)		(195	)
Deferred state income tax		(943	)		(932	)
Net deferred tax asset		18,083			16,855
Valuation allowance		(18,091	)		(16,863	)
Net deferred tax (liability) asset	$	(8	)	$	(8	)

In assessing the potential for realization of deferred tax assets, the Company considers whether it is more-likely-than-not that some portion or all of the deferred tax assets will be realized. A valuation allowance, if needed, reduces the deferred tax assets to the amounts expected to be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income in those periods in which temporary differences become deductible and/or net operating loss carryforwards can be utilized. We assess all positive and negative evidence when determining the amount of the net deferred tax assets that are more likely than not to be realized. This evidence includes, but is not limited to, prior earnings history, scheduled reversal of taxable temporary differences, tax planning strategies and projected future taxable income. Significant weight is given to positive and negative evidence that is objectively verifiable. As of April 30, 2022 and 2021, we have a full valuation allowance against our U.S. net deferred tax assets. If these estimates and assumptions change in the future, the Company may be required to reduce its existing valuation allowance resulting in less income tax expense.

For the year ended April 30, 2022, the valuation allowance increased by approximately $1.2 million from the prior year primarily due an increase in the net deferred tax asset for which no tax benefit was provided.

The Company has a net deferred tax liability related to the tax effect of differences between financial reporting and tax basis of intangible assets that are not expected to reverse within the Company’s net operating loss carryforward periods. The utilization of indefinite lived net operating losses are limited to 80% of taxable income in an annual period.

As of April 30, 2022, the Company has U.S. federal net operating losses of $29.6 million of which $15.9 million begins to expire in fiscal years 2026 through 2038, including $3.4 million which is subject to annual limitation under IRC § 382. The remaining U.S. federal net operating losses of $13.7 million have an indefinite carry-forward period. The U.S. federal capital loss carry-forward of $9.9 million expires in fiscal year 2023. U.S. federal R&D credits of $1.0 million begin to expire in fiscal years 2036 through 2040. The Company also has state net operating loss carryforwards, and state tax credits that expire in various years and amounts.

A reconciliation of the beginning and ending amounts of unrecognized tax benefits, is as follows (in thousands):

	2022		2021
Balance at the beginning of the fiscal year	$	119	$	1,354
Additions based on positions taken in the current year		111		-
Additions based on positions taken in prior years		-		-
Decreases based on positions taken in prior years		-		-
Lapse in statute of limitations		-		(1,235	)
Balance at the end of the fiscal year	$	230	$	119

The entire amount reflected in the above table at April 30, 2022, if recognized, would reduce our effective tax rate. As of April 30, 2022, and 2021, the Company had $1,176 and $0, respectively, accrued for the payment of interest and penalties. For the fiscal years ended April 30, 2022 and 2021, the Company recognized interest (income) and expense of $1,176 and $(119,000), respectively. Although it is difficult to predict or estimate the change in the Company’s unrecognized tax benefits over the next twelve months, the Company believes no additional amounts will be recognized in the next twelve months.

The Company is subject to taxation in the U.S. federal, various state and local, and foreign jurisdictions. The Company is no longer subject to examination of its U.S. federal income tax returns by the Internal Revenue Service for fiscal years 2018 and prior. The Company is no longer subject to examination by the taxing authorities in foreign jurisdictions for fiscal years 2018 and prior. Net operating losses and tax attributes generated in closed years and utilized in open years are subject to adjustment by the tax authorities.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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+ Details

Segment Information

12 Months Ended

Apr. 30, 2022

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

13. 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- communication 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. This segment also provides sales and support for the Company’s wireline telecommunications family of products, including US5G, which are sold in the U.S. market.

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 Note 1. 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 table below presents information about reported segments for each of the years ended April 30, 2022 and 2021, respectively, with reconciliation of segment amounts to consolidated amounts as reported in the consolidated statements of operations or the consolidated balance sheets for each of the years (in thousands):

	For the Years Ended April 30,
	2022			2021
Revenues:
FEI-NY	$	41,157		$	42,400
FEI-Zyfer		7,827			13,835
less intersegment revenues		(688	)		(1,981	)
Consolidated revenues	$	48,296		$	54,254

Operating (loss) income:
FEI-NY	$	(5,679	)	$	(1,067	)
FEI-Zyfer		(2,104	)		655
less intersegment revenues		79			(204	)
Corporate		(334	)		(342	)
Consolidated operating loss	$	(8,038	)	$	(958	)

	For the Years Ended April 30,
	2022			2021
	(As Revised)			(As Revised)
Identifiable assets:
FEI-NY	$	40,888		$	47,372
FEI-Zyfer		10,522			12,897
less intersegment balances		(126	)		-
Corporate		33,476			38,259
Consolidated identifiable assets	$	84,760		$	98,528

Depreciation and amortization (allocated):
FEI-NY	$	2,798	$	3,110
FEI-Zyfer		227		191
Corporate		-		-
Consolidated depreciation and amortization expense	$	3,025	$	3,301

Major Customers

The Company’s products are sold to both commercial and governmental customers. For the fiscal years ended April 30, 2022 and 2021, approximately 94% and 91%, respectively, of the Company’s sales were made under contracts to the U.S. Government or subcontracts for U.S. Government end-use.

In the fiscal years ended April 30, 2022 and 2021, revenues to four and three customers, respectively, of the FEI-NY segment accounted for more than 10% of that segment’s revenues. In the FEI-Zyfer segment, two and three customers, respectively, accounted for more than 10% of that segment’s revenues in the fiscal years ended April 30, 2022 and 2021.

The loss by the Company of any one of these customers would have a material adverse effect on the Company’s business. The Company believes its relationship with these customers is mutually satisfactory. Sales to the major customers referenced above can include commercial and governmental end users.

Foreign Sales

Revenues in each of the Company’s segments include sales to foreign governments or to companies located in foreign countries. For the years ended April 30, 2022 and 2021, revenues, based on the location of the procurement entity and excluding intersegment sales, were derived from the following countries (in thousands):

	2022		2021
Belgium	$	-	$	36
Brazil		368		106
France		-		123
China		-		215
Russia		23		94
Germany		17		31
Italy		35		27
Israel		7		82
Singapore		-		32
Taiwan		-		101
United Kingdom		198		261
Other		233		315
	$	881	$	1,423

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (d)
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8657-108599

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 21
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8721-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI https://asc.fasb.org/topic&trid=2134510

+ Details

Product Warranties

12 Months Ended

Apr. 30, 2022

Product Warranties Disclosures [Abstract]

Product Warranty Disclosure [Text Block]

14. Product Warranties

The Company generally provides its customers with a one-year warranty regarding the manufactured quality and functionality of its products. For some limited products, the warranty period has been extended. The Company establishes warranty reserves based on its product history, current information on repair costs and annual sales levels. As of April 30, 2022 and 2021, respectively, changes in the carrying amount of accrued product warranty costs, reported in accrued expenses on the consolidated balance sheets, were as follows (in thousands):

	2022			2021
Balance at beginning of year	$	439		$	527
Warranty costs incurred		(587	)		(619	)
Product warranty accrual		667			531
Balance at end of year	$	519		$	439

Other Comprehensive Income (Loss)

12 Months Ended

Apr. 30, 2022

Disclosure Text Block Supplement [Abstract]

Other Comprehensive Income, Noncontrolling Interest [Text Block]

15. Other Comprehensive Income (Loss)

Changes in Accumulated Other Comprehensive Income (Loss) (“AOCI”) by component and reclassifications from AOCI to Other income (expense), net, for the years ended April 30, 2022 and 2021, respectively, were as follows (in thousands):

	Change in
	Market Value
	of Marketable
	Securities
Balance April 30, 2020, net of taxes				$	490
Items of other comprehensive income (loss) before reclassification, pretax					(171	)
Tax effect					(6	)
Items of other comprehensive income (loss) before reclassification, net of taxes					(177	)
Reclassification adjustments, pretax **		(28	)
Tax effect		6			(22	)
Total other comprehensive income (loss), net of taxes					(199	)
Balance April 30, 2021, net of taxes					291
Items of other comprehensive income (loss) before reclassification, pretax					(725	)
Tax effect					(1	)
Items of other comprehensive income (loss) before reclassification, net of taxes					(726	)
Reclassification adjustments, pretax **		(6	)
Tax effect		1			(5	)
Total other comprehensive income (loss), net of taxes					(731	)
Balance April 30, 2022, net of taxes					(440	)

**The reclassification adjustments represent net realized gains on the sale or redemption of available-for-sale marketable securities that were reclassified from AOCI to Other income (expense), net.

Contingencies

12 Months Ended

Apr. 30, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

16. Contingencies

On August 25, 2021, the Company settled disputes with Mr. Bloch. Under the Agreement on Material Terms of Settlement (the “Settlement Terms”), dated August 25, 2021, between and among the Company, Jonathan Brolin, Lance W. Lord, Russell M. Sarachek, Richard Schwartz and Stanton D. Sloane, each in their capacity as members of the Board, and the Compensation Committee of the Company’s Board, in its capacity as administrator under the deferred compensation agreements, and Mr. Bloch and certain members of Mr. Bloch’s family, in full and complete settlement of all claims asserted and all sums sought by Mr. Bloch in the litigation and arbitration proceedings, the Company agreed to pay Mr. Bloch $6 million on or before September 24, 2021. The final settlement occurred on September 21, 2021.

Accounting Policies, by Policy (Policies)

12 Months Ended

Apr. 30, 2022

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

Basis of Presentation and Principles of Consolidation:

COVID-19 Pandemic and the CARES Act, Policy [Policy Text Block]

COVID-19 Pandemic and the CARES Act

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash Equivalents:

Marketable Securities, Policy [Policy Text Block]

Marketable Securities:

Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block]

Allowance for Doubtful Accounts:

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment:

Inventory, Policy [Policy Text Block]

Inventories:

Inventories, which consist of finished goods, work-in-process, raw materials and components, are accounted for at the lower of cost (specific and average) and net realizable value.

Depreciation, Depletion, and Amortization [Policy Text Block]

Depreciation and Amortization:

Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]

Goodwill:

Revenue [Policy Text Block]

Revenue and Cost Recognition:

Practical Expedients

The Company expenses sales commissions as sales and marketing expenses in the period they are incurred if the expected amortization period is one year or less.

Disaggregation of Revenue

	Year Ended April 30, 2022
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,618		$	1,539		$	41,157
FEI-Zyfer		6,770			1,057			7,827
Intersegment		(1	)		(687	)		(688	)
Revenue	$	46,387		$	1,909		$	48,296

	Year Ended April 30, 2021
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,225		$	3,175		$	42,400
FEI-Zyfer		10,993			2,842			13,835
Intersegment		(10	)		(1,971	)		(1,981	)
Revenue	$	50,208		$	4,046		$	54,254

	Years Ended April 30,
	(in thousands)
	2022		2021
Revenues by Product Line:
Satellite Revenue	$	26,092	$	26,980
Government Non-Space Revenue		19,593		24,775
Other Commercial & Industrial Revenue		2,611		2,499
Consolidated revenues	$	48,296	$	54,254

Comprehensive Income, Policy [Policy Text Block]

Comprehensive Income (Loss):

Research and Development Expense, Policy [Policy Text Block]

Research and Development Expenses:

Income Tax, Policy [Policy Text Block]

Income Taxes:

Earnings Per Share, Policy [Policy Text Block]

Earnings/Loss per Share:

Fair Value of Financial Instruments, Policy [Policy Text Block]

Fair Values of Financial Instruments:

Share-Based Payment Arrangement [Policy Text Block]

Equity-based Compensation:

Concentration Risk, Credit Risk, Policy [Policy Text Block]

Concentration of Credit Risk:

New Accounting Pronouncements, Policy [Policy Text Block]

New Accounting Pronouncements:

Summary of Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2022

Accounting Policies [Abstract]

Disaggregation of Revenue [Table Text Block]

	Year Ended April 30, 2022
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,618		$	1,539		$	41,157
FEI-Zyfer		6,770			1,057			7,827
Intersegment		(1	)		(687	)		(688	)
Revenue	$	46,387		$	1,909		$	48,296

	Year Ended April 30, 2021
	(In thousands)
	POC			POT Revenue			Total Revenue
	Revenue
FEI-NY	$	39,225		$	3,175		$	42,400
FEI-Zyfer		10,993			2,842			13,835
Intersegment		(10	)		(1,971	)		(1,981	)
Revenue	$	50,208		$	4,046		$	54,254

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

	Years Ended April 30,
	(in thousands)
	2022		2021
Revenues by Product Line:
Satellite Revenue	$	26,092	$	26,980
Government Non-Space Revenue		19,593		24,775
Other Commercial & Industrial Revenue		2,611		2,499
Consolidated revenues	$	48,296	$	54,254

Earnings Per Share (Tables)

12 Months Ended

Apr. 30, 2022

Earnings Per Share [Abstract]

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

Reconciliations of the weighted average shares outstanding for basic and diluted (loss) income per share for the years ended April 30, 2022 and 2021, respectively, were as follows:

	For the Years Ended April 30,
	2022		2021
Weighted average shares outstanding:
Basic EPS Shares outstanding (weighted average)		9,265,934		9,177,537
Effect of Dilutive Securities		**		70,888
Diluted EPS Shares outstanding		9,265,934		9,248,425

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Tables)

12 Months Ended

Apr. 30, 2022

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Tables) [Line Items]

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

At April 30, 2022 and 2021, contract assets (liabilities), net, consisted of the following (in thousands):

	April 30, 2022			April 30, 2021
	(As Revised)			(As Restated)
Contract Assets	$	8,857		$	14,460
Contract Liabilities		(11,098	)		(12,512	)
Net (liability) asset	$	(2,241	)	$	1,948

	April 30, 2022									April 30, 2021
	As Filed			Adjustment			Revised			As Filed			Adjustment			Revised
Contract Assets	$	9,977		$	(1,120	)	$	8,857		$	12,640		$	1,820		$	14,460
Contract Liabilities		(12,218	)		1,120			(11,098	)		(10,692	)		(1,820	)		(12,512	)
Net (liability) asset	$	(2,241	)	$	-		$	(2,241	)	$	1,948		$	-		$	1,948

Schedule of Error Corrections and Prior Period Adjustments [Table Text Block]

	April 30, 2022								April 30, 2021
	As Filed		Adjustment			Revised			As Filed			Adjustment			Revised
Consolidated Balance Sheets:
Contract Assets	$	9,977	$	(1,120	)	$	8,857		$	12,640		$	1,820		$	14,460
Total Current Assets		57,130		(1,120	)		56,010			59,371			1,820			61,191
Total Assets		85,880		(1,120	)		84,760			96,708			1,820			98,528
Contract Liabilities		12,218		(1,120	)		11,098			10,692			1,820			12,512
Total Current Liabilities		22,981		(1,120	)		21,861			18,789			1,820			20,609
Total Liabilities		39,192		(1,120	)		38,072			41,299			1,820			43,119

Consolidated Statements of Cash Flows:
Changes in Operating Assets & Liabilities
Contract Assets	$	2,306	$	2,940		$	5,246		$	(2,180	)	$	(2,315	)	$	(4,495	)
Contract Liabilities		1,526		(2,940	)		(1,414	)		7,185			2,315			9,500
Net cash provided by operating activities		4,036		-			4,036			12,157			-			12,157

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

	For the Years Ended April 30,
	2022			2021
	(As Revised)			(As Revised)
Identifiable assets:
FEI-NY	$	40,888		$	47,372
FEI-Zyfer		10,522			12,897
less intersegment balances		(126	)		-
Corporate		33,476			38,259
Consolidated identifiable assets	$	84,760		$	98,528

Error Correction, Other [Member]

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Tables) [Line Items]

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

	April 30, 2022							April 30, 2021
	As Filed		Adjustment			Revised		As Filed		Adjustment		Revised
Identifiable assets:
FEI-NY	$	42,008	$	(1,120	)	$	40,888	$	45,552	$	1,820	$	47,372
Consolidated identifiable assets		85,880		(1,120	)		84,760		96,708		1,820		98,528

Inventories, Net (Tables)

12 Months Ended

Apr. 30, 2022

Inventory Disclosure [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories, net at April 30, 2022 and 2021, respectively, consisted of the following (in thousands):

	April 30, 2022		April 30, 2021
Raw Materials and Component Parts	$	11,683	$	12,386
Work in Progress		7,746		6,259
Finished Goods		477		1,016
	$	19,906	$	19,661

Property, Plant and Equipment, Net (Tables)

12 Months Ended

Apr. 30, 2022

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property, plant and equipment, net at April 30, 2022 and 2021, consisted of the following (in thousands):

	April 30, 2022			April 30, 2021

Buildings and building improvements	$	2,576		$	2,721
Machinery, equipment and furniture		59,948			59,136
		62,524			61,857
Less accumulated depreciation		(53,960	)		(52,245	)
	$	8,564		$	9,612

Right-of-Use Assets and Lease Liabilities (Tables)

12 Months Ended

Apr. 30, 2022

Disclosure Text Block [Abstract]

Lease, Cost [Table Text Block]

The table below presents ROU assets and lease liabilities recorded on the consolidated balance sheets as follows:

	Classification	April 30, 2022		April 30, 2021
		(In thousands)
Assets
Operating lease ROU assets	Right-of-Use assets leases	$	8,805	$	9,773

Liabilities
Operating lease liabilities (short-term)	Lease liability, current		1,744		1,715
Operating lease liabilities (long-term)	Lease liability, non-current		7,353		8,366
Total lease liabilities		$	9,097	$	10,081

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

Fiscal Year Ending April 30,
(in thousands)

2023	$	1,796
2024		1,993
2025		1,832
2026		1,317
2027		937
Thereafter		3,239
Total lease payments		11,114
Less imputed interest		(2,017	)
Present value of future lease payments		9,097
Less current obligations under leases		(1,744	)
Long-term lease obligations	$	7,353

Marketable Securities (Tables)

12 Months Ended

Apr. 30, 2022

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 April 30, 2022 and 2021, respectively, were as follows (in thousands):

	April 30, 2022
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,403	$	23	$	(462	)	$	9,964

	April 30, 2021
	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Fixed income securities	$	10,022	$	393	$	(102	)	$	10,313

Unrealized Gain (Loss) on Investments [Table Text Block]

	Less than 12 months					12 Months or more					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
April 30, 2022
Fixed Income Securities	$	2,349	$	(146	)	$	5,573	$	(316	)	$	7,922	$	(462	)

April 30, 2021
Fixed Income Securities	$	1,793	$	(52	)	$	614	$	(50	)	$	2,407	$	(102	)

Realized Gain (Loss) on Investments [Table Text Block]

	For the years ended April 30,
	2022		2021
Proceeds	$	2,089	$	2,498
Gross realized gains	$	6	$	28
Gross realized losses	$	-	$	-

Fair Value, by Balance Sheet Grouping [Table Text Block]

Maturities of fixed income securities classified as available-for-sale at April 30, 2022 were as follows (at cost, in thousands):

Current	$	3,025
Due after one year through five years		5,694
Due after five years		1,684
	$	10,403

Accrued Liabilities (Tables)

12 Months Ended

Apr. 30, 2022

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued liabilities at April 30, 2022 and 2021, respectively, consisted of the following (in thousands):

	2022		2021
Vacation and other compensation	$	1,523	$	1,564
Incentive compensation		100		550
Payroll taxes		112		167
Warranty reserve		519		439
Commissions		263		329
Deferred compensation payable		469		704
Other		710		1,492
	$	3,696	$	5,245

Employee Benefit Plans (Tables)

12 Months Ended

Apr. 30, 2022

Disclosure Text Block Supplement [Abstract]

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

The following table summarizes information about stock option and SARs activity for the years ended April 30, 2022 and 2021:

	Stock Options and Stock Appreciation Rights
						Weighted Average
				Weighted-Average		Remaining	Aggregate
	Shares			Exercise Price		Contractual Term	Intrinsic Value
Outstanding – April 30, 2020		1,059,500		$	9.74	2.2 years	$	5,416,783
Granted		-			-
Exercised		(247,500	)		8.42			573,418
Expired or Canceled		(197,000	)		10.96
Outstanding – April 30, 2021		615,000		$	9.88	1.8 years	$	2,141,905
Granted		-			-
Exercised		(42,875	)		7.30			34,660
Expired or Canceled		(143,000	)		10.48
Outstanding – April 30, 2022		429,125		$	9.94	1.3 years	$	3,278,704
Exercisable		393,500		$	10.06	1.4 years	$	2,989,785
Available for future grants		906,653

Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

The following table summarizes activity for the RSUs and PSUs awards that reduce available capacity under the 2005 Stock Award Plan for the years ended April 30, 2022 and 2021:

				Weighted-Average
	Shares			Exercise Price
Balance – April 30, 2020		13,000			11.38
Granted		47,250			10.03
Vested		(3,250	)		11.38
Balance – April 30, 2021		57,000			10.26
Granted		26,250			9.84
Vested		(15,066	)		10.32
Forfeited		(2,575	)		9.97
Balance – April 30, 2022		65,609			10.09

Income Taxes (Tables)

12 Months Ended

Apr. 30, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The (benefit) provision for income taxes consisted of the following (in thousands):

	Year Ended April 30,
	2022		2021
Current:
Federal	$	-	$	(119	)
State		1		(85	)
Current (benefit) provision		1		(204	)
Deferred:
Federal		-		-
State		-		-
Deferred tax (benefit) provision		-		-

Total (benefit) provision	$	1	$	(204	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended April 30,
	2022			2021
Statutory rate	$	(1,819	)	$	100
State and local tax		(163	)		69
Valuation allowance on deferred tax assets		1,050			961
Nondeductible expenses		(11	)		2
Uncertain tax positions		1			(898	)
Nontaxable life insurance cash value increase		(47	)		(63	)
Taxable life insurance gain		783			128
Stock Compensation		86			242
Tax credits		(219	)		(434	)
Change in tax rate		209			(323	)
Other items		131			12
Total (benefit) provision	$	1		$	(204	)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The components of deferred taxes are as follows (in thousands):

	Year Ended April 30,
	2022			2021
Deferred tax assets:
Employee benefits	$	3,047		$	4,789
Inventory		2,958			1,946
Accounts receivable		118			119
Tax credits		2,306			2,027
Other assets		981			883
Lease Liability		2,284			2,593
Capital Loss carry-forward		2,513			2,602
Net operating loss carryforwards		7,574			6,203
Total deferred tax asset		21,781			21,162
Deferred tax liabilities:
Property, plant and equipment		(461	)		(666	)
Right of use asset		(2,211	)		(2,514	)
Other liabilities		(83	)		(195	)
Deferred state income tax		(943	)		(932	)
Net deferred tax asset		18,083			16,855
Valuation allowance		(18,091	)		(16,863	)
Net deferred tax (liability) asset	$	(8	)	$	(8	)

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending amounts of unrecognized tax benefits, is as follows (in thousands):

	2022		2021
Balance at the beginning of the fiscal year	$	119	$	1,354
Additions based on positions taken in the current year		111		-
Additions based on positions taken in prior years		-		-
Decreases based on positions taken in prior years		-		-
Lapse in statute of limitations		-		(1,235	)
Balance at the end of the fiscal year	$	230	$	119

Segment Information (Tables)

12 Months Ended

Apr. 30, 2022

Segment Reporting [Abstract]

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

	For the Years Ended April 30,
	2022			2021
Revenues:
FEI-NY	$	41,157		$	42,400
FEI-Zyfer		7,827			13,835
less intersegment revenues		(688	)		(1,981	)
Consolidated revenues	$	48,296		$	54,254

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

Operating (loss) income:
FEI-NY	$	(5,679	)	$	(1,067	)
FEI-Zyfer		(2,104	)		655
less intersegment revenues		79			(204	)
Corporate		(334	)		(342	)
Consolidated operating loss	$	(8,038	)	$	(958	)

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

	For the Years Ended April 30,
	2022			2021
	(As Revised)			(As Revised)
Identifiable assets:
FEI-NY	$	40,888		$	47,372
FEI-Zyfer		10,522			12,897
less intersegment balances		(126	)		-
Corporate		33,476			38,259
Consolidated identifiable assets	$	84,760		$	98,528

Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block]

Depreciation and amortization (allocated):
FEI-NY	$	2,798	$	3,110
FEI-Zyfer		227		191
Corporate		-		-
Consolidated depreciation and amortization expense	$	3,025	$	3,301

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

	2022		2021
Belgium	$	-	$	36
Brazil		368		106
France		-		123
China		-		215
Russia		23		94
Germany		17		31
Italy		35		27
Israel		7		82
Singapore		-		32
Taiwan		-		101
United Kingdom		198		261
Other		233		315
	$	881	$	1,423

Product Warranties (Tables)

12 Months Ended

Apr. 30, 2022

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

As of April 30, 2022 and 2021, respectively, changes in the carrying amount of accrued product warranty costs, reported in accrued expenses on the consolidated balance sheets, were as follows (in thousands):

	2022			2021
Balance at beginning of year	$	439		$	527
Warranty costs incurred		(587	)		(619	)
Product warranty accrual		667			531
Balance at end of year	$	519		$	439

Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Apr. 30, 2022

Disclosure Text Block Supplement [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Change in
	Market Value
	of Marketable
	Securities
Balance April 30, 2020, net of taxes				$	490
Items of other comprehensive income (loss) before reclassification, pretax					(171	)
Tax effect					(6	)
Items of other comprehensive income (loss) before reclassification, net of taxes					(177	)
Reclassification adjustments, pretax **		(28	)
Tax effect		6			(22	)
Total other comprehensive income (loss), net of taxes					(199	)
Balance April 30, 2021, net of taxes					291
Items of other comprehensive income (loss) before reclassification, pretax					(725	)
Tax effect					(1	)
Items of other comprehensive income (loss) before reclassification, net of taxes					(726	)
Reclassification adjustments, pretax **		(6	)
Tax effect		1			(5	)
Total other comprehensive income (loss), net of taxes					(731	)
Balance April 30, 2022, net of taxes					(440	)

**The reclassification adjustments represent net realized gains on the sale or redemption of available-for-sale marketable securities that were reclassified from AOCI to Other income (expense), net.

Summary of Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Summary of Accounting Policies (Details) [Line Items]
Revenues	$ 48,296	$ 54,254
POC Revenue [Member]
Summary of Accounting Policies (Details) [Line Items]
Revenues	$ 46,400	$ 50,200
Building [Member]
Summary of Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Other Depreciable Assets [Member] \| Minimum [Member]
Summary of Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Other Depreciable Assets [Member] \| Maximum [Member]
Summary of Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	10 years

- Definition

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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+ Details

Summary of Accounting Policies (Details) - Disaggregation of Revenue - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 48,296	$ 54,254
Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	41,157	42,400
Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	7,827	13,835
Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	(688)	(1,981)
POC Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	46,387	50,208
POC Revenue [Member] \| Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	39,618	39,225
POC Revenue [Member] \| Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	6,770	10,993
POC Revenue [Member] \| Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	(1)	(10)
POT Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,909	4,046
POT Revenue [Member] \| Frequency Electronics Inc New York [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,539	3,175
POT Revenue [Member] \| Frequency Electronics Inc Zyfer [Member]
Disaggregation of Revenue [Line Items]
Revenue	1,057	2,842
POT Revenue [Member] \| Inter Segment [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ (687)	$ (1,971)

- Definition

+ References

+ Details

Summary of Accounting Policies (Details) - Revenue from External Customers by Products and Services - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Revenue from External Customer [Line Items]
Revenue	$ 48,296	$ 54,254
Satellite Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	26,092	26,980
Government Non-Space Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	19,593	24,775
Other Commercial & Industrial Revenue [Member]
Revenue from External Customer [Line Items]
Revenue	$ 2,611	$ 2,499

- Definition

+ References

+ Details

Earnings Per Share (Details) - shares	12 Months Ended
Earnings Per Share (Details) - shares	Apr. 30, 2022	Apr. 30, 2021
Earnings Per Share [Abstract]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	193,000	345,800

Earnings Per Share (Details) - Schedule of Earnings Per Share, Basic and Diluted - shares	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Weighted average shares outstanding:
Basic EPS Shares outstanding (weighted average)	9,265,934	9,177,537
Effect of Dilutive Securities		70,888
Diluted EPS Shares outstanding	9,265,934	9,248,425

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) [Line Items]
Revenues	$ 48,296	$ 54,254
	(2,241)	1,948
Contract with Customer, Asset, before Allowance for Credit Loss	8,857	14,460
Contract with Customer, Liability	11,098	12,512
Previously Reported [Member]
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) [Line Items]
	(2,241)	1,948
Contract with Customer, Asset, before Allowance for Credit Loss	9,977	12,640
Contract with Customer, Liability	12,218	10,692
Contracts Accounted for under Percentage of Completion [Member]
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) [Line Items]
Revenues	46,400	50,200
Anticipated Loss on Contracts	$ 4,200	$ 1,000

- Definition

+ References

+ Details

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Costs and Estimated Earnings in Excess of Billings, Net - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Costs and Estimated Earnings in Excess of Billings, Net [Line Items]
Contract Assets	$ 8,857	$ 14,460
Contract Liabilities	(11,098)	(12,512)
Net (liability) asset	(2,241)	1,948
Previously Reported [Member]
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Costs and Estimated Earnings in Excess of Billings, Net [Line Items]
Contract Assets	9,977	12,640
Contract Liabilities	(12,218)	(10,692)
Net (liability) asset	(2,241)	1,948
Scenario, Adjustment [Member]
Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Costs and Estimated Earnings in Excess of Billings, Net [Line Items]
Contract Assets	(1,120)	1,820
Contract Liabilities	1,120	(1,820)
Net (liability) asset	$ 0	$ 0

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Schedule of Error Corrections and Prior Period Adjustments - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Contract Assets	$ 8,857	$ 14,460
Total Current Assets	56,010	61,191
Total Assets	84,760	98,528
Contract Liabilities	11,098	12,512
Total Current Liabilities	21,861	20,609
Total Liabilities	38,072	43,119
Consolidated Statements of Cash Flows:
Contract Assets	5,246	(4,495)
Contract Liabilities	(1,414)	9,500
Net cash provided by operating activities	4,036	12,157
Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Contract Assets	9,977	12,640
Total Current Assets	57,130	59,371
Total Assets	85,880	96,708
Contract Liabilities	12,218	10,692
Total Current Liabilities	22,981	18,789
Total Liabilities	39,192	41,299
Consolidated Statements of Cash Flows:
Contract Assets	2,306	(2,180)
Contract Liabilities	1,526	7,185
Net cash provided by operating activities	4,036	12,157
Scenario, Adjustment [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Contract Assets	(1,120)	1,820
Total Current Assets	(1,120)	1,820
Total Assets	(1,120)	1,820
Contract Liabilities	(1,120)	1,820
Total Current Liabilities	(1,120)	1,820
Total Liabilities	(1,120)	1,820
Consolidated Statements of Cash Flows:
Contract Assets	2,940	(2,315)
Contract Liabilities	(2,940)	2,315
Net cash provided by operating activities	$ 0	$ 0

Contract (Liabilities) Assets, Net (As Restated and As Revised) (Details) - Reconciliation of Assets from Segment to Consolidated - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ 84,760	$ 98,528
Frequency Electronics Inc New York [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	40,888	47,372
Previously Reported [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	85,880	96,708
Previously Reported [Member] \| Frequency Electronics Inc New York [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	42,008	45,552
Scenario, Adjustment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	(1,120)	1,820
Scenario, Adjustment [Member] \| Frequency Electronics Inc New York [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Identifiable assets	$ (1,120)	$ 1,820

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

+ Details

Inventories, Net (Details) - USD ($) $ in Millions	Apr. 30, 2022	Apr. 30, 2021
Inventory Disclosure [Abstract]
Inventory Valuation Reserves	$ 7.5	$ 7.3

Inventories, Net (Details) - Schedule of Inventory, Current - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Inventory Current Abstract
Raw Materials and Component Parts	$ 11,683	$ 12,386
Work in Progress	7,746	6,259
Finished Goods	477	1,016
	$ 19,906	$ 19,661

Property, Plant and Equipment, Net (Details) - USD ($)	12 Months Ended
Property, Plant and Equipment, Net (Details) - USD ($)	Apr. 30, 2022	Apr. 30, 2021
Property, Plant and Equipment [Abstract]
Depreciation	$ 2,800,000	$ 2,900,000
Cost of Property Repairs and Maintenance	$ 677,000	$ 827,000

Property, Plant and Equipment, Net (Details) - Schedule of Property, Plant and Equipment - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Property Plant And Equipment Abstract
Buildings and building improvements	$ 2,576	$ 2,721
Machinery, equipment and furniture	59,948	59,136
	62,524	61,857
Less accumulated depreciation	(53,960)	(52,245)
	$ 8,564	$ 9,612

Right-of-Use Assets and Lease Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Disclosure Text Block [Abstract]
Operating Lease, Expense	$ 1.6	$ 1.6
Operating Lease, Payments	$ 2.0
Operating Lease, Weighted Average Remaining Lease Term	6 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	6.16%

Right-of-Use Assets and Lease Liabilities (Details) - Lease, Cost - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Assets
Operating lease ROU assets	$ 8,805	$ 9,773
Liabilities
Operating lease liabilities (short-term)	1,744	1,715
Operating lease liabilities (long-term)	7,353	8,366
Total lease liabilities	$ 9,097	$ 10,081

Right-of-Use Assets and Lease Liabilities (Details) - Lessee, Operating Lease, Liability, Maturity - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Lessee Operating Lease Liability Maturity Abstract
2022	$ 1,796
2023	1,993
2024	1,832
2025	1,317
2027	937
Thereafter	3,239
Total lease payments	11,114
Less imputed interest	(2,017)
Present value of future lease payments	9,097	$ 10,081
Less current obligations under leases	(1,744)	(1,715)
Long-term lease obligations	$ 7,353	$ 8,366

Marketable Securities (Details) - Schedule of Available-for-Sale Securities Reconciliation - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Available For Sale Securities Reconciliation Abstract
Cost	$ 10,403	$ 10,022
Gross Unrealized Gains	23	393
Gross Unrealized Losses	(462)	(102)
Fair Market Value	$ 9,964	$ 10,313

Marketable Securities (Details) - Schedule of Unrealized Gain (Loss) on Investments - Fixed Income Securities [Member] - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Marketable Securities (Details) - Schedule of Unrealized Gain (Loss) on Investments [Line Items]
Fair Value, Less than 12 months	$ 2,349	$ 1,793
Unrealized Losses, Less than 12 months	(146)	(52)
Fair Value, Morethan 12 months	5,573	614
Unrealized Losses, More than 12 months	(316)	(50)
Fair Value	7,922	2,407
Unrealized Losses	$ (462)	$ (102)

Marketable Securities (Details) - Schedule of Realized Gain (Loss) on Investments - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Realized Gain Loss On Investments Abstract
Proceeds	$ 2,089	$ 2,498
Gross realized gains	6	28
Gross realized losses	$ 0	$ 0

Marketable Securities (Details) - Schedule of Fair Value, by Balance Sheet Grouping - Fixed Income Securities [Member] $ in Thousands	Apr. 30, 2022 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Current	$ 3,025
Due after one year through five years	5,694
Due after five years	1,684
	$ 10,403

Accrued Liabilities (Details) - Schedule of Accrued Liabilities - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Accrued Liabilities Abstract
Vacation and other compensation	$ 1,523	$ 1,564
Incentive compensation	100	550
Payroll taxes	112	167
Warranty reserve	519	439
Commissions	263	329
Deferred compensation payable	469	704
Other	710	1,492
	$ 3,696	$ 5,245

Investment in Morion, Inc. (Details) - USD ($)	12 Months Ended
Investment in Morion, Inc. (Details) - USD ($)	Apr. 30, 2022	Apr. 30, 2021
Investment in Morion, Inc. (Details) [Line Items]
Other than Temporary Impairment Losses, Investments	$ 796,000	$ 0
Morion Inc [Member]
Investment in Morion, Inc. (Details) [Line Items]
Cost Method Investment Ownership Percentage	4.60%
Related Party Transaction, Purchases from Related Party	$ 215,000	710,000
Revenue from Related Parties	23,000	94,000
Proceeds from Dividends Received	$ 123,000	$ 105,000

- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI https://asc.fasb.org/extlink&oid=120401555&loc=SL114874292-224272

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(B))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(C))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

+ Details

Employee Benefit Plans (Details) - USD ($)	12 Months Ended
Employee Benefit Plans (Details) - USD ($)	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 1990
Employee Benefit Plans (Details) [Line Items]
Stock Issued During Period, Value, Employee Benefit Plan (in Dollars)	$ 426,000	$ 419,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number	429,125	615,000	1,059,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	393,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 10.06
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period	42,875	247,500
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	906,653
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount (in Dollars)	$ 7,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares	41,875	85,625
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested in Period, Fair Value (in Dollars)	$ 123,000	$ 274,000
Employee Benefits and Share-Based Compensation (in Dollars)	842,000	1,495,000
Share-Based Payment Arrangement, Noncash Expense (in Dollars)	$ 247,000	$ 273,000
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture	1,150	950
United States Post-Retirement Benefit Plan of US Entity, Defined Benefit [Member]
Employee Benefit Plans (Details) [Line Items]
Stock Issued During Period, Shares, Employee Benefit Plan	44,224	41,118
Stock Issued During Period, Value, Employee Benefit Plan (in Dollars)	$ 426,000	$ 419,000
APIC, Share-Based Payment Arrangement, ESPP, Increase for Cost Recognition (in Dollars)	$ 382,000	$ 325,000
Common Stock, Capital Shares Reserved for Future Issuance	499,738	498,115
Income Incentive Pool [Member]
Employee Benefit Plans (Details) [Line Items]
Accrued Bonuses (in Dollars)	$ 100,000	$ 550,000
Restricted Stock Plan [Member]
Employee Benefit Plans (Details) [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	0			375,000
Deferred Compensation Agreement [Member]
Employee Benefit Plans (Details) [Line Items]
Deferred Compensation Arrangement with Individual, Description	Under these agreements, each key employee receives specified retirement payments for the remainder of the employee’s life with a minimum payment of ten years’ benefits to either the employee or his or her beneficiaries. The agreements also provide for lump sum payments upon termination of employment without cause and reduced benefits upon early retirement.
Deferred Compensation Arrangement with Individual, Compensation Expense (in Dollars)	$ 1,100,000
Share-Based Payment Arrangement, Option [Member]
Employee Benefit Plans (Details) [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period	10 years
Employee Benefits and Share-Based Compensation (in Dollars)	$ 92,000	103,000
Share-Based Payment Arrangement, Noncash Expense (in Dollars)	$ 144,000	$ 160,000
Stock Appreciation Rights (SARs) [Member]
Employee Benefit Plans (Details) [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period	5 years
Stock Appreciation Rights (SARs) [Member] \| Employees and Directors [Member]
Employee Benefit Plans (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Total Grants from Inception, Gross	2,385,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number	429,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number	394,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 10.06
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross	2,022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period	42,875
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture	11,470
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	31,405

Employee Benefit Plans (Details) - Schedule of Share-based Compensation, Stock Options, Activity - USD ($)	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Schedule Of Share Based Compensation Stock Options Activity Abstract
Options, Shares Outstanding	429,125	615,000	1,059,500
Options, Weighted-Average Exercise Price (in Dollars per share)	$ 9.94	$ 9.88	$ 9.74
Options, Weighted Average Remaining Contractual Term	1 year 3 months 18 days	1 year 9 months 18 days	2 years 2 months 12 days
Options, Aggregate Intrinsic Value (in Dollars)	$ 3,278,704	$ 2,141,905	$ 5,416,783
Options, Shares Exercisable	393,500
Options, Weighted-Average Exercise Price Exercisable (in Dollars per share)	$ 10.06
Options, Weighted Average Remaining Contractual Term Exercisable	1 year 4 months 24 days
Options, Aggregate Intrinsic Value Exercisable (in Dollars)	$ 2,989,785
Available for future grants	906,653
Options, Shares Granted	0	0
Options, Weighted-Average Exercise Price Granted (in Dollars per share)	$ 0	$ 0
Options, Shares Exercised	(42,875)	(247,500)
Options, Weighted-Average Exercise Price Exercised (in Dollars per share)	$ 7.3	$ 8.42
Options, Aggregate Intrinsic Value Exercised (in Dollars)	$ 34,660	$ 573,418
Options, Shares Expired or Canceled	(143,000)	(197,000)
Options, Weighted-Average Exercise Price Expired or Canceled (in Dollars per share)	$ 10.48	$ 10.96

Employee Benefit Plans (Details) - Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity - RSUs and PSUs [Member] - $ / shares	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2020
Employee Benefit Plans (Details) - Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Line Items]
Balance, Shares	65,609	57,000	13,000
Balance, Weighted-Average Exercise Price	$ 10.09	$ 10.26	$ 11.38
Shares Granted	26,250	47,250
Granted, Weighted-Average Exercise Price	$ 9.84	$ 10.03
Shares Vested	(15,066)	(3,250)
Vested, Weighted-Average Exercise Price	$ 10.32	$ 11.38
Shares Forfeited	(2,575)
Forfeited, Weighted-Average Exercise Price	$ 9.97

Income Taxes (Details) - USD ($)	12 Months Ended
Income Taxes (Details) - USD ($)	Apr. 30, 2022	Apr. 30, 2021
Income Taxes (Details) [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 1,200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1,176	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	1,176	$ (119,000)
Research Tax Credit Carryforward [Member]
Income Taxes (Details) [Line Items]
Tax Credit Carryforward, Amount	1,000,000
Domestic Tax Authority [Member]
Income Taxes (Details) [Line Items]
Operating Loss Carryforwards	29,600,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	15,900,000
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration	13,700,000
Tax Credit Carryforward, Amount	9,900,000
Domestic Tax Authority [Member] \| Annual Limitation [Member]
Income Taxes (Details) [Line Items]
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	$ 3,400,000

Income Taxes (Details) - Schedule of Components of Income Tax Expense (Benefit) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Current:
Federal	$ 0	$ (119)
State	1	(85)
Current (benefit) provision	1	(204)
Deferred:
Federal	0	0
State	0	0
Deferred tax (benefit) provision	0	0
Total (benefit) provision	$ 1	$ (204)

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Income Taxes (Details) - Schedule of Effective Income Tax Rate Reconciliation - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Effective Income Tax Rate Reconciliation Abstract
Statutory rate	$ (1,819)	$ 100
State and local tax	(163)	69
Valuation allowance on deferred tax assets	1,050	961
Nondeductible expenses	(11)	2
Uncertain tax positions	1	(898)
Nontaxable life insurance cash value increase	(47)	(63)
Taxable life insurance gain	783	128
Stock Compensation	86	242
Tax credits	(219)	(434)
Change in tax rate	209	(323)
Other items	131	12
Total (benefit) provision	$ 1	$ (204)

Income Taxes (Details) - Schedule of Deferred Tax Assets and Liabilities - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Deferred tax assets:
Employee benefits	$ 3,047	$ 4,789
Inventory	2,958	1,946
Accounts receivable	118	119
Tax credits	2,306	2,027
Other assets	981	883
Lease Liability	2,284	2,593
Capital Loss carry-forward	2,513	2,602
Net operating loss carryforwards	7,574	6,203
Total deferred tax asset	21,781	21,162
Deferred tax liabilities:
Property, plant and equipment	(461)	(666)
Right of use asset	(2,211)	(2,514)
Other liabilities	(83)	(195)
Deferred state income tax	(943)	(932)
Net deferred tax asset	18,083	16,855
Valuation allowance	(18,091)	(16,863)
Net deferred tax (liability) asset	$ (8)	$ (8)

Income Taxes (Details) - Schedule of Unrecognized Tax Benefits Roll Forward - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Unrecognized Tax Benefits Roll Forward Abstract
Balance at the beginning of the fiscal year	$ 119	$ 1,354
Additions based on positions taken in the current year	111	0
Additions based on positions taken in prior years	0	0
Decreases based on positions taken in prior years	0	0
Lapse in statute of limitations	0	(1,235)
Balance at the end of the fiscal year	$ 230	$ 119

Segment Information (Details)	12 Months Ended
Segment Information (Details)	Apr. 30, 2022	Apr. 30, 2021
Segment Information (Details) [Line Items]
Number of Reportable Segments	2
Number of Operating Segments	2
Frequency Electronics Inc New York [Member]
Segment Information (Details) [Line Items]
Number Of Principal Markets	3
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| U.S. Government and U.S. Government Subcontractors [Member]
Segment Information (Details) [Line Items]
Concentration Risk, Percentage	94.00%	91.00%

Segment Information (Details) - Reconciliation of Revenue from Segments to Consolidated - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Revenues:
Revenues	$ 48,296	$ 54,254
Frequency Electronics Inc New York [Member]
Revenues:
Revenues	41,157	42,400
Frequency Electronics Inc Zyfer [Member]
Revenues:
Revenues	7,827	13,835
Inter Segment [Member]
Revenues:
Revenues	$ (688)	$ (1,981)

- Definition

+ References

+ Details

Segment Information (Details) - Reconciliation of Operating Profit (Loss) from Segments to Consolidated - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Operating (loss) income:
Operating profit (loss)	$ (8,038)	$ (958)
Frequency Electronics Inc New York [Member]
Operating (loss) income:
Operating profit (loss)	(5,679)	(1,067)
Frequency Electronics Inc Zyfer [Member]
Operating (loss) income:
Operating profit (loss)	(2,104)	655
Inter Segment [Member]
Operating (loss) income:
Operating profit (loss)	79	(204)
Corporate Segment [Member]
Operating (loss) income:
Operating profit (loss)	$ (334)	$ (342)

Segment Information (Details) - Schedule of Reconciliation of Assets from Segment to Consolidated - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Identifiable assets:
Identifiable Assets	$ 84,760	$ 98,528
Frequency Electronics Inc New York [Member]
Identifiable assets:
Identifiable Assets	40,888	47,372
Frequency Electronics Inc Zyfer [Member]
Identifiable assets:
Identifiable Assets	10,522	12,897
Inter Segment [Member]
Identifiable assets:
Identifiable Assets	(126)	0
Corporate Segment [Member]
Identifiable assets:
Identifiable Assets	$ 33,476	$ 38,259

- Definition

+ References

+ Details

Segment Information (Details) - Schedule of Reconciliation of Depreciation and Amortization from Segment to Consolidated - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Depreciation and amortization (allocated):
Depreciation and Amortization	$ 3,025	$ 3,301
Frequency Electronics Inc New York [Member]
Depreciation and amortization (allocated):
Depreciation and Amortization	2,798	3,110
Frequency Electronics Inc Zyfer [Member]
Depreciation and amortization (allocated):
Depreciation and Amortization	227	191
Corporate Segment [Member]
Depreciation and amortization (allocated):
Depreciation and Amortization	$ 0	$ 0

Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
BELGIUM
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	$ 0	$ 36
BRAZIL
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	368	106
FRANCE
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	0	123
CHINA
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	0	215
RUSSIAN FEDERATION
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	23	94
GERMANY
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	17	31
ITALY
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	35	27
KOREA, REPUBLIC OF
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	7	82
SINGAPORE
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	0	32
TAIWAN
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	0	101
UNITED KINGDOM
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	198	261
Other Countries [Member]
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	233	315
Foreign Revenue [Member]
Segment Information (Details) - Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Line Items]
Revenues	$ 881	$ 1,423

Product Warranties (Details)	12 Months Ended
Product Warranties (Details)	Apr. 30, 2022
Product Warranties Disclosures [Abstract]
Standard Product Warranty Description	The Company generally provides its customers with a one-year warranty regarding the manufactured quality and functionality of its products. For some limited products, the warranty period has been extended.

Product Warranties (Details) - Schedule of Product Warranty Liability - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Schedule Of Product Warranty Liability Abstract
Balance at beginning of year	$ 439	$ 527
Warranty costs incurred	(587)	(619)
Product warranty accrual	667	531
Balance at end of year	$ 519	$ 439

Other Comprehensive Income (Loss) (Details) - Schedule of Accumulated Other Comprehensive Income (Loss) - USD ($)
$ in Thousands

12 Months Ended

Apr. 30, 2022

Apr. 30, 2021

Apr. 30, 2020

Schedule Of Accumulated Other Comprehensive Income Loss Abstract

Balance, Change in Market Value of Marketable Securities

$ (440)

$ 291

$ 490

Items of other comprehensive income (loss) before reclassification, pretax

(725)

(171)

Tax effect

(1)

(6)

Items of other comprehensive income (loss) before reclassification, net of taxes

(726)

(177)

Reclassification adjustments, pretax **

^[1]

(6)

(28)

Tax effect

(5)

(22)

Total other comprehensive income (loss), net of taxes

$ (731)

$ (199)

[1]	The reclassification adjustments represent net realized gains on the sale or redemption of available-for-sale marketable securities that were reclassified from AOCI to Other income (expense), net.

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
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+ Details

Contingencies (Details) $ in Millions	Sep. 21, 2021 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Loss Contingency, Damages Sought, Value	$ 6