10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended February 28, 2021

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________ to __________

Commission file number: 000-22893

AEHR TEST SYSTEMS

(Exact name of Registrant as specified in its charter)

California	94-2424084
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

400 Kato Terrace Fremont, CA	94539
(Address of principal executive offices)	(Zip Code)

(510) 623-9400

(Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).  Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☐	Accelerated filer ☐
Non-accelerated filer ☒	Smaller reporting company ☒
	Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Securities registered pursuant to Section 12(b) of the Act:

	Trading
Title of each class	Symbol(s)	Name of each exchange on which registered
Common Stock par value $0.01 per share	AEHR	The NASDAQ Capital Market

     Number of shares of the registrant’s common stock, $0.01 par value, outstanding as of March 31, 2021 was 23,597,730.

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AEHR TEST SYSTEMS

FORM 10-Q

FOR THE QUARTER ENDED FEBRUARY 28, 2021

INDEX

PART I.	FINANCIAL INFORMATION
ITEM 1.	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets at February 28, 2021 and May 31, 2020	4
	Condensed Consolidated Statements of Operations for the Three and Nine Months Ended February 28, 2021 and February 29, 2020	5
	Condensed Consolidated Statements of Comprehensive (Loss) Income for the Three and Nine Months Ended February 28, 2021 and February 29, 2020	6
	Condensed Consolidated Statements of Shareholders’ Equity for the Three and Nine Months Ended February 28, 2021 and February 29, 2020	7
	Condensed Consolidated Statements of Cash Flows for the Nine Months Ended February 28, 2021 and February 29, 2020	8
	Notes to Condensed Consolidated Financial Statements	9
ITEM 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	23
ITEM 3.	Quantitative and Qualitative Disclosures About Market Risks	30
ITEM 4.	Controls and Procedures	30
PART II.	OTHER INFORMATION
ITEM 1.	Legal Proceedings	31
ITEM 1A.	Risk Factors	31
ITEM 2.	Unregistered Sales of Equity Securities and Use of Proceeds	31
ITEM 3.	Defaults Upon Senior Securities	31
ITEM 4.	Mine Safety Disclosures	31
ITEM 5.	Other Information	31
ITEM 6.	Exhibits	32
	SIGNATURES	33

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PART I. FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS (Unaudited)

AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

(unaudited)

	February 28,	May 31,
	2021	2020
		(1)
ASSETS
Current assets:
Cash and cash equivalents	$4,738	$5,433
Accounts receivable, net	2,721	3,717
Inventories	8,339	7,989
Prepaid expenses and other current assets	571	512
Total current assets	16,369	17,651
Property and equipment, net	617	663
Operating lease right-of-use assets	1,763	2,107
Other assets	142	153
Total assets	$18,891	$20,574
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
Line of credit	$1,400	$--
Accounts payable	1,086	945
Accrued expenses	1,624	1,439
Operating lease liabilities, short-term	722	658
Customer deposits and deferred revenue, short-term	587	170
Current portion of long-term debt	1,492	653
Total current liabilities	6,911	3,865
Operating lease liabilities, long-term	1,185	1,605
Long-term debt, net of current portion	187	1,026
Deferred revenue, long-term	80	22
Other long-term liabilities	43	--
Total liabilities	8,406	6,518
Aehr Test Systems shareholders' equity:
Common stock, $0.01 par value: Authorized: 75,000 shares; Issued and outstanding: 23,598 shares and 23,107 shares at February 28, 2021 and May 31, 2020, respectively	236	231
Additional paid-in capital	87,174	85,898
Accumulated other comprehensive (loss) income	(45)	2,234
Accumulated deficit	(76,880)	(74,286)
Total Aehr Test Systems shareholders' equity	10,485	14,077
Noncontrolling interest	--	(21)
Total shareholders' equity	10,485	14,056
Total liabilities and shareholders' equity	$18,891	$20,574

(1)

The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

The accompanying notes are an integral part of these condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Net sales	$5,267	$6,111	$8,962	$18,518
Cost of sales	3,373	3,120	6,464	10,054
Gross profit	1,894	2,991	2,498	8,464
Operating expenses:
Selling, general and administrative	1,643	1,891	4,658	5,856
Research and development	903	845	2,623	2,532
Total operating expenses	2,546	2,736	7,281	8,388
(Loss) income from operations	(652)	255	(4,783)	76
Interest (expense) income, net	(10)	13	(35)	27
Net gain from dissolution of Aehr Test Systems Japan	--	--	2,186	--
Other (expense) income, net	(39)	(9)	(139)	6
(Loss) income before income tax (expense) benefit	(701)	259	(2,771)	109
Income tax (expense) benefit	(34)	(14)	177	(26)
Net (loss) income	(735)	245	(2,594)	83
Less: Net income attributable to the noncontrolling interest	--	--	--	--
Net (loss) income attributable to Aehr Test Systems common shareholders	$(735)	$245	$(2,594)	$83
Net (loss) income per share
Basic	$(0.03)	$0.01	$(0.11)	$0.00
Diluted	$(0.03)	$0.01	$(0.11)	$0.00
Shares used in per share calculations:
Basic	23,525	22,937	23,390	22,823
Diluted	23,525	23,130	23,390	22,940

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME

(in thousands, unaudited)

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Net (loss) income	$(735)	$245	$(2,594)	$83
Other comprehensive income (loss), net of tax: Net change in cumulative translation adjustments	39	5	143	(15)
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan	--	--	(2,401)	--
Total comprehensive (loss) income	(696)	250	(4,852)	68
Less: Comprehensive income (loss) attributable to noncontrolling interest	--	--	21	(1)
Comprehensive (loss) income, attributable to Aehr Test Systems	$(696)	$250	$(4,873)	$69

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(in thousands)

(unaudited)

				Accumulated		Total Aehr Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Three Months Ended February 28, 2021	Shares	Amount	Capital	(Loss) Income	Deficit	Equity	Interest	Equity
Balances, November 30, 2020	23,487	$235	$86,786	$(62)	$(76,167)	$10,792	$--	$10,792
Issuance of common stock under employee plans	111	1	117	--	--	118	--	118
Stock-based compensation	--	--	271	--	--	271	--	271
Net loss	--	--	--	--	(735)	(735)	--	(735)
Foreign currency translation adjustment	--	--	--	17	22	39	--	39
Balances, February 28, 2021	23,598	$236	$87,174	$(45)	$(76,880)	$10,485	$--	$10,485

				Accumulated		Total Aehr Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Nine Months Ended February 28, 2021	Shares	Amount	Capital	Income (Loss)	Deficit	Equity	Interest	Equity
Balances, May 31, 2020	23,107	$231	$85,898	$2,234	$(74,286)	$14,077	$(21)	$14,056
Issuance of common stock under employee plans	491	5	478	--	--	483	--	483
Stock-based compensation	--	--	798	--	--	798	--	798
Net loss	--	--	--	--	(2,594)	(2,594)	--	(2,594)
Foreign currency translation adjustment	--	--	--	144	--	144	(1)	143
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan	--	--	--	(2,423)	--	(2,423)	22	(2,401)
Balances, February 28, 2021	23,598	$236	$87,174	$(45)	$(76,880)	$10,485	$--	$10,485

				Accumulated		Total Aehr Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Three Months Ended February 29, 2020	Shares	Amount	Capital	Income	Deficit	Equity	Interest	Equity
Balances, November 30, 2019	22,914	$229	$85,194	$2,211	$(71,646)	$15,988	$(20)	$15,968
Issuance of common stock under employee plans	101	1	129	--	--	130	--	130
Stock-based compensation	--	--	207	--	--	207	--	207
Net income	--	--	--	--	245	245	--	245
Foreign currency translation adjustment	--	--	--	5	--	5	--	5
Balances, February 29, 2020	23,015	$230	$85,530	$2,216	$(71,401)	$16,575	$(20)	$16,555

				Accumulated		Total Aehr Test
			Additional	Other		Systems		Total
	Common Stock		Paid-in	Comprehensive	Accumulated	Shareholders’	Noncontrolling	Shareholders'
Nine Months Ended February 29, 2020	Shares	Amount	Capital	Income (Loss)	Deficit	Equity	Interest	Equity
Balances, May 31, 2019	22,669	$227	$84,499	$2,230	$(71,484)	$15,472	$(19)	$15,453
Issuance of common stock under employee plans	346	3	420	--	--	423	--	423
Stock-based compensation	--	--	611	--	--	611	--	611
Net income	--	--	--	--	83	83	--	83
Foreign currency translation adjustment	--	--	--	(14)	--	(14)	(1)	(15)
Balances, February 29, 2020	23,015	$230	$85,530	$2,216	$(71,401)	$16,575	$(20)	$16,555

The accompanying notes are an integral part of these

condensed consolidated financial statements.

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AEHR TEST SYSTEMS

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Nine Months Ended
	February 28,	February 29,
	2021	2020
Cash flows from operating activities:
Net (loss) income	$(2,594)	$83
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Stock-based compensation expense	798	611
Depreciation and amortization	239	298
Gain on disposal of fixed asset	--	(2)
Net gain from dissolution of Aehr Test Systems Japan	(2,186)	--
Income tax benefit related to dissolution of Aehr Test Systems Japan	(215)	--
Changes in operating assets and liabilities:
Accounts receivable	1,063	1,360
Inventories	(349)	(157)
Prepaid expenses and other assets	(45)	170
Accounts payable	78	(1,033)
Accrued expenses	179	(674)
Customer deposits and deferred revenue	475	(1,315)
Other long-term liabilities	43	--
Income taxes payable	3	19
Net cash used in operating activities	(2,511)	(640)
Cash flows from investing activities:
Purchases of property and equipment	(205)	(151)
Proceeds from sales of property and equipment	--	2
Net cash used in investing activities	(205)	(149)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	483	423
Line of credit borrowings, net	1,400	--
Net cash provided by financing activities	1,883	423
Effect of exchange rates on cash, cash equivalents and restricted cash	138	(4)
Net decrease in cash, cash equivalent and restricted cash	(695)	(370)
Cash, cash equivalents and restricted cash, beginning of period	5,513	5,508
Cash, cash equivalents and restricted cash, end of period	$4,818	$5,138

Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$--	$112

The accompanying notes are an integral part of these

condensed consolidated financial statements.

8

AEHR TEST SYSTEMS

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2020 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2020. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

    The Company (as defined below) has been impacted by the outbreak of the novel coronavirus, known as COVID-19, which has spread throughout the world. Due to the impact of the COVID-19 pandemic on customers and customers’ customers, the Company experienced a drop in customer orders and revenues in the three and nine months ended February 28, 2021. In response, the Company has implemented cost reduction initiatives to mitigate operating losses, including mandatory vacation days, shutdown days, and executive staff pay reductions.

    The Company continues to monitor the situation. As of the date of this report, the Company cannot predict with certainty the potential effects the COVID-19 pandemic may have on the Company’s business and its operating results. While the overall environment remains uncertain, the Company continues to invest in priority areas with the objective of driving profitable growth over the long term.

    PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). On November 18, 2020, the Company established a wholly owned new subsidiary, Aehr Test Systems Philippines, which is in full operation as of March 2021. All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K. (“ATS-Japan”), the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations. As discussed in Note 16, the liquidation of ATS-Japan was completed on July 31, 2020.

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

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    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2020.There have been no significant changes in the Company’s significant accounting policies during the three and nine months ended February 28, 2021.

2. RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

3. REVENUE

Revenue recognition

    The Company recognizes revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below.

    Performance obligations include sales of systems, contactors, spare parts, and services, as well as installation and training services included in customer contracts.

    A contract’s transaction price is allocated to each distinct performance obligation. In determining the transaction price, the Company evaluates whether the price is subject to refund or adjustment to determine the net consideration to which the Company expects to be entitled. The Company generally does not grant return privileges, except for defective products during the warranty period.

    For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative standalone selling price basis. Standalone selling prices are based on multiple factors including, but not limited to, historical discounting trends for products and services and pricing practices in different geographies.

    Revenue for systems and spares are recognized at a point in time, which is generally upon shipment or delivery. Revenue from services is recognized over time as services are completed or ratably over the contractual period of generally one year or less.

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    The Company has elected the practical expedient to not assess whether a contract has a significant financing component as the Company’s standard payment terms are less than one year.

Disaggregation of revenue

    The following tables show revenues by major product categories. Within each product category, contract terms, conditions and economic factors affecting the nature, amount, timing and uncertainty around revenue recognition and cash flow are substantially similar.

    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Type of good / service:
Systems	$2,435	$2,138	$3,407	$8,099
Contactors	1,930	3,094	3,330	7,790
Services	902	879	2,225	2,629
	$5,267	$6,111	$8,962	$18,518
Product lines:
Wafer-level	$4,993	$5,408	$7,804	$16,570
Test During Burn-In	274	703	1,158	1,948
	$5,267	$6,111	$8,962	$18,518

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Geographic region:
United States	$1,113	$5,014	$3,124	$12,698
Asia	4,122	891	5,723	4,758
Europe	32	206	115	1,062
	$5,267	$6,111	$8,962	$18,518

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    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at a point in time when control transfers to customers. The following presents revenue based on timing of recognition (in thousands):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Timing of revenue recognition:
Products and services transferred at a point in time	$4,944	$5,485	$7,728	$16,666
Services transferred over time	323	626	1,234	1,852
	$5,267	$6,111	$8,962	$18,518

Contract balances

    A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset.

    Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of deferred revenue. Contract liabilities as of February 28, 2021 and May 31, 2020 were $667,000 and $192,000, respectively. During the three and nine months ended February 28, 2021, the Company recognized $29,000 and $154,000 respectively, of revenues that were included in contract liabilities as of May 31, 2020.

Remaining performance obligations

    On February 28, 2021, the Company had $129,000 of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts not yet delivered. The Company expects to recognize approximately $49,000 within one year from the balance sheet date and $80,000 thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Costs to obtain or fulfill a contract

    The Company generally expenses sales commissions when incurred as a component of selling, general and administrative expense as the amortization period is typically less than one year. Additionally, the majority of the Company’s cost of fulfillment as a manufacturer of products is classified as inventory and fixed assets, which are accounted for under the respective guidance for those asset types. Other costs of contract fulfillment are immaterial due to the nature of the Company’s products and their respective manufacturing process.

4. EARNINGS PER SHARE

    Basic earnings per share is determined using the weighted average number of common shares outstanding during the period. Diluted earnings per share is determined using the weighted average number of common shares and potential common shares (representing the dilutive effect of stock options, restricted stock units (“RSUs”), and Amended and Restated 2006 Employee Stock Purchase Plan (“ESPP”) shares) outstanding during the period using the treasury stock method.

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    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Numerator: Net (loss) income	$(735)	$245	$(2,594)	$83
Denominator for basic net (loss) income per share:
Weighted average shares outstanding	23,525	22,937	23,390	22,823
Shares used in basic net (loss) income per share calculation	23,525	22,937	23,390	22,823
Effect of dilutive securities	--	193	--	117
Denominator for diluted net (loss) income per share	23,525	23,130	23,390	22,940
Basic net (loss) income per share	$(0.03)	$0.01	$(0.11)	$0.00
Diluted net (loss) income per share	$(0.03)	$0.01	$(0.11)	$0.00

   For the purpose of computing diluted earnings per share, the weighted average number of potential common shares does not include stock options with an exercise price greater than the average fair value of the Company’s common stock for the period, as the effect would be anti-dilutive. In the three and nine months ended February 28, 2021 potential common shares have not been included in the calculation of diluted net loss per share as the effect would be anti-dilutive. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for these periods are the same. Stock options to purchase 2,804,000 shares of common stock, RSUs for 143,000 shares and ESPP rights to purchase 139,000 ESPP shares were outstanding as of February 28, 2021, but were not included in the computation of diluted net loss per share, because the inclusion of such shares would be anti-dilutive. Stock options to purchase 2,505,000 shares of common stock were outstanding as of February 29, 2020 but were not included in the computation of diluted net income per share, because the inclusion of such shares would be anti-dilutive.

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

    The Company’s financial instruments are measured at fair value consistent with authoritative guidance. This authoritative guidance defines fair value, establishes a framework for using fair value to measure assets and liabilities, and disclosures required related to fair value measurements.

    The guidance establishes a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels:

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Level 1 - instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.

Level 2 - instrument valuations are obtained from readily-available pricing sources for comparable instruments.

Level 3 - instrument valuations are obtained without observable market values and require a high level of judgment to determine the fair value.

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of February 28, 2021 (in thousands):

	Balance as of
	February 28, 2021	Level 1	Level 2	Level 3
Money market funds	$80	$80	$--	$--
Assets	$80	$80	$--	$--

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2020 (in thousands):

	Balance as of May 31, 2020	Level 1	Level 2	Level 3
Money market funds	$80	$80	$--	$--
Assets	$80	$80	$--	$--

    Included in money market funds as of February 28, 2021 and May 31, 2020 is $80,000 restricted cash representing a security deposit for the Company’s United States manufacturing and office space lease which is included in other assets in the consolidated balance sheets.

    There were no financial liabilities measured at fair value as of February 28, 2021 and May 31, 2020.

    There were no transfers between Level 1 and Level 2 fair value measurements during the three and nine months ended February 28, 2021.

    The carrying amounts of financial instruments including cash, cash equivalents, receivables, accounts payable and certain other accrued liabilities, approximate fair value due to their short maturities.

6. ACCOUNTS RECEIVABLE, NET

Accounts receivable represent customer trade receivables. As of February 28, 2021 and May 31, 2020, there were no allowances for doubtful accounts. Accounts receivable are derived from the sale of products throughout the world to semiconductor manufacturers, semiconductor contract assemblers, electronics manufacturers and burn-in and test service companies. The Company’s allowance for doubtful accounts is based upon historical experience and review of trade receivables by aging category to identify specific customers with known disputes or collection issues. Uncollectible receivables are recorded as bad debt expense when all efforts to collect have been exhausted and recoveries are recognized when they are received.

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7. INVENTORIES

    Inventories are comprised of the following (in thousands):

	February 28,	May 31,
	2021	2020
Raw materials and sub-assemblies	$5,626	$5,055
Work in process	2,713	2,917
Finished goods	--	17
	$8,339	$7,989

8. PRODUCT WARRANTIES

    The Company provides for the estimated cost of product warranties at the time revenues are recognized on the products shipped. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage or service delivery costs differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

    The standard warranty period is one year for systems and ninety days for parts and service.

    The following is a summary of changes in the Company's liability for product warranties during the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Balance at the beginning of the period	$244	$190	$246	$154
Accruals for warranties issued during the period	78	26	270	167
Adjustments to previously existing warranty accruals	259	--	346	--
Consumption of reserves	(81)	(30)	(362)	(135)
Balance at the end of the period	$500	$186	$500	$186

    The accrued warranty balance is included in accrued expenses on the accompanying condensed consolidated balance sheets.

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

    Customer deposits and deferred revenue, short-term (in thousands):

	February 28,	May 31,
	2021	2020
Customer deposits	$471	$--
Deferred revenue	116	170
	$587	$170

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10. INCOME TAXES

    Income taxes have been provided using the liability method whereby deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and net operating loss and tax credit carryforwards measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse or the carryforwards are utilized. Valuation allowances are established when it is determined that it is more likely than not that such assets will not be realized.

    Since fiscal 2009, a full valuation allowance was established against all deferred tax assets, as management determined that it is more likely than not that certain deferred tax assets will not be realized.

    The Company accounts for uncertain tax positions consistent with authoritative guidance. The guidance prescribes a “more likely than not” recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Company does not expect any material change in its unrecognized tax benefits over the next twelve months. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income taxes.

    On March 27, 2020, the “Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was passed into law. The CARES Act includes several significant business tax provisions including modification to the taxable income limitation for utilization of net operating losses (“NOLs”) incurred in 2018, 2019 and 2020 and the ability to carry back NOLs from those years for a period of up to five years, an increase to the limitation on deductibility of certain business interest expense, bonus depreciation for purchases of qualified improvement property and special deductions on certain corporate charitable contributions. The Company is currently analyzing the impact of these changes and therefore an estimate of the impact to income taxes is not yet available.

    On June 29, 2020, Assembly Bill 85 (AB 85) was signed into law as part of the California 2020 Budget Act, which temporarily suspends the use of California net operating losses and imposes a cap on the amount of business incentive tax credits that companies can utilize against their net income for tax years 2020, 2021, and 2022. The Company analyzed the provisions of AB 85 and determined there was no impact on its provision for income taxes for the current period and will continue to evaluate the impact, if any, AB 85 may have on the Company’s condensed consolidated financial statements and disclosures.

11. LEASES

    The Company has only operating leases for real estate including corporate offices, warehouse space and certain equipment. A lease with an initial term of 12 months or less is generally not recorded on the condensed consolidated balance sheet, unless the arrangement includes an option to purchase the underlying asset, or renew the arrangement that the Company is reasonably certain to exercise (short-term leases). The Company recognizes lease expense on a straight-line basis over the lease term for short-term leases that the Company does not record on its balance sheet. The Company’s operating leases have remaining lease terms of 1 month to 5 years.

    The Company determines whether an arrangement is or contains a lease based on the unique facts and circumstances present at the inception of the arrangement. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected lease term. The interest rate implicit in lease contracts is typically not readily determinable.

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    As such, the Company utilizes the appropriate incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term at an amount equal to the lease payments in a similar economic environment. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received.

    The weighted-average remaining lease term for the Company’s operating leases was 2.6 years at February 28, 2021 and the weighted-average discount rate was 5.4%.

    The Company’s operating lease cost was $193,000 and $568,000 for the three and nine months ended February 28, 2021, respectively. For the three and nine months ended February 29, 2020, operating lease cost was $183,000 and $548,000, respectively.

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Nine Months Ended
	February 28, 2021	February 29, 2020
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$579	$550

    The following table presents the maturities of the Company’s operating lease liabilities as of February 28, 2021 (in thousands):

Fiscal year	Operating Leases
2021 (excluding the first nine months of 2021)	$199
2022	810
2023	826
2024	164
2025	31
Thereafter	19
Total future minimum operating lease payments	$2,049
Less: imputed interest	(142)
Present value of operating lease liabilities	$1,907

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12. BORROWING AND FINANCING ARRANGEMENTS

    On January 16, 2020, the Company entered into a Loan and Security Agreement (the “Loan Agreement”) with Silicon Valley Bank (“SVB”). Pursuant to the Loan Agreement, the Company may borrow up to (a) the lesser of (i) the revolving line of $4.0 million or (ii) the amount available under the borrowing base minus (b) the outstanding principal balance of any advances, under a revolving line of credit which is collateralized by all the Company’s assets except intellectual property. The borrowing base is 80% of eligible accounts, as determined by SVB from the Company’s most recent borrowing base statement; provided, however, SVB has the right to decrease the foregoing percentage in its good faith business judgment to mitigate the impact of certain events or conditions, which may adversely affect the collateral or its value. Subject to an event of default, the principal amount outstanding under the revolving line of credit will accrue interest at a floating per annum rate equal to the greater of (a) the prime rate plus an additional percentage of up to 1%, which additional percentage depends on the Company’s adjusted quick ratio, and (b) 4.75%. Interest is payable monthly on the last calendar day of each month and the outstanding principal amount, the unpaid interest and all other obligations are due on the maturity date, which is 364 days from the effective date of January 13, 2020.

    On January 14, 2021, the Company entered into the First Amendment to Loan and Security Agreement (the “Amendment”) with Silicon Valley Bank. The Amendment, among other things, extends the Revolving Line Maturity Date to July 14, 2021; provided, however, that if the Company achieves specified operating metrics on a consolidated basis on or prior to May 31, 2021 the Amended Revolving Line Maturity Date is extended to January 13, 2022.

    At February 28, 2021, the Company had drawn $1,400,000 against the credit facility and was in compliance with all covenants related to obligations to meet reporting requirements. The balance available to borrow under the line at February 28, 2021 was $349,000. There are no financial covenants in the agreement.

13. LONG-TERM DEBT:

    On April 23, 2020, the Company obtained a Paycheck Protection ProgramLoan (the “PPP Loan”) in the aggregate amount of $1,679,000 from SVB. The PPP Loan was evidenced by a promissory note dated April 23, 2020 (the “Note”) that matures on April 23, 2022 and bears interest at a rate of 1% per annum. The PPP Loan proceeds were used for payroll, health care benefits, rent and utilities.

    Under the terms of the CARES Act, PPP loan recipients can apply for and be granted forgiveness for all or a portion of loans granted under the PPP. Such forgiveness will be determined, subject to limitations, based on the use of loan proceeds for payment of payroll costs, covered rent and mortgage obligations, and covered utility payments incurred by the Company. The Company applied on November 6, 2020 for loan forgiveness for the full amount of the borrowing and accrued interest. While the Small Business Administration has not yet reviewed and approved the application, going beyond 90 days after submission, the Company believes the expenses met the criteria for forgiveness. However, no assurance can be given that the Company will obtain forgiveness of the amount due under the loan in whole or in part.

14. STOCK-BASED COMPENSATION

    Stock-based compensation expense consists of expenses for stock options, RSUs, and ESPP purchase rights. Stock-based compensation expense for stock options and ESPP purchase rights is measured at each grant date, based on the fair value of the award using the Black-Scholes option valuation model, and is recognized as expense over the employee’s requisite service period. This model was developed for use in estimating the value of publicly traded options that have no vesting restrictions and are fully transferable. The Company’s employee stock options have characteristics significantly different from those of publicly traded options. For RSUs, stock-based compensation cost is based on the fair value of the Company’s common stock at the grant date. All of the Company’s stock-based compensation is accounted for as an equity instrument. See Note 11 in the Company’s Annual Report on Form 10-K for fiscal 2020 filed on August 28, 2020 for further information regarding the 2016 Equity Incentive Plan (the “2016 Plan”) and the ESPP.

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    The following table summarizes the stock-based compensation expense for the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$14	$19	$45	$58
Selling, general and administrative	194	137	593	401
Research and development	63	51	160	152
Total stock-based compensation	$271	$207	$798	$611

    As of February 28, 2021 and February 29, 2020, there were no stock-based compensation expenses capitalized as part of inventory.

    During the three months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to stock options and RSUs under the 2016 Plan of $253,000 and $166,000, respectively. During the nine months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to stock options and RSUs of $736,000 and $480,000, respectively.

    As of February 28, 2021, the total compensation expense related to unvested stock-based awards under the 2016 Plan, but not yet recognized, was approximately $1,151,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 2.6 years.

    During the three months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to the ESPP of $18,000 and $41,000, respectively. During the nine months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to the ESPP of $62,000 and $131,000, respectively.

    As of February 28, 2021, the total compensation expense related to purchase rights under the ESPP but not yet recognized was approximately $29,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 1.0 years.

Valuation Assumptions

    Valuation and Amortization Method. The Company estimates the fair value of stock options granted using the Black-Scholes option valuation model and a single option award approach. The fair value under the single option approach is amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.

    Expected Term. The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on historical experience, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as evidenced by changes to the terms of its stock-based awards.

    Volatility. Volatility is a measure of the amounts by which a financial variable such as stock price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company uses the historical volatility for the past four or five years based on weighted average of the expected term of option grants, to estimate expected volatility. Volatility for each of the ESPP’s four time periods of six months, twelve months, eighteen months, and twenty-four months is calculated separately and included in the overall stock-based compensation expense recorded.

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    Risk-Free Interest Rate. The Company bases the risk-free interest rate used in the Black-Scholes option valuation model on the implied yield in effect at the time of option grant on U.S. Treasury zero-coupon issues with a remaining term equivalent to the expected term of the stock awards including the ESPP.

    Fair Value. The fair values of the Company’s stock options granted to employees for the three and nine months ended February 28, 2021 and February 29, 2020, were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended	Nine Months Ended
	February 29,	February 28,	February 29,
	2020	2021	2020
Expected term (in years)	5	6	5
Volatility	0.72	0.72	0.71
Risk-free interest rate	1.57%	0.39%	1.85%
Weighted average grant date fair value	$1.37	$1.09	$0.98

    There were no stock options granted during the three months ended February 28, 2021.

    The fair values of the ESPP purchase rights granted for the nine months ended February 28, 2021 and February 29, 2020 were estimated using the following assumptions:

	Nine Months Ended	Nine Months Ended
	February 28, 2021	February 29, 2020
Expected term (in years)	0.5-2.0	0.5-2.0
Volatility	0.74-0.82	0.62-0.71
Expected dividend	$0.00	$0.00
Risk-free interest rates	0.10%-0.14%	1.56%-1.81%
Estimated forfeiture rate	0%	0%
Weighted average grant date fair value	$0.44	$0.80

    There were no ESPP purchase rights granted to employees for the three months ended February 28, 2021 and February 29, 2020. During the nine months ended February 28, 2021 and February 29, 2020, ESPP purchase rights of 81,000 and 38,000 were granted, respectively. Total ESPP shares issued during the nine months ended February 28, 2021 and February 29, 2020 were 72,000 and 71,000 shares, respectively. As of February 28, 2021, there were 511,000 ESPP shares available for issuance. As of February 29, 2020, there were 299,000 ESPP shares available for issuance.

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    The following tables summarize the Company’s stock option and RSU transactions during three and nine months ended February 28, 2021 (in thousands):

	Available
	Shares
Balance, May 31, 2020	1,650
Options granted	(200)
RSUs granted	(196)
Options cancelled	188
RSUs cancelled	2
Options expired	(125)
Balance, August 31, 2020	1,319
Options granted	(73)
RSUs granted	(57)
Options cancelled	185
Options expired	(162)
Balance, November 30, 2020	1,212
RSUs granted	(42)
Shares withheld for taxes and not issued	4
Options cancelled	21
Balance, February 28, 2021	1,195

    The following table summarizes the stock option transactions during the three and nine months ended February 28, 2021 (in thousands, except per share data):

	Outstanding Options
		Weighted
	Number	Average	Aggregate
	of	Exercise	Intrinsic
	Shares	Price	Value
Balances, May 31, 2020	3,153	$2.17	$102
Options granted	200	$1.86
Options cancelled	(188)	$2.18
Options exercised	(148)	$1.30
Balances, August 31, 2020	3,017	$2.19	$148
Options granted	73	$1.44
Options cancelled	(185)	$2.42
Options exercised	(19)	$1.67
Balances, November 30, 2020	2,886	$2.16	$56
Options cancelled	(21)	$1.86
Options exercised	(61)	$2.07
Balances, February 28, 2021	2,804	$2.16	$1,994
Options fully vested and expected to vest at February 28, 2021	2,769	$2.17	$1,967

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    The options outstanding and exercisable at February 28, 2021 were in the following exercise price ranges (in thousands, except per share data):

	Options Outstanding			Options Exercisable
	at February 28, 2021			at February 28, 2021
Range of Exercise Prices	Number Outstanding Shares	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price	Number Exercisable Shares	Weighted Average Remaining Contractual Life (Years)	Weighted Average Exercise Price	Aggregate Intrinsic Value
$1.22-$1.34	133	6.30	$1.27	36	6.36	$1.28
$1.64-$1.86	1,047	5.04	$1.70	589	4.50	$1.69
$2.03-$2.46	1,017	3.25	$2.21	781	2.86	$2.19
$2.63-$2.81	405	0.66	$2.71	404	0.65	$2.71
$3.46-$3.93	202	3.41	$3.86	184	3.41	$3.85
$1.22-$3.93	2,804	3.70	$2.16	1,994	3.01	$2.28	$1,224

    The total intrinsic value of options exercised during the three and nine months ended February 28, 2021 was $57,000 and $151,000, respectively. The total intrinsic value of options exercised during the three and nine months ended February 29, 2020 was $92,000 and $159,000, respectively. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at February 28, 2021 was 3.68 years. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at February 29, 2020 was 3.78 years.

    During the three months ended February 28, 2021, RSUs for 4,000 shares, net of 4,000 shares withheld to settle payroll taxes, were granted and fully vested to employees. The market value on the date of the grant of these RSUs was $2.25 per share. During the nine months ended February 28, 2021, RSUs for 165,000 shares, net of 4,000 shares withheld to settle payroll taxes, were granted to employees. The weighted average market value on the date of the grant of these RSUs was $1.87 per share. During the three and nine months ended February 28, 2021, 19,000 and 34,000 RSUs became fully vested, respectively. As of February 28, 2021, 143,000 RSUs remain unvested which had an intrinsic value of $400,000. There were no RSUs granted to employees during the three and nine months ended February 29, 2020. During the three and nine months ended February 29, 2020, 3,000 and 10,000 RSUs became fully vested, respectively. As of February 29, 2020, 13,000 RSUs remain unvested which had an intrinsic value of $27,000.

    During the three months ended February 28, 2021, RSUs for 34,000 shares were granted to members of the Company’s Board of Directors for Board fees. The market value on the date of the grant of these RSUs was $2.25 per share. During the nine months ended February 28, 2021, RSUs for 126,000 shares were granted to members of the Company’s Board of Directors for Board fees. The weighted average market value on the date of the grant of these RSUs was $1.73 per share. All of these RSUs were immediately fully vested. There were no RSUs granted to members of the Company’s Board of Directors during the three and nine months ended February 29, 2020.

15. SEGMENT INFORMATION

    The Company has only one reportable segment. The information for revenue category by type, product line, geography and timing of revenue recognition, is summarized in Note “3. REVENUE.”

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	February 28,	May 31,
	2021	2020
United States	$612	$662
Asia	5	1
Europe	--	--
	$617	$663

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    As of February 28, 2021, the operating lease right-of-use assets of $1,763,000 were allocated in the United States.

    There were no revenues through distributors for the three and nine months ended February 28, 2021 and February 29, 2020.

    Sales to the Company’s five largest customers accounted for approximately 95% and 82% of its net sales in the three and nine months ended February 28, 2021, respectively. Four customers accounted for approximately 55%,15%, 11% and 11% of the Company’s net sales in the three months ended February 28, 2021. Four customers accounted for approximately 33%,15%, 14% and 11% of the Company’s net sales in the nine months ended February 28, 2021. Sales to the Company’s five largest customers accounted for approximately 94% and 89% of its net sales in the three and nine months ended February 29, 2020, respectively. One customer accounted for approximately 71% of the Company’s net sales in the three months ended February 29, 2020. Two customers accounted for approximately 51% and 18% of the Company’s net sales in the nine months ended February 29, 2020. No other customers represented more than 10% of the Company’s net sales in the three and nine months ended February 28, 2021 and February 29, 2020.

16. DISSOLUTION OF AEHR TEST SYSTEMS JAPAN

    On July 31, 2020, the Company completed the liquidation of ATS-Japan, a majority owned subsidiary. Accordingly, the Company deconsolidated ATS-Japan and recognized an aggregate net gain of $2,401,000 for the period ended August 31, 2020. The net gain was mainly due to cumulative translation adjustment reclassified into earnings of $2,186,000 and the residual income tax effect in connection with the cumulative translation adjustment released into income tax benefits of $215,000.

Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

    The following discussion of the financial condition and results of operations should be read in conjunction with the unaudited condensed consolidated financial statements and the related notes that appear elsewhere in this report and with our Annual Report on Form 10-K for the fiscal year ended May 31, 2020 and the consolidated financial statements and notes thereto.

    In addition to historical information, this report contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements in this report, including those made by our management, other than statements of historical fact, are forward-looking statements. These statements typically may be identified by the use of forward-looking words or phrases such as "believe," "expect," "intend," "anticipate," "should," "planned," "estimated," and "potential," among others and include, but are not limited to, statements concerning our expectations regarding our operations, business, strategies, prospects, revenues, expenses, costs and resources. These forward-looking statements include management’s judgments, estimates and assumptions and are subject to certain risks and uncertainties that could cause our actual results to differ materially from anticipated results or other expectations reflected in forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in this report and other factors beyond our control, and in particular, the risks discussed in “Part II, Item 1A. Risk Factors” and those discussed in other documents we file with the SEC. All forward-looking statements included in this document are based on our current expectations, and we undertake no obligation to revise or publicly release the results of any revision to these forward-looking statements. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements.

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    Investors and others should note that we announce material financial information to our investors using our investor relations website (https://www.aehr.com/investor-relations/), SEC filings, press releases, public conference calls and webcasts. We use these channels to communicate with our investors and the public about our company, our products and services and other issues. It is possible that the information we post on our investor relations website could be deemed to be material information. Therefore, we encourage investors, the media, and others interested in our company to review the information we post on our investor relations website.

COVID-19 PANDEMIC RESPONSE

    The Company has been impacted by the outbreak of the novel coronavirus, known as COVID-19, which has spread throughout the world. The Company’s top priority during the COVID-19 pandemic is protecting the health and safety of its employees and their families, customers and community. We introduced policies and procedures to increase workplace flexibility, such as working remotely where possible to reduce the number of people who are on campus each day. As a global supplier of Critical Infrastructure Sectors, as defined by the Cybersecurity and Infrastructure Security Agency, we have supported and continue to support customers during the pandemic. In the interest of public health, all onsite operations generally use the minimum number of people to safely execute tasks and follow enhanced safety and health protocols including screenings, social distancing, and use of personal protective equipment.

    Due to the impact of the COVID-19 pandemic on customers and customers’ customers, the Company experienced a significant drop in customer orders and revenues in the three and nine months ended February 28, 2021. In response, we have implemented cost reduction initiatives to mitigate operating losses, including mandatory vacation days, shutdown days, and executive staff pay reductions.

    We continue to monitor the situation. As of the date of this report, we cannot predict with certainty the potential effects the COVID-19 pandemic may continue to have on our business and our operating results. While the overall environment remains uncertain, we continue to invest in priority areas with the objective of driving profitable growth over the long term.

OVERVIEW

    We were founded in 1977 to develop and manufacture burn-in and test equipment for the semiconductor industry. Since our inception, we have sold more than 2,500 systems to semiconductor manufacturers, semiconductor contract assemblers and burn-in and test service companies worldwide. Our principal products currently are the FOX full wafer contact parallel test and burn-in system, WaferPak aligners, WaferPak contactors, DiePak autoloaders, the DiePak carrier, test fixtures and the Advanced Burn-in and Test System, or ABTS.

    Our net sales consist primarily of sales of systems, WaferPak aligners, WaferPak contactors, DiePak autoloaders, DiePak carriers, test fixtures, upgrades and spare parts, revenues from service contracts, and engineering development charges. Our selling arrangements may include contractual customer acceptance provisions, which are mostly deemed perfunctory or inconsequential, and installation of the product occurs after shipment and transfer of title.

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CRITICAL ACCOUNTING POLICIES AND ESTIMATES

    Our discussion and analysis of our financial condition and results of operations are based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of these condensed consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, assumptions and judgments, including those related to customer programs and incentives, product returns, bad debts, inventories, income taxes, financing operations, warranty obligations, and long-term service contracts. Our estimates are derived from historical experience and on various other assumptions that are believed to be reasonable under the circumstances. Those results form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. For a discussion of the critical accounting policies, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies and Estimates” in our Annual Report on Form 10-K for the fiscal year ended May 31, 2020.

    There have been no material changes to our critical accounting policies and estimates during the three and nine months ended February 28, 2021 compared to those discussed in our Annual Report on Form 10-K for the fiscal year ended May 31, 2020.

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RESULTS OF OPERATIONS

    The following table sets forth items in our unaudited condensed consolidated statements of operations as a percentage of net sales for the periods indicated.

	Three Months Ended		Nine Months Ended
	February 28,	February 29,	February 28,	February 29,
	2021	2020	2021	2020
Net sales	100.0%	100.0%	100.0%	100.0%
Cost of sales	64.0	51.1	72.1	54.3
Gross profit	36.0	48.9	27.9	45.7
Operating expenses:
Selling, general and administrative	31.2	30.9	52.0	31.6
Research and development	17.2	13.8	29.3	13.7
Total operating expenses	48.4	44.7	81.3	45.3
(Loss) income from operations	(12.4)	4.2	(53.4)	0.4
Interest (expense) income, net	(0.2)	0.2	(0.4)	0.2
Net gain from dissolution of Aehr Test Systems Japan	--	--	24.4	--
Other (expense) income, net	(0.7)	(0.2)	(1.5)	--
(Loss) income before income tax (expense) benefit	(13.3)	4.2	(30.9)	0.6
Income tax (expense) benefit	(0.7)	(0.2)	2.0	(0.2)
Net (loss) income	(14.0)	4.0	(28.9)	0.4
Less: Net income attributable to the noncontrolling interest	--	--	--	--
Net (loss) income attributable to Aehr Test Systems common shareholders	(14.0)%	4.0%	(28.9)%	0.4%

THREE MONTHS ENDED FEBRUARY 28, 2021 COMPARED TO THREE MONTHS ENDED FEBRUARY 29, 2020

    NET SALES. Net sales decreased to $5.3 million for the three months ended February 28, 2021 from $6.1 million for the three months ended February 29, 2020, a decrease of 13.8%. The decrease in net sales for the three months ended February 28, 2021 was impacted by the continued challenging global business environment created by the COVID-19 pandemic which resulted in the decrease in net sales of both our wafer-level products and Test During Burn-in (TDBI) products. Net sales of the wafer-level products for the three months ended February 28, 2021 were $5.0 million, and decreased approximately $415,000 from the three months ended February 29, 2020. Net sales of the TDBI products for the three months ended February 28, 2021 were $274,000, and decreased approximately $429,000 from the three months ended February 29, 2020.

    GROSS PROFIT. Gross profit decreased to $1.9 million for the three months ended February 28, 2021 from $3.0 million for the three months ended February 29, 2020, a decrease of 36.7%. Gross profit margin decreased to 36.0% for the three months ended February 28, 2021 from 48.9% for the three months ended February 29, 2020. The decrease in gross profit margin was primarily due to increased warranty provision, including a $299,000 charge related to a voluntary replacement of a component to improve long term reliability of our systems, resulting in a 6.0% gross profit margin reduction, manufacturing inefficiencies due to a lower level of net sales resulting in a 3.0% gross profit margin reduction, and a higher level of inventory reserves recordedresulting in 1.6% gross profit margin reduction.

26

    SELLING, GENERAL AND ADMINISTRATIVE. SG&A expenses decreased to $1.6 million for the three months ended February 28, 2021 from $1.9 million for the three months ended February 29, 2020, a decrease of 13.1%. The decrease in SG&A expenses was primarily due to a decrease in employment related expenses due to cost reduction initiatives.

    RESEARCH AND DEVELOPMENT. R&D expenses increased to $903,000 for the three months ended February 28, 2021 from $845,000 for the three months ended February 29, 2020, an increase of 6.9%. The increase in R&D expenses was primarily due to an increase in employment related expenses.

    INTEREST (EXPENSE) INCOME, NET. Interest expense, net for the three months ended February 28, 2021 was $10,000 compared with interest income, net for the three months ended February 29, 2020 of $13,000. The interest expense for the three months ended February 28, 2021 was from the PPP Loan that we obtained on April 23, 2020.

    OTHER (EXPENSE) INCOME, NET. Other expense, net was $39,000 and $9,000 for the three months ended February 28, 2021 and February 29, 2020, respectively. The change in other expense, net was primarily due to losses realized in connection with the fluctuation in the value of the dollar compared to foreign currencies during the referenced periods.

    INCOME TAX (EXPENSE) BENEFIT. Income tax expense was $34,000 and $14,000 for the three months ended February 28, 2021 and February 29, 2020, respectively.

NINE MONTHS ENDED FEBRUARY 28, 2021 COMPARED TO NINE MONTHS ENDED FEBRUARY 29, 2020

    NET SALES. Net sales decreased to $9.0 million for the nine months ended February 28, 2021 from $18.5 million for the nine months ended February 29, 2020, a decrease of 51.6%. The decrease in net sales for the nine months ended February 28, 2021 was impacted by the continued challenging global business environment created by the COVID-19 pandemic which resulted in the decrease in net sales of both our wafer-level products and TDBI products. Net sales of the wafer-level products for the nine months ended February 28, 2021 were $7.8 million, and decreased approximately $8.8 million from the nine months ended February 29, 2020. Net sales of the TDBI products for the nine months ended February 28, 2021 were $1.2 million, and decreased approximately $790,000 from the nine months ended February 29, 2020.

    GROSS PROFIT. Gross profit decreased to $2.5 million for the nine months ended February 28, 2021 from $8.5 million for the nine months ended February 29, 2020, a decrease of 70.5%. Gross profit margin decreased to 27.9% for the nine months ended February 28, 2021 from 45.7% for the nine months ended February 29, 2020. The decrease in gross profit margin was primarily due to manufacturing inefficiencies due to a lower level of net sales resulting in a 8.6% gross profit margin reduction, increased warranty provision, including a $299,000 charge related to a voluntary replacement of a component to improve long term reliability of our systems, resulting in a 6.0% gross profit margin reduction, and a higher level of inventory reserves recordedresulting in 1.2% gross profit margin reduction.

    SELLING, GENERAL AND ADMINISTRATIVE. SG&A expenses decreased to $4.7 million for the nine months ended February 28, 2021 from $5.9 million for the nine months ended February 29, 2020, a decrease of 20.5%. The decrease in SG&A expenses was primarily due to a decrease in employment related expenses due to cost reduction initiatives.

27

    RESEARCH AND DEVELOPMENT. R&D expenses increased to $2.6 million for the nine months ended February 28, 2021 from $2.5 million for the nine months ended February 29, 2020, an increase of 3.6%. The increase in R&D expenses was primarily due to an increase in R&D material expenses.

    INTEREST (EXPENSE) INCOME, NET. Interest expense, net for the nine months ended February 28, 2021 was $35,000 compared with interest income, net for the nine months ended February 29, 2020 of $27,000. The interest expense for the nine months ended February 28, 2021 was from the PPP Loan that we obtained on April 23, 2020.

    NET GAIN FROM DISSOLUTION OF AEHR TEST SYSTEMS JAPAN. Net gain from dissolution of Aehr Test Systems Japan was $2.2 million for the nine months ended February 28, 2021, due to the release of the cumulative translation adjustment in connection with the complete liquidation of Aehr Test Systems Japan subsidiary in July 2020.

    OTHER (EXPENSE) INCOME, NET. Other expense, net for the nine months ended February 28, 2021 was $139,000 compared with other income, net for the nine months ended February 29, 2020 of $6,000. The changes in other (expense) income, net was primarily due to losses or gains realized in connection with the fluctuation in the value of the dollar compared to foreign currencies during the referenced periods.

    INCOME TAX (EXPENSE) BENEFIT. Income tax benefit for the nine months ended February 28, 2021 was $177,000 compared with income tax expense of $26,000 for the nine months ended February 29, 2020. During the nine months ended February 28, 2021, the currency translation adjustment balance was released and the residual income tax effect of $215,000 was recorded pursuant to the inter-period allocation rules in connection with the complete liquidation of Aehr Test Systems Japan subsidiary in July 2020.

LIQUIDITY AND CAPITAL RESOURCES

    Net cash used in operating activities was $2.5 million and $640,000 for the nine months ended February 28, 2021 and February 29, 2020, respectively. For the nine months ended February 28, 2021, net cash used in operating activities was primarily the result of net loss of $2.6 million, as adjusted to exclude the effect of net gain from dissolution of Aehr Test Systems Japan of $2.4 million, including an income tax benefit of $215,000, a non-cash charge of stock-based compensation expense of $798,000 and depreciation and amortization of $239,000. Net cash used in operations was also impacted by a decrease in accounts receivable of $1.1 million. The decrease in accounts receivable was primarily due to a decrease in sales for the nine months ended February 28, 2021 compared with the nine months ended May 31, 2020. For the nine months ended February 29, 2020, net cash used in operating activities was primarily the result of net income of $83,000, as adjusted to exclude the effect of non-cash charges of stock-based compensation expense of $611,000 and depreciation and amortization expenses of $298,000. Net cash used in operations was also impacted by a decrease in accounts receivable of $1.4 million, partially offset by a decrease in customer deposits and deferred revenue of $1.3 million and a decrease in accounts payable of $1.0 million. The decrease in accounts receivable was primarily due to improvements in customer payment terms. The decrease in customer deposits and deferred revenue was primarily due to the decrease in backlog of customer orders with down payments. The decrease in accounts payable was primarily due to lower inventory purchases.

    Net cash used in investing activities was $205,000 and $149,000 for the nine months ended February 28, 2021 and February 29, 2020, respectively. Net cash used in investing activities during the nine months ended February 28, 2021 and February 29, 2020 was primarily due to purchases of property and equipment.

28

    Financing activities provided cash of $1.9 million and $423,000 for the nine months ended February 28, 2021 and February 29, 2020, respectively. Net cash provided by financing activities during the nine months ended February 28, 2021 was due to $1.4 million borrowing from our line of credit and $483,000 in proceeds from the issuance of common stock under employee plans. Net cash provided by financing activities during the nine months ended February 29, 2020 was due to the proceeds from the issuance of common stock under employee plans.

    The effect of fluctuation in exchange rates increased cash by $138,000 for the nine months ended February 28, 2021 and decreased cash by $4,000 for the nine months ended February 29, 2020. The changes were due to the fluctuation in the value of the dollar compared to foreign currencies.

    As of February 28, 2021 and May 31, 2020, we had working capital of $9.5 million and $13.8 million, respectively.

    We lease our manufacturing and office space under operating leases. We entered into a non-cancelable operating lease agreement for our United States manufacturing and office facilities, which was renewed in February 2018 and expires in July 2023. Under the lease agreement, we are responsible for payments of utilities, taxes and insurance.

    From time to time, we evaluate potential acquisitions of businesses, products or technologies that complement our business. If consummated, any such transactions may use a portion of our working capital or require the issuance of equity. We have no present understandings, commitments or agreements with respect to any material acquisitions.

    Since inception, we have incurred substantial cumulative losses and negative cash flows from operations. In response, we took steps to minimize expense levels, entered into credit arrangements, and raised capital through public and private equity offerings, to increase the likelihood that we will have sufficient cash to support operations. We anticipate that the existing cash balance together with future income from operations, collections of existing accounts receivable, revenue from our existing backlog of products of $4.6 million as of this filing date, the sale of inventory on hand, deposits and down payments against significant orders will be adequate to meet our working capital and capital equipment requirement needs over the next 12 months. Our future capital requirements will depend on many factors, including our growth rate, the timing and extent of our spending to support research and development activities, the timing and cost of establishing additional sales and marketing capabilities, the timing and cost to introduce new and enhanced products and the timing and cost to implement new manufacturing technologies. In the event that additional financing is required from outside sources, we may not be able to raise it on terms acceptable to us or at all. Any additional debt financing obtained by us in the future could also involve restrictive covenants relating to our capital-raising activities and other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. Additionally, if we raise additional funds through further issuances of equity, convertible debt securities or other securities convertible into equity, our existing stockholders could suffer significant dilution in their percentage ownership of the Company, and any new equity securities we issue could have rights, preferences and privileges senior to those of holders of our common stock. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our ability to continue to grow or support our business and to respond to business challenges could be significantly limited.

29

OFF-BALANCE SHEET ARRANGEMENTS

    We have not entered into any off-balance sheet financing arrangements and have not established any variable interest entities.

OVERVIEW OF CONTRACTUAL OBLIGATIONS

    There have been no material changes in the composition, magnitude or other key characteristics of our contractual obligations or other commitments as disclosed in the Company's Annual Report on Form 10-K for the year ended May 31, 2020.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

    We had no holdings of derivative financial or commodity instruments as of February 28, 2021 or May 31, 2020.

    We are exposed to financial market risks, including changes in interest rates and foreign currency exchange rates. We only invest our short-term excess cash in government-backed securities with maturities of 18 months or less. We do not use any financial instruments for speculative or trading purposes. Fluctuations in interest rates would not have a material effect on our financial position, results of operations or cash flows.

    A majority of our revenue and capital spending is transacted in U.S. Dollars. We also enter into transactions in other currencies, primarily Euros and Philippine Peso. Since our subsidiaries’ financial statements are based in their local currency and our condensed consolidated financial statements are based in U.S. Dollars, we and our subsidiaries recognize foreign exchange gains or losses in any period in which the value of the local currency rises or falls in relation to the U.S. Dollar. A 10% decrease in the value of the subsidiaries’ local currency as compared with the U.S. Dollar would not be expected to result in a significant change to our net income or loss. There have been no material changes in our risk exposure since the end of the last fiscal year, nor are any material changes to our risk exposure anticipated.

Item 4. CONTROLS AND PROCEDURES

    EVALUATION OF DISCLOSURE CONTROLS AND PROCEDURES. Our management evaluated, with the participation of our Chief Executive Officer and our Chief Financial Officer, the effectiveness of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures are effective to ensure that information we are required to disclose in reports that we file or submit under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms, and that such information is accumulated and communicated to management as appropriate to allow for timely decisions regarding required disclosure.

    CHANGES IN INTERNAL CONTROLS OVER FINANCIAL REPORTING. There was no change in our internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, that occurred during the period covered by this Quarterly Report on Form 10-Q that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

30

    INHERENT LIMITATIONS OF INTERNAL CONTROLS. Our management, including our Chief Executive Officer and Chief Financial Officer, does not expect that our disclosure controls and procedures or our internal controls will prevent all error and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within us have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of a simple error or mistake. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving our stated goals under all potential future conditions. Over time, controls may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

PART II - OTHER INFORMATION

Item 1. LEGAL PROCEEDINGS

    None.

Item 1A. RISK FACTORS

    Please refer to the description of the risk factors associated with our business previously disclosed in Part I, Item 1A - "Risk Factors" of our Annual Report on Form 10-K for the year ended May 31, 2020 filed with the Securities and Exchange Commission on August 28, 2020.

Item 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

    None.

Item 3. DEFAULTS UPON SENIOR SECURITIES

    None.

Item 4. MINE SAFETY DISCLOSURES

    Not Applicable

Item 5. OTHER INFORMATION

    None.

31

Item 6. EXHIBITS

Exhibit No.	Description
3.1(1)	Amended and Restated Bylaws of the Registrant.
4.2(2)	Amended and Restated 2006 Employee Stock Purchase Plan.
10.1(3)	First Amendment to Loan and Security Agreement, dated as of January 14, 2021, by and between Silicon Valley Bank and Aehr Test Systems.
31.1	Certification of Chief Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer pursuant to Rules 13a-14(a) and 15d-14(a) promulgated under the Securities Exchange Act of 1934, as amended, as adopted pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

(1)  Incorporated by reference to Exhibit 3.1 previously filed with the Company’s Current Report on Form 8-K filed with the SEC on September 9, 2020 (File No. 000-22893).

(2)  Incorporated by reference to Exhibit 4.2 previously filed with the Company’s Form S-8 filed November 14, 2016 (File No. 333-214589), as deemed to be amended by the share increase approved at the 2020 Annual Meeting of Shareholders.

(3)  Incorporated by reference to Exhibit 10.1 previously filed with the Company’s Form 8-K filed with the SEC on January 20, 2021 (File No. 000-22893).

*This exhibit shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filings under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether made before or after the date hereof and irrespective of any general incorporation language in any filings.

32

SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Aehr Test Systems
	(Registrant)
Date: April 13, 2021	By:	/s/ GAYN ERICKSON
		Gayn Erickson
		President and Chief Executive Officer (Principal Executive Officer)

Date: April 13, 2021	By:	/s/ KENNETH B. SPINK
		Kenneth B. Spink
		Vice President of Finance and Chief Financial Officer (Principal Financial and Accounting Officer)

33

EX-31.1

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 302(a) OF THE

SARBANES-OXLEY ACT

I, Gayn Erickson, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aehr Test Systems;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 13, 2021

/s/ GAYN ERICKSON

Gayn Erickson

President and Chief Executive Officer

(Principal Executive Officer)

EX-31.2

                                                                Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER PURSUANT TO SECTION 302(a) OF THE

SARBANES-OXLEY ACT

I, Kenneth B. Spink, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Aehr Test Systems;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

 a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

 b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

 c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

 d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: April 13, 2021

/s/ KENNETH B. SPINK

Kenneth B. Spink

Vice President of Finance and Chief Financial Officer

(Principal Financial and Accounting Officer)

EX-32.1

Exhibit 32

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Gayn Erickson, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge, the Quarterly Report of Aehr Test Systems on Form 10-Q for the period ended February 28, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Aehr Test Systems.

 

Date: April 13, 2021
	/s/ GAYN ERICKSON
	Gayn Erickson
	President and Chief Executive Officer (Principal Executive Officer)

I, Kenneth B. Spink, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge, the Quarterly Report of Aehr Test Systems on Form 10-Q for the period ended February 28, 2021 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Aehr Test Systems.

 

Date: April 13, 2021
	/s/ KENNETH B. SPINK
	Kenneth B. Spink
	Vice President of Finance and Chief Financial Officer (Principal Financial and Accounting Officer)

XML

Document and Entity Information - shares	9 Months Ended
	Feb. 28, 2021	Mar. 31, 2021
Cover [Abstract]
Entity Registrant Name	AEHR TEST SYSTEMS
Entity Central Index Key	0001040470
Document Type	10-Q
Document Period End Date	Feb. 28, 2021
Amendment Flag	false
Current Fiscal Year End Date	--05-31
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	CA
Entity File Number	000-22893
Is Entity's Reporting Status Current?	Yes
Entity Filer Category	Non-accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		23,597,730
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020	[1]
ASSETS
Cash and cash equivalents	$ 4,738	$ 5,433
Accounts receivable, net	2,721	3,717
Inventories	8,339	7,989
Prepaid expenses and other current assets	571	512
Total current assets	16,369	17,651
Property and equipment, net	617	663
Operating lease right-of-use assets	1,763	2,107
Other assets	142	153
Total assets	18,891	20,574
LIABILITIES AND SHAREHOLDERS' EQUITY
Line of Credit	1,400	0
Accounts payable	1,086	945
Accrued expenses	1,624	1,439
Operating lease liabilities, short-term	722	658
Customer deposits and deferred revenue, short-term	587	170
Current portion of long-term debt	1,492	653
Total current liabilities	6,911	3,865
Operating lease liabilities, long-term	1,185	1,605
Long-term debt, net of current portion	187	1,026
Deferred revenue, long -term	80	22
Other long-term liabilities	43	0
Total liabilities	8,406	6,518
Aehr Test Systems shareholders' equity:
Common stock, $0.01 par value: Authorized: 75,000 shares; Issued and outstanding: 23,598 shares and 23,107 shares at February 28, 2021 and May 31, 2020, respectively	236	231
Additional paid-in capital	87,174	85,898
Accumulated other comprehensive (loss) income	(45)	2,234
Accumulated deficit	(76,880)	(74,286)
Total Aehr Test Systems shareholders' equity	10,485	14,077
Noncontrolling interest	0	(21)
Total shareholders' equity	10,485	14,056
Total liabilities and shareholders' equity	$ 18,891	$ 20,574

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

XML

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Feb. 28, 2021	May 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value per share (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in thousands)	75,000	75,000
Common stock, shares issued (in thousands)	23,598	23,107
Common stock, shares outstanding (in thousands)	23,598	23,107

XML

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Income Statement [Abstract]
Net sales	$ 5,267	$ 6,111	$ 8,962	$ 18,518
Cost of sales	3,373	3,120	6,464	10,054
Gross profit	1,894	2,991	2,498	8,464
Operating expenses:
Selling, general and administrative	1,643	1,891	4,658	5,856
Research and development	903	845	2,623	2,532
Total operating expenses	2,546	2,736	7,281	8,388
(Loss) income from operations	(652)	255	(4,783)	76
Interest (expense) income, net	(10)	13	(35)	27
Net gain from dissolution of Aehr Test Systems Japan	0	0	2,186	0
Other (expense) income, net	(39)	(9)	(139)	6
(Loss) income before income tax (expense) benefit	(701)	259	(2,771)	109
Income tax (expense) benefit	(34)	(14)	177	(26)
Net (loss) income	(735)	245	(2,594)	83
Less: Net income attributable to the noncontrolling interest	0	0	0	0
Net (loss) income attributable to Aehr Test System common shareholders	$ (735)	$ 245	$ (2,594)	$ 83
Net (loss) income per share:
Basic	$ (0.03)	$ 0.01	$ (0.11)	$ 0
Diluted	$ (0.03)	$ 0.01	$ (0.11)	$ 0
Shares used in per share calculations:
Basic (in thousands)	23,525	22,937	23,390	22,823
Diluted (in thousands)	23,525	23,130	23,390	22,940

XML

Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (735)	$ 245	$ (2,594)	$ 83
Other comprehensive income (loss), net of tax:
Net change in cumulative translation adjustment	39	5	143	(15)
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan	0	0	(2,401)	0
Total comprehensive (loss) income	(696)	250	(4,852)	68
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	0	21	(1)
Comprehensive (loss) income, attributable to Aehr Test Systems common shareholders	$ (696)	$ 250	$ (4,873)	$ 69

XML

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Total Aehr Test Systems Shareholders' Equity	Noncontrolling Interest	Total
Beginning balance, shares (in thousands) at May. 31, 2019	22,669
Beginning balance, amount at May. 31, 2019	$ 227	$ 84,499	$ 2,230	$ (71,484)	$ 15,472	$ (19)	$ 15,453
Issuance of common stock under employee plans, shares (in thousands)	346
Issuance of common stock under employee plans, amount	$ 3	420			423		423
Stock-based compensation		611			611		611
Net (loss) income				83	83		83
Foreign currency translation adjustment			(14)		(14)	(1)	(15)
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan							0
Ending balance, shares (in thousands) at Feb. 29, 2020	23,015
Ending balance, amount at Feb. 29, 2020	$ 230	85,530	2,216	(71,401)	16,575	(20)	16,555
Beginning balance, shares (in thousands) at Nov. 30, 2019	22,914
Beginning balance, amount at Nov. 30, 2019	$ 229	85,194	2,211	(71,646)	15,988	(20)	15,968
Issuance of common stock under employee plans, shares (in thousands)	101
Issuance of common stock under employee plans, amount	$ 1	129			130		130
Stock-based compensation		207			207		207
Net (loss) income				245	245		245
Foreign currency translation adjustment			5		5		5
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan							0
Ending balance, shares (in thousands) at Feb. 29, 2020	23,015
Ending balance, amount at Feb. 29, 2020	$ 230	85,530	2,216	(71,401)	16,575	(20)	16,555
Beginning balance, shares (in thousands) at May. 31, 2020	23,107
Beginning balance, amount at May. 31, 2020	$ 231	85,898	2,234	(74,286)	14,077	(21)	14,056	[1]
Issuance of common stock under employee plans, shares (in thousands)	491
Issuance of common stock under employee plans, amount	$ 5	478			483		483
Stock-based compensation		798			798		798
Net (loss) income				(2,594)	(2,594)		(2,594)
Foreign currency translation adjustment			144		144	(1)	143
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan			(2,423)		(2,423)	22	(2,401)
Ending balance, shares (in thousands) at Feb. 28, 2021	23,598
Ending balance, amount at Feb. 28, 2021	$ 236	87,174	(45)	(76,880)	10,485	0	10,485
Beginning balance, shares (in thousands) at Nov. 30, 2020	23,487
Beginning balance, amount at Nov. 30, 2020	$ 235	86,786	(62)	(76,167)	10,792	0	10,792
Issuance of common stock under employee plans, shares (in thousands)	111
Issuance of common stock under employee plans, amount	$ 1	117			118		118
Stock-based compensation		271			271		271
Net (loss) income				(735)	(735)		(735)
Foreign currency translation adjustment			17	22	39		39
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Systems Japan							0
Ending balance, shares (in thousands) at Feb. 28, 2021	23,598
Ending balance, amount at Feb. 28, 2021	$ 236	$ 87,174	$ (45)	$ (76,880)	$ 10,485	$ 0	$ 10,485

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Cash flows from operating activities:
Net loss	$ (2,594)	$ 83
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	798	611
Depreciation and amortization	239	298
Gain on disposal of fixed asset	0	(2)
Net gain from dissolution of Aehr Test Systems Japan	(2,186)	0
Income tax benefit related to dissolution of Aehr Test Systems Japan	(215)	0
Changes in operating assets and liabilities:
Accounts receivable	1,063	1,360
Inventories	(349)	(157)
Prepaid expenses and other assets	(45)	170
Accounts payable	78	(1,033)
Accrued expenses	179	(674)
Customer deposits and deferred revenue	475	(1,315)
Other long-term liabilities	43	0
Income taxes payable	3	19
Net cash used in operating activities	(2,511)	(640)
Cash flows from investing activities:
Purchases of property and equipment	(205)	(151)
Proceeds from sale of property and equipment	0	2
Net cash used in investing activities	(205)	(149)
Cash flows from financing activities:
Proceeds from issuance of common stock under employee plans, net of taxes paid related to share settlement of equity awards	483	423
Line of credit borrowings, net	1,400	0
Net cash provided by financing activities	1,883	423
Effect of exchange rates on cash, cash equivalents and restricted cash	138	(4)
Net decrease in cash, cash equivalents and restricted cash	(695)	(370)
Cash, cash equivalents and restricted cash, beginning of period	5,513	5,508
Cash, cash equivalents and restricted cash, end of period	4,818	5,138
Supplemental disclosure of non-cash flow information:
Transfers of property and equipment to inventories	$ 0	$ 112

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1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

9 Months Ended

Feb. 28, 2021

Accounting Policies [Abstract]

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2020 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2020. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

    The Company (as defined below) has been impacted by the outbreak of the novel coronavirus, known as COVID-19, which has spread throughout the world. Due to the impact of the COVID-19 pandemic on customers and customers’ customers, the Company experienced a drop in customer orders and revenues in the three and nine months ended February 28, 2021. In response, the Company has implemented cost reduction initiatives to mitigate operating losses, including mandatory vacation days, shutdown days, and executive staff pay reductions.

    The Company continues to monitor the situation. As of the date of this report, the Company cannot predict with certainty the potential effects the COVID-19 pandemic may have on the Company’s business and its operating results. While the overall environment remains uncertain, the Company continues to invest in priority areas with the objective of driving profitable growth over the long term.

    PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). On November 18, 2020, the Company established a wholly owned new subsidiary, Aehr Test Systems Philippines, which is in full operation as of March 2021. All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K. (“ATS-Japan”), the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations. As discussed in Note 16, the liquidation of ATS-Japan was completed on July 31, 2020.

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2020. There have been no significant changes in the Company’s significant accounting policies during the three and nine months ended February 28, 2021.

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2. RECENT ACCOUNTING PRONOUNCEMENTS

9 Months Ended

Feb. 28, 2021

Accounting Standards Update and Change in Accounting Principle [Abstract]

2. RECENT ACCOUNTING PRONOUNCEMENTS

2. RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

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3. REVENUE

9 Months Ended

Feb. 28, 2021

Revenue from Contract with Customer [Abstract]

3. REVENUE

3. REVENUE

Revenue recognition

    The Company recognizes revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below.

    Performance obligations include sales of systems, contactors, spare parts, and services, as well as installation and training services included in customer contracts.

    A contract’s transaction price is allocated to each distinct performance obligation. In determining the transaction price, the Company evaluates whether the price is subject to refund or adjustment to determine the net consideration to which the Company expects to be entitled. The Company generally does not grant return privileges, except for defective products during the warranty period.

    For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative standalone selling price basis. Standalone selling prices are based on multiple factors including, but not limited to, historical discounting trends for products and services and pricing practices in different geographies.

    Revenue for systems and spares are recognized at a point in time, which is generally upon shipment or delivery. Revenue from services is recognized over time as services are completed or ratably over the contractual period of generally one year or less.

    The Company has elected the practical expedient to not assess whether a contract has a significant financing component as the Company’s standard payment terms are less than one year.

Disaggregation of revenue

    The following tables show revenues by major product categories. Within each product category, contract terms, conditions and economic factors affecting the nature, amount, timing and uncertainty around revenue recognition and cash flow are substantially similar.

    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Type of good / service:
Systems	$	2,435	$	2,138	$	3,407	$	8,099
Contactors		1,930		3,094		3,330		7,790
Services		902		879		2,225		2,629
	$	5,267	$	6,111	$	8,962	$	18,518
Product lines:
Wafer-level	$	4,993	$	5,408	$	7,804	$	16,570
Test During Burn-In		274		703		1,158		1,948
	$	5,267	$	6,111	$	8,962	$	18,518

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Geographic region:
United States	$	1,113	$	5,014	$	3,124	$	12,698
Asia		4,122		891		5,723		4,758
Europe		32		206		115		1,062
	$	5,267	$	6,111	$	8,962	$	18,518

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at a point in time when control transfers to customers. The following presents revenue based on timing of recognition (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Timing of revenue recognition:
Products and services transferred at a point in time	$	4,944	$	5,485	$	7,728	$	16,666
Services transferred over time		323		626		1,234		1,852
	$	5,267	$	6,111	$	8,962	$	18,518

Contract balances

    A receivable is recognized in the period the Company delivers goods or provides services or when the Company’s right to consideration is unconditional. The Company usually does not record contract assets because the Company has an unconditional right to payment upon satisfaction of the performance obligation, and therefore, a receivable is more commonly recorded than a contract asset.

    Contract liabilities include payments received in advance of performance under a contract and are satisfied as the associated revenue is recognized. Contract liabilities are reported on the Condensed Consolidated Balance Sheets at the end of each reporting period as a component of deferred revenue. Contract liabilities as of February 28, 2021 and May 31, 2020 were $667,000 and $192,000, respectively. During the three and nine months ended February 28, 2021, the Company recognized $29,000 and $154,000 respectively, of revenues that were included in contract liabilities as of May 31, 2020.

Remaining performance obligations

    On February 28, 2021, the Company had $129,000 of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts not yet delivered. The Company expects to recognize approximately $49,000 within one year from the balance sheet date and $80,000 thereafter. The foregoing excludes the value of other remaining performance obligations as they have original durations of one year or less, and also excludes information about variable consideration allocated entirely to a wholly unsatisfied performance obligation.

Costs to obtain or fulfill a contract

    The Company generally expenses sales commissions when incurred as a component of selling, general and administrative expense as the amortization period is typically less than one year. Additionally, the majority of the Company’s cost of fulfillment as a manufacturer of products is classified as inventory and fixed assets, which are accounted for under the respective guidance for those asset types. Other costs of contract fulfillment are immaterial due to the nature of the Company’s products and their respective manufacturing process.

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4. EARNINGS PER SHARE

9 Months Ended

Feb. 28, 2021

Net (loss) income per share:

4. EARNINGS PER SHARE

4. EARNINGS PER SHARE

    Basic earnings per share is determined using the weighted average number of common shares outstanding during the period. Diluted earnings per share is determined using the weighted average number of common shares and potential common shares (representing the dilutive effect of stock options, restricted stock units (“RSUs”), and Amended and Restated 2006 Employee Stock Purchase Plan (“ESPP”) shares) outstanding during the period using the treasury stock method.

    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Numerator: Net (loss) income	$	(735)	$	245	$	(2,594)	$	83
Denominator for basic net (loss) income per share:
Weighted average shares outstanding		23,525		22,937		23,390		22,823
Shares used in basic net (loss) income per share calculation		23,525		22,937		23,390		22,823
Effect of dilutive securities		—		193		—		117
Denominator for diluted net (loss) income per share		23,525		23,130		23,390		22,940
Basic net (loss) income per share	$	(0.03)	$	0.01	$	(0.11)	$	0.00
Diluted net (loss) income per share	$	(0.03)	$	0.01	$	(0.11)	$	0.00

   For the purpose of computing diluted earnings per share, the weighted average number of potential common shares does not include stock options with an exercise price greater than the average fair value of the Company’s common stock for the period, as the effect would be anti-dilutive. In the three and nine months ended February 28, 2021 potential common shares have not been included in the calculation of diluted net loss per share as the effect would be anti-dilutive. As such, the numerator and the denominator used in computing both basic and diluted net loss per share for these periods are the same. Stock options to purchase 2,804,000 shares of common stock, RSUs for 143,000 shares and ESPP rights to purchase 139,000 ESPP shares were outstanding as of February 28, 2021, but were not included in the computation of diluted net loss per share, because the inclusion of such shares would be anti-dilutive. Stock options to purchase 2,505,000 shares of common stock were outstanding as of February 29, 2020 but were not included in the computation of diluted net income per share, because the inclusion of such shares would be anti-dilutive.

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS

9 Months Ended

Feb. 28, 2021

Fair Value Disclosures [Abstract]

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

5. FAIR VALUE OF FINANCIAL INSTRUMENTS

    The Company’s financial instruments are measured at fair value consistent with authoritative guidance. This authoritative guidance defines fair value, establishes a framework for using fair value to measure assets and liabilities, and disclosures required related to fair value measurements.

    The guidance establishes a fair value hierarchy based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources while unobservable inputs reflect a reporting entity’s pricing based upon their own market assumptions. The fair value hierarchy consists of the following three levels:

Level 1 - instrument valuations are obtained from real-time quotes for transactions in active exchange markets involving identical assets.

Level 2 - instrument valuations are obtained from readily-available pricing sources for comparable instruments.

Level 3 - instrument valuations are obtained without observable market values and require a high level of judgment to determine the fair value.

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of February 28, 2021 (in thousands):

	Balance as of
	February 28, 2021		Level 1		Level 2		Level 3
Money market funds	$	80	$	80	$	—	$	—
Assets	$	80	$	80	$	—	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2020 (in thousands):

	Balance as of May 31, 2020		Level 1		Level 2		Level 3
Money market funds	$	80	$	80	$	—	$	—
Assets	$	80	$	80	$	—	$	—

    Included in money market funds as of February 28, 2021 and May 31, 2020 is $80,000 restricted cash representing a security deposit for the Company’s United States manufacturing and office space lease which is included in other assets in the consolidated balance sheets.

    There were no financial liabilities measured at fair value as of February 28, 2021 and May 31, 2020.

    There were no transfers between Level 1 and Level 2 fair value measurements during the three and nine months ended February 28, 2021.

    The carrying amounts of financial instruments including cash, cash equivalents, receivables, accounts payable and certain other accrued liabilities, approximate fair value due to their short maturities.

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6. ACCOUNTS RECEIVABLE, NET

9 Months Ended

Feb. 28, 2021

Receivables [Abstract]

6. ACCOUNTS RECEIVABLE, NET

6. ACCOUNTS RECEIVABLE, NET

    Accounts receivable represent customer trade receivables. As of February 28, 2021 and May 31, 2020, there were no allowances for doubtful accounts. Accounts receivable are derived from the sale of products throughout the world to semiconductor manufacturers, semiconductor contract assemblers, electronics manufacturers and burn-in and test service companies. The Company’s allowance for doubtful accounts is based upon historical experience and review of trade receivables by aging category to identify specific customers with known disputes or collection issues. Uncollectible receivables are recorded as bad debt expense when all efforts to collect have been exhausted and recoveries are recognized when they are received.

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7. INVENTORIES

9 Months Ended

Feb. 28, 2021

Inventory Disclosure [Abstract]

7. INVENTORIES

7. INVENTORIES

    Inventories are comprised of the following (in thousands):

	February 28,		May 31,
	2021		2020
Raw materials and sub-assemblies	$	5,626	$	5,055
Work in process		2,713		2,917
Finished goods		—		17
	$	8,339	$	7,989

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8. PRODUCT WARRANTIES

9 Months Ended

Feb. 28, 2021

Product Warranties Disclosures [Abstract]

8. PRODUCT WARRANTIES

8. PRODUCT WARRANTIES

    The Company provides for the estimated cost of product warranties at the time revenues are recognized on the products shipped. While the Company engages in extensive product quality programs and processes, including actively monitoring and evaluating the quality of its component suppliers, the Company’s warranty obligation is affected by product failure rates, material usage and service delivery costs incurred in correcting a product failure. Should actual product failure rates, material usage or service delivery costs differ from the Company’s estimates, revisions to the estimated warranty liability would be required.

    The standard warranty period is one year for systems and ninety days for parts and service.

    The following is a summary of changes in the Company's liability for product warranties during the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended						Nine Months Ended
	February 28,			February 29,			February 28,			February 29,
	2021			2020			2021			2020
Balance at the beginning of the period	$	244		$	190		$	246		$	154
Accruals for warranties issued during the period		78			26			270			167
Adjustments to previously existing warranty accruals		259			—			346			—
Consumption of reserves		(81	)		(30	)		(362	)		(135	)
Balance at the end of the period	$	500		$	186		$	500		$	186

    The accrued warranty balance is included in accrued expenses on the accompanying condensed consolidated balance sheets.

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

9 Months Ended

Feb. 28, 2021

Customer Deposits And Deferred Revenue Short-term

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM

    Customer deposits and deferred revenue, short-term (in thousands):

	February 28,		May 31,
	2021		2020
Customer deposits	$	471	$	—
Deferred revenue		116		170
	$	587	$	170

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10. INCOME TAXES

9 Months Ended

Feb. 28, 2021

Income Tax Disclosure [Abstract]

10. INCOME TAXES

10. INCOME TAXES

    Income taxes have been provided using the liability method whereby deferred tax assets and liabilities are determined based on differences between financial reporting and tax bases of assets and liabilities and net operating loss and tax credit carryforwards measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse or the carryforwards are utilized. Valuation allowances are established when it is determined that it is more likely than not that such assets will not be realized.

    Since fiscal 2009, a full valuation allowance was established against all deferred tax assets, as management determined that it is more likely than not that certain deferred tax assets will not be realized.

    The Company accounts for uncertain tax positions consistent with authoritative guidance. The guidance prescribes a “more likely than not” recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. The Company does not expect any material change in its unrecognized tax benefits over the next twelve months. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income taxes.

    On March 27, 2020, the “Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was passed into law. The CARES Act includes several significant business tax provisions including modification to the taxable income limitation for utilization of net operating losses (“NOLs”) incurred in 2018, 2019 and 2020 and the ability to carry back NOLs from those years for a period of up to five years, an increase to the limitation on deductibility of certain business interest expense, bonus depreciation for purchases of qualified improvement property and special deductions on certain corporate charitable contributions. The Company is currently analyzing the impact of these changes and therefore an estimate of the impact to income taxes is not yet available.

    On June 29, 2020, Assembly Bill 85 (AB 85) was signed into law as part of the California 2020 Budget Act, which temporarily suspends the use of California net operating losses and imposes a cap on the amount of business incentive tax credits that companies can utilize against their net income for tax years 2020, 2021, and 2022. The Company analyzed the provisions of AB 85 and determined there was no impact on its provision for income taxes for the current period and will continue to evaluate the impact, if any, AB 85 may have on the Company’s condensed consolidated financial statements and disclosures.

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11. LEASES

9 Months Ended

Feb. 28, 2021

Leases [Abstract]

11. LEASES

11. LEASES

    The Company has only operating leases for real estate including corporate offices, warehouse space and certain equipment. A lease with an initial term of 12 months or less is generally not recorded on the condensed consolidated balance sheet, unless the arrangement includes an option to purchase the underlying asset, or renew the arrangement that the Company is reasonably certain to exercise (short-term leases). The Company recognizes lease expense on a straight-line basis over the lease term for short-term leases that the Company does not record on its balance sheet. The Company’s operating leases have remaining lease terms of 1 month to 5 years.

    The Company determines whether an arrangement is or contains a lease based on the unique facts and circumstances present at the inception of the arrangement. Operating lease liabilities and their corresponding right-of-use assets are recorded based on the present value of lease payments over the expected lease term. The interest rate implicit in lease contracts is typically not readily determinable.

    As such, the Company utilizes the appropriate incremental borrowing rate, which is the rate incurred to borrow on a collateralized basis over a similar term at an amount equal to the lease payments in a similar economic environment. Certain adjustments to the right-of-use asset may be required for items such as initial direct costs paid or incentives received.

    The weighted-average remaining lease term for the Company’s operating leases was 2.6 years at February 28, 2021 and the weighted-average discount rate was 5.4%.

    The Company’s operating lease cost was $193,000 and $568,000 for the three and nine months ended February 28, 2021, respectively. For the three and nine months ended February 29, 2020, operating lease cost was $183,000 and $548,000, respectively.

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Nine Months Ended
	February 28, 2021		February 29, 2020
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$	579	$	550

    The following table presents the maturities of the Company’s operating lease liabilities as of February 28, 2021 (in thousands): 

Fiscal year	Operating Leases
2021 (excluding the first nine months of 2021)	$	199
2022		810
2023		826
2024		164
2025		31
Thereafter		19
Total future minimum operating lease payments	$	2,049
Less: imputed interest		(142	)
Present value of operating lease liabilities	$	1,907

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12. BORROWING AND FINANCING ARRANGEMENTS

9 Months Ended

Feb. 28, 2021

Debt Disclosure [Abstract]

12. BORROWING AND FINANCING ARRANGEMENTS

12. BORROWING AND FINANCING ARRANGEMENTS

    On January 16, 2020, the Company entered into a Loan and Security Agreement (the “Loan Agreement”) with Silicon Valley Bank (“SVB”). Pursuant to the Loan Agreement, the Company may borrow up to (a) the lesser of (i) the revolving line of $4.0 million or (ii) the amount available under the borrowing base minus (b) the outstanding principal balance of any advances, under a revolving line of credit which is collateralized by all the Company’s assets except intellectual property. The borrowing base is 80% of eligible accounts, as determined by SVB from the Company’s most recent borrowing base statement; provided, however, SVB has the right to decrease the foregoing percentage in its good faith business judgment to mitigate the impact of certain events or conditions, which may adversely affect the collateral or its value. Subject to an event of default, the principal amount outstanding under the revolving line of credit will accrue interest at a floating per annum rate equal to the greater of (a) the prime rate plus an additional percentage of up to 1%, which additional percentage depends on the Company’s adjusted quick ratio, and (b) 4.75%. Interest is payable monthly on the last calendar day of each month and the outstanding principal amount, the unpaid interest and all other obligations are due on the maturity date, which is 364 days from the effective date of January 13, 2020.

    On January 14, 2021, the Company entered into the First Amendment to Loan and Security Agreement (the “Amendment”) with Silicon Valley Bank. The Amendment, among other things, extends the Revolving Line Maturity Date to July 14, 2021; provided, however, that if the Company achieves specified operating metrics on a consolidated basis on or prior to May 31, 2021 the Amended Revolving Line Maturity Date is extended to January 13, 2022.

    At February 28, 2021, the Company had drawn $1,400,000 against the credit facility and was in compliance with all covenants related to obligations to meet reporting requirements. The balance available to borrow under the line at February 28, 2021 was $349,000. There are no financial covenants in the agreement.

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13. LONG-TERM DEBT

9 Months Ended

Feb. 28, 2021

Long-term Debt, Unclassified [Abstract]

13. LONG-TERM DEBT

13. LONG-TERM DEBT:

    On April 23, 2020, the Company obtained a Paycheck Protection Program Loan (the “PPP Loan”) in the aggregate amount of $1,679,000 from SVB. The PPP Loan was evidenced by a promissory note dated April 23, 2020 (the “Note”) that matures on April 23, 2022 and bears interest at a rate of 1% per annum. The PPP Loan proceeds were used for payroll, health care benefits, rent and utilities.

    Under the terms of the CARES Act, PPP loan recipients can apply for and be granted forgiveness for all or a portion of loans granted under the PPP. Such forgiveness will be determined, subject to limitations, based on the use of loan proceeds for payment of payroll costs, covered rent and mortgage obligations, and covered utility payments incurred by the Company. The Company applied on November 6, 2020 for loan forgiveness for the full amount of the borrowing and accrued interest. While the Small Business Administration has not yet reviewed and approved the application, going beyond 90 days after submission, the Company believes the expenses met the criteria for forgiveness. However, no assurance can be given that the Company will obtain forgiveness of the amount due under the loan in whole or in part.

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14. STOCK-BASED COMPENSATION

9 Months Ended

Feb. 28, 2021

Share-based Payment Arrangement [Abstract]

14. STOCK-BASED COMPENSATION

14. STOCK-BASED COMPENSATION

    Stock-based compensation expense consists of expenses for stock options, RSUs, and ESPP purchase rights. Stock-based compensation expense for stock options and ESPP purchase rights is measured at each grant date, based on the fair value of the award using the Black-Scholes option valuation model, and is recognized as expense over the employee’s requisite service period. This model was developed for use in estimating the value of publicly traded options that have no vesting restrictions and are fully transferable. The Company’s employee stock options have characteristics significantly different from those of publicly traded options. For RSUs, stock-based compensation cost is based on the fair value of the Company’s common stock at the grant date. All of the Company’s stock-based compensation is accounted for as an equity instrument. See Note 11 in the Company’s Annual Report on Form 10-K for fiscal 2020 filed on August 28, 2020 for further information regarding the 2016 Equity Incentive Plan (the “2016 Plan”) and the ESPP.

    The following table summarizes the stock-based compensation expense for the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$	14	$	19	$	45	$	58
Selling, general and administrative		194		137		593		401
Research and development		63		51		160		152
Total stock-based compensation	$	271	$	207	$	798	$	611

    As of February 28, 2021 and February 29, 2020, there were no stock-based compensation expenses capitalized as part of inventory.

    During the three months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to stock options and RSUs under the 2016 Plan of $253,000 and $166,000, respectively. During the nine months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to stock options and RSUs of $736,000 and $480,000, respectively.

    As of February 28, 2021, the total compensation expense related to unvested stock-based awards under the 2016 Plan, but not yet recognized, was approximately $1,151,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 2.6 years.

    During the three months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to the ESPP of $18,000 and $41,000, respectively. During the nine months ended February 28, 2021 and February 29, 2020, the Company recorded stock-based compensation expense related to the ESPP of $62,000 and $131,000, respectively.

    As of February 28, 2021, the total compensation expense related to purchase rights under the ESPP but not yet recognized was approximately $29,000. This expense will be amortized on a straight-line basis over a weighted average period of approximately 1.0 years.

Valuation Assumptions

    Valuation and Amortization Method. The Company estimates the fair value of stock options granted using the Black-Scholes option valuation model and a single option award approach. The fair value under the single option approach is amortized on a straight-line basis over the requisite service periods of the awards, which is generally the vesting period.

    Expected Term. The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was determined based on historical experience, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as evidenced by changes to the terms of its stock-based awards.

    Volatility. Volatility is a measure of the amounts by which a financial variable such as stock price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period. The Company uses the historical volatility for the past four or five years based on weighted average of the expected term of option grants, to estimate expected volatility. Volatility for each of the ESPP’s four time periods of six months, twelve months, eighteen months, and twenty-four months is calculated separately and included in the overall stock-based compensation expense recorded.

    Risk-Free Interest Rate. The Company bases the risk-free interest rate used in the Black-Scholes option valuation model on the implied yield in effect at the time of option grant on U.S. Treasury zero-coupon issues with a remaining term equivalent to the expected term of the stock awards including the ESPP.

    Fair Value. The fair values of the Company’s stock options granted to employees for the three and nine months ended February 28, 2021 and February 29, 2020, were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended			Nine Months Ended
	February 29,			February 28,			February 29,
	2020			2021			2020
Expected term (in years)		5			6			5
Volatility		0.72			0.72			0.71
Risk-free interest rate		1.57	%		0.39	%		1.85	%
Weighted average grant date fair value	$	1.37		$	1.09		$	0.98

    There were no stock options granted during the three months ended February 28, 2021.

    The fair values of the ESPP purchase rights granted for the nine months ended February 28, 2021 and February 29, 2020 were estimated using the following assumptions:

	Nine Months Ended
	February 28,			February 29,
	2021			2020
Expected term (in years)		0.5-2.0			0.5-2.0
Volatility		0.74-0.82			0.62-0.71
Expected dividend	$	0.00		$	0.00
Risk-free interest rate		0.10%-0.14	%		1.56%-1.81	%
Weighted average grant date fair value	$	0.44		$	0.80

    There were no ESPP purchase rights granted to employees for the three months ended February 28, 2021 and February 29, 2020. During the nine months ended February 28, 2021 and February 29, 2020, ESPP purchase rights of 81,000 and 38,000 were granted, respectively. Total ESPP shares issued during the nine months ended February 28, 2021 and February 29, 2020 were 72,000 and 71,000 shares, respectively. As of February 28, 2021, there were 511,000 ESPP shares available for issuance. As of February 29, 2020, there were 299,000 ESPP shares available for issuance.

    The following tables summarize the Company’s stock option and RSU transactions during three and nine months ended February 28, 2021 (in thousands):

	Available
	Shares
Balance, May 31, 2020		1,650
Options granted		(200	)
RSUs granted		(196	)
Options cancelled		188
RSUs cancelled		2
Options expired		(125	)
Balance, August 31, 2020		1,319
Options granted		(73	)
RSUs granted		(57	)
Options cancelled		185
Options expired		(162	)
Balance, November 30, 2020		1,212
RSUs granted		(42	)
Shares withheld for taxes and not issued		4
Options cancelled		21
Balance, February 28, 2021		1,195

    The following table summarizes the stock option transactions during the three and nine months ended February 28, 2021 (in thousands, except per share data):

	Outstanding Options
				Weighted
	Number			Average		Aggregate
	of			Exercise		Intrinsic
	Shares			Price		Value
Balances, May 31, 2020	3,153		$	2.17	$	102
Options granted	200		$	1.86
Options cancelled	(188	)	$	2.18
Options exercised	(148	)	$	1.30
Balances, August 31, 2020	3,017		$	2.19	$	148
Options granted	73		$	1.44
Options cancelled	(185	)	$	2.42
Options exercised	(19	)	$	1.67
Balances, November 30, 2020	2,886		$	2.16	$	56
Options cancelled	(21	)	$	1.86
Options exercised	(61	)	$	2.07
Balances, February 28, 2021	2,804		$	2.16	$	1,994
Options fully vested and expected to vest at February 28, 2021	2,769		$	2.17	$	1,967

    The options outstanding and exercisable at February 28, 2021 were in the following exercise price ranges (in thousands, except per share data):

			Options Outstanding						Options Exercisable
			at February 28, 2021						at February 28, 2021
Range of Exercise Prices			Number Outstanding Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
	$	1.22-$1.34		133		6.30	$	1.27		36		6.36	$	1.28
	$	1.64-$1.86		1,047		5.04	$	1.70		589		4.50	$	1.69
	$	2.03-$2.46		1,017		3.25	$	2.21		781		2.86	$	2.19
	$	2.63-$2.81		405		0.66	$	2.71		404		0.65	$	2.71
	$	3.46-$3.93		202		3.41	$	3.86		184		3.41	$	3.85
	$	1.22-$3.93		2,804		3.70	$	2.16		1,994		3.01	$	2.28	$	1,224

    The total intrinsic value of options exercised during the three and nine months ended February 28, 2021 was $57,000 and $151,000, respectively. The total intrinsic value of options exercised during the three and nine months ended February 29, 2020 was $92,000 and $159,000, respectively. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at February 28, 2021 was 3.68 years. The weighted average remaining contractual life of the options exercisable and expected to be exercisable at February 29, 2020 was 3.78 years.

    During the three months ended February 28, 2021, RSUs for 4,000 shares, net of 4,000 shares withheld to settle payroll taxes, were granted and fully vested to employees. The market value on the date of the grant of these RSUs was $2.25 per share. During the nine months ended February 28, 2021, RSUs for 165,000 shares, net of 4,000 shares withheld to settle payroll taxes, were granted to employees. The weighted average market value on the date of the grant of these RSUs was $1.87 per share. During the three and nine months ended February 28, 2021, 19,000 and 34,000 RSUs became fully vested, respectively. As of February 28, 2021, 143,000 RSUs remain unvested which had an intrinsic value of $400,000. There were no RSUs granted to employees during the three and nine months ended February 29, 2020. During the three and nine months ended February 29, 2020, 3,000 and 10,000 RSUs became fully vested, respectively. As of February 29, 2020, 13,000 RSUs remain unvested which had an intrinsic value of $27,000.

    During the three months ended February 28, 2021, RSUs for 34,000 shares were granted to members of the Company’s Board of Directors for Board fees. The market value on the date of the grant of these RSUs was $2.25 per share. During the nine months ended February 28, 2021, RSUs for 126,000 shares were granted to members of the Company’s Board of Directors for Board fees. The weighted average market value on the date of the grant of these RSUs was $1.73 per share. All of these RSUs were immediately fully vested. There were no RSUs granted to members of the Company’s Board of Directors during the three and nine months ended February 29, 2020.

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15. SEGMENT INFORMATION

9 Months Ended

Feb. 28, 2021

Segment Reporting [Abstract]

15. SEGMENT INFORMATION

15. SEGMENT INFORMATION

    The Company has only one reportable segment. The information for revenue category by type, product line, geography and timing of revenue recognition, is summarized in Note “3. REVENUE.”

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	February 28,		May 31,
	2021		2020
United States	$	612	$	662
Asia		5		1
Europe		—		—
	$	617	$	663

    As of February 28, 2021, the operating lease right-of-use assets of $1,763,000 were allocated in the United States.

    There were no revenues through distributors for the three and nine months ended February 28, 2021 and February 29, 2020.

    Sales to the Company’s five largest customers accounted for approximately 95% and 82% of its net sales in the three and nine months ended February 28, 2021, respectively. Four customers accounted for approximately 55%,15%, 11% and 11% of the Company’s net sales in the three months ended February 28, 2021. Four customers accounted for approximately 33%,15%, 14% and 11% of the Company’s net sales in the nine months ended February 28, 2021. Sales to the Company’s five largest customers accounted for approximately 94% and 89% of its net sales in the three and nine months ended February 29, 2020, respectively. One customer accounted for approximately 71% of the Company’s net sales in the three months ended February 29, 2020. Two customers accounted for approximately 51% and 18% of the Company’s net sales in the nine months ended February 29, 2020. No other customers represented more than 10% of the Company’s net sales in the three and nine months ended February 28, 2021 and February 29, 2020.

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16. DISSOLUTION OF AEHR TEST SYSTEMS JAPAN

9 Months Ended

Feb. 28, 2021

Dissolution of Aehr Test Systems Japan

16. DISSOLUTION OF AEHR TEST SYSTEMS JAPAN

16. DISSOLUTION OF AEHR TEST SYSTEMS JAPAN

    On July 31, 2020, the Company completed the liquidation of ATS-Japan, a majority owned subsidiary. Accordingly, the Company deconsolidated ATS-Japan and recognized an aggregate net gain of $2,401,000 for the period ended August 31, 2020. The net gain was mainly due to cumulative translation adjustment reclassified into earnings of $2,186,000 and the residual income tax effect in connection with the cumulative translation adjustment released into income tax benefits of $215,000.

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1. BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Feb. 28, 2021

Accounting Policies [Abstract]

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCCOUNTING POLICIES

    The accompanying financial information has been prepared by Aehr Test Systems, without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations.

    In the opinion of management, the unaudited condensed consolidated financial statements for the interim periods presented have been prepared on a basis consistent with the May 31, 2020 audited consolidated financial statements and reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the condensed consolidated financial position and results of operations as of and for such periods indicated. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the fiscal year ended May 31, 2020. Results for the interim periods presented herein are not necessarily indicative of results which may be reported for any other interim period or for the entire fiscal year.

    The Company (as defined below) has been impacted by the outbreak of the novel coronavirus, known as COVID-19, which has spread throughout the world. Due to the impact of the COVID-19 pandemic on customers and customers’ customers, the Company experienced a drop in customer orders and revenues in the three and nine months ended February 28, 2021. In response, the Company has implemented cost reduction initiatives to mitigate operating losses, including mandatory vacation days, shutdown days, and executive staff pay reductions.

    The Company continues to monitor the situation. As of the date of this report, the Company cannot predict with certainty the potential effects the COVID-19 pandemic may have on the Company’s business and its operating results. While the overall environment remains uncertain, the Company continues to invest in priority areas with the objective of driving profitable growth over the long term.

PRINCIPLES OF CONSOLIDATION

PRINCIPLES OF CONSOLIDATION. The condensed consolidated financial statements include the accounts of Aehr Test Systems and its subsidiaries (collectively, the "Company"). On November 18, 2020, the Company established a wholly owned new subsidiary, Aehr Test Systems Philippines, which is in full operation as of March 2021. All significant intercompany balances have been eliminated in consolidation. For the Company’s majority owned subsidiary, Aehr Test Systems Japan K.K. (“ATS-Japan”), the noncontrolling interest of the portion the Company does not own was reflected on the Condensed Consolidated Balance Sheets in Shareholders’ Equity and in the Condensed Consolidated Statements of Operations. As discussed in Note 16, the liquidation of ATS-Japan was completed on July 31, 2020.

ACCOUNTING ESTIMATES

    ACCOUNTING ESTIMATES. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Estimates are used to account for sales and revenue allowances, the allowance for doubtful accounts, inventory valuations, income taxes, stock-based compensation expenses, and product warranties, among others. The Company bases its estimates on historical experience and on various other assumptions that it believes to be reasonable under the circumstances. Actual results could differ materially from those estimates.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES. The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2020. There have been no significant changes in the Company’s significant accounting policies during the three and nine months ended February 28, 2021.

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2. RECENT ACCOUNTING PRONOUNCEMENTS (Policies)

9 Months Ended

Feb. 28, 2021

Accounting Standards Update and Change in Accounting Principle [Abstract]

RECENT ACCOUNTING PRONOUNCEMENTS

RECENT ACCOUNTING PRONOUNCEMENTS

Accounting Standards Not Yet Adopted

    Financial Instruments

    In June 2016, the FASB issued an accounting standard update (“ASU”) that requires measurement and recognition of expected credit losses for financial assets held based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the reported amount. Due to a subsequent ASU in November 2019, the accounting standard will be effective for the Company beginning in the first quarter of fiscal 2024 on a modified retrospective basis, and early adoption is permitted. The Company does not expect a material impact of this accounting standard on its consolidated financial statements.

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3. REVENUE (Tables)

9 Months Ended

Feb. 28, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of revenue

    The Company’s revenues by product category are as follows (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Type of good / service:
Systems	$	2,435	$	2,138	$	3,407	$	8,099
Contactors		1,930		3,094		3,330		7,790
Services		902		879		2,225		2,629
	$	5,267	$	6,111	$	8,962	$	18,518
Product lines:
Wafer-level	$	4,993	$	5,408	$	7,804	$	16,570
Test During Burn-In		274		703		1,158		1,948
	$	5,267	$	6,111	$	8,962	$	18,518

    The following presents information about the Company’s operations in different geographic areas. Net sales are based upon ship-to location (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Geographic region:
United States	$	1,113	$	5,014	$	3,124	$	12,698
Asia		4,122		891		5,723		4,758
Europe		32		206		115		1,062
	$	5,267	$	6,111	$	8,962	$	18,518

    With the exception of the amount of service contracts and extended warranties, the Company’s product category revenues are recognized at a point in time when control transfers to customers. The following presents revenue based on timing of recognition (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Timing of revenue recognition:
Products and services transferred at a point in time	$	4,944	$	5,485	$	7,728	$	16,666
Services transferred over time		323		626		1,234		1,852
	$	5,267	$	6,111	$	8,962	$	18,518

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4. EARNINGS PER SHARE (Tables)

9 Months Ended

Feb. 28, 2021

Net (loss) income per share:

Earnings per share

    The following table presents the computation of basic and diluted net (loss) income per share attributable to Aehr Test Systems common shareholders (in thousands, except per share data):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Numerator: Net (loss) income	$	(735)	$	245	$	(2,594)	$	83
Denominator for basic net (loss) income per share:
Weighted average shares outstanding		23,525		22,937		23,390		22,823
Shares used in basic net (loss) income per share calculation		23,525		22,937		23,390		22,823
Effect of dilutive securities		—		193		—		117
Denominator for diluted net (loss) income per share		23,525		23,130		23,390		22,940
Basic net (loss) income per share	$	(0.03)	$	0.01	$	(0.11)	$	0.00
Diluted net (loss) income per share	$	(0.03)	$	0.01	$	(0.11)	$	0.00

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Feb. 28, 2021

Fair Value Disclosures [Abstract]

Fair value by hierarchy

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of February 28, 2021 (in thousands):

	Balance as of
	February 28, 2021		Level 1		Level 2		Level 3
Money market funds	$	80	$	80	$	—	$	—
Assets	$	80	$	80	$	—	$	—

    The following table summarizes the Company’s financial assets measured at fair value on a recurring basis as of May 31, 2020 (in thousands):

	Balance as of May 31, 2020		Level 1		Level 2		Level 3
Money market funds	$	80	$	80	$	—	$	—
Assets	$	80	$	80	$	—	$	—

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7. INVENTORIES (Tables)

9 Months Ended

Feb. 28, 2021

Inventory Disclosure [Abstract]

Inventories

    Inventories are comprised of the following (in thousands):

	February 28,		May 31,
	2021		2020
Raw materials and sub-assemblies	$	5,626	$	5,055
Work in process		2,713		2,917
Finished goods		—		17
	$	8,339	$	7,989

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8. PRODUCT WARRANTIES (Tables)

9 Months Ended

Feb. 28, 2021

Product Warranties Disclosures [Abstract]

Liability for product warranties

    The following is a summary of changes in the Company's liability for product warranties during the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended						Nine Months Ended
	February 28,			February 29,			February 28,			February 29,
	2021			2020			2021			2020
Balance at the beginning of the period	$	244		$	190		$	246		$	154
Accruals for warranties issued during the period		78			26			270			167
Adjustments to previously existing warranty accruals		259			—			346			—
Consumption of reserves		(81	)		(30	)		(362	)		(135	)
Balance at the end of the period	$	500		$	186		$	500		$	186

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Tables)

9 Months Ended

Feb. 28, 2021

Customer Deposits And Deferred Revenue Short-term

Customer deposits and deferred revenue

    Customer deposits and deferred revenue, short-term (in thousands):

	February 28,		May 31,
	2021		2020
Customer deposits	$	471	$	—
Deferred revenue		116		170
	$	587	$	170

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11. LEASES (Tables)

9 Months Ended

Feb. 28, 2021

Leases [Abstract]

Supplemental cash flow information related to leases

    The following table presents supplemental cash flow information related to the Company’s operating leases (in thousands):

	Nine Months Ended
	February 28, 2021		February 29, 2020
Cash paid for amounts included in the measurement of operating lease liabilities
Operating cash flows from operating leases	$	579	$	550

Maturity of operating lease liabilities

    The following table presents the maturities of the Company’s operating lease liabilities as of February 28, 2021 (in thousands): 

Fiscal year	Operating Leases
2021 (excluding the first nine months of 2021)	$	199
2022		810
2023		826
2024		164
2025		31
Thereafter		19
Total future minimum operating lease payments	$	2,049
Less: imputed interest		(142	)
Present value of operating lease liabilities	$	1,907

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14. STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Feb. 28, 2021

Share-based Payment Arrangement [Abstract]

Compensation costs related to the Company's stock-based compensation

    The following table summarizes the stock-based compensation expense for the three and nine months ended February 28, 2021 and February 29, 2020 (in thousands):

	Three Months Ended				Nine Months Ended
	February 28,		February 29,		February 28,		February 29,
	2021		2020		2021		2020
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Cost of sales	$	14	$	19	$	45	$	58
Selling, general and administrative		194		137		593		401
Research and development		63		51		160		152
Total stock-based compensation	$	271	$	207	$	798	$	611

Fair value assumptions for option valuation model

    Fair Value. The fair values of the Company’s stock options granted to employees for the three and nine months ended February 28, 2021 and February 29, 2020, were estimated using the following weighted average assumptions in the Black-Scholes option valuation model:

	Three Months Ended			Nine Months Ended
	February 29,			February 28,			February 29,
	2020			2021			2020
Expected term (in years)		5			6			5
Volatility		0.72			0.72			0.71
Risk-free interest rate		1.57	%		0.39	%		1.85	%
Weighted average grant date fair value	$	1.37		$	1.09		$	0.98

Fair value assumption of the ESPP Purchase Rights

    The fair values of the ESPP purchase rights granted for the nine months ended February 28, 2021 and February 29, 2020 were estimated using the following assumptions:

	Nine Months Ended
	February 28,			February 29,
	2021			2020
Expected term (in years)		0.5-2.0			0.5-2.0
Volatility		0.74-0.82			0.62-0.71
Expected dividend	$	0.00		$	0.00
Risk-free interest rate		0.10%-0.14	%		1.56%-1.81	%
Weighted average grant date fair value	$	0.44		$	0.80

Stock option and RSU transactions

    The following tables summarize the Company’s stock option and RSU transactions during three and nine months ended February 28, 2021 (in thousands):

	Available
	Shares
Balance, May 31, 2020		1,650
Options granted		(200	)
RSUs granted		(196	)
Options cancelled		188
RSUs cancelled		2
Options expired		(125	)
Balance, August 31, 2020		1,319
Options granted		(73	)
RSUs granted		(57	)
Options cancelled		185
Options expired		(162	)
Balance, November 30, 2020		1,212
RSUs granted		(42	)
Shares withheld for taxes and not issued		4
Options cancelled		21
Balance, February 28, 2021		1,195

Stock option transactions

    The following table summarizes the stock option transactions during the three and nine months ended February 28, 2021 (in thousands, except per share data):

	Outstanding Options
				Weighted
	Number			Average		Aggregate
	of			Exercise		Intrinsic
	Shares			Price		Value
Balances, May 31, 2020	3,153		$	2.17	$	102
Options granted	200		$	1.86
Options cancelled	(188	)	$	2.18
Options exercised	(148	)	$	1.30
Balances, August 31, 2020	3,017		$	2.19	$	148
Options granted	73		$	1.44
Options cancelled	(185	)	$	2.42
Options exercised	(19	)	$	1.67
Balances, November 30, 2020	2,886		$	2.16	$	56
Options cancelled	(21	)	$	1.86
Options exercised	(61	)	$	2.07
Balances, February 28, 2021	2,804		$	2.16	$	1,994
Options fully vested and expected to vest at February 28, 2021	2,769		$	2.17	$	1,967

Options outstanding

    The options outstanding and exercisable at February 28, 2021 were in the following exercise price ranges (in thousands, except per share data):

			Options Outstanding						Options Exercisable
			at February 28, 2021						at February 28, 2021
Range of Exercise Prices			Number Outstanding Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Number Exercisable Shares		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
	$	1.22-$1.34		133		6.30	$	1.27		36		6.36	$	1.28
	$	1.64-$1.86		1,047		5.04	$	1.70		589		4.50	$	1.69
	$	2.03-$2.46		1,017		3.25	$	2.21		781		2.86	$	2.19
	$	2.63-$2.81		405		0.66	$	2.71		404		0.65	$	2.71
	$	3.46-$3.93		202		3.41	$	3.86		184		3.41	$	3.85
	$	1.22-$3.93		2,804		3.70	$	2.16		1,994		3.01	$	2.28	$	1,224

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15. SEGMENT INFORMATION (Tables)

9 Months Ended

Feb. 28, 2021

Segment Reporting [Abstract]

Property and equipment by geographic region

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

	February 28,		May 31,
	2021		2020
United States	$	612	$	662
Asia		5		1
Europe		—		—
	$	617	$	663

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3. REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Net sales	$ 5,267	$ 6,111	$ 8,962	$ 18,518
Systems
Net sales	2,435	2,138	3,407	8,099
Contactors
Net sales	1,930	3,094	3,330	7,790
Services
Net sales	902	879	2,225	2,629
Wafer-level
Net sales	4,993	5,408	7,804	16,570
Test During Burn-In
Net sales	$ 274	$ 703	$ 1,158	$ 1,948

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3. REVENUE (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Net sales	$ 5,267	$ 6,111	$ 8,962	$ 18,518
United States
Net sales	1,113	5,014	3,124	12,698
Asia
Net sales	4,122	891	5,723	4,758
Europe
Net sales	$ 32	$ 206	$ 115	$ 1,062

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3. REVENUE (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Net sales	$ 5,267	$ 6,111	$ 8,962	$ 18,518
Products and Services Transferred at a Point in Time
Net sales	4,944	5,485	7,728	16,666
Services Transferred Over Time
Net sales	$ 323	$ 626	$ 1,234	$ 1,852

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3. REVENUE (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Feb. 28, 2021	Feb. 28, 2021	May 31, 2020
Revenue from Contract with Customer [Abstract]
Contract liabilities	$ 667	$ 667	$ 192
Recognition of contract liabilities	29	154
Remaining performance obligations	129	129
Remaining performance obligation revenue recognition within one year	49	49
Remaining performance obligation revenue recognition thereafter	$ 80	$ 80

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4. EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Net (loss) income per share:
Numerator: Net (loss) income	$ (735)	$ 245	$ (2,594)	$ 83
Denominator for basic net (loss) income per share: Weighted average shares outstanding (in thousands)	23,525	22,937	23,390	22,823
Shares used in basic net (loss) income per share calculation (in thousands)	23,525	22,937	23,390	22,823
Effect of dilutive securities (in thousands)	0	193	0	117
Denominator for diluted net (loss) income per share (in thousands)	23,525	23,130	23,390	22,940
Basic net (loss) income per share	$ (0.03)	$ 0.01	$ (0.11)	$ 0
Diluted net (loss) income per share	$ (0.03)	$ 0.01	$ (0.11)	$ 0

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4. EARNINGS PER SHARE (Details Narrative) - shares	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Employee Stock Purchase Plan
Options not included in the computation of diluted net (loss) income per share (in thousands)	139	0
Stock Options
Options not included in the computation of diluted net (loss) income per share (in thousands)	2,804	2,505
Restricted Stock Units
Options not included in the computation of diluted net (loss) income per share (in thousands)	143	0

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Assets
Investment securities	$ 80	$ 80
Level 1
Assets
Investment securities	80	80
Level 2
Assets
Investment securities	0	0
Level 3
Assets
Investment securities	0	0
Money Market Funds
Assets
Investment securities	80	80
Money Market Funds | Level 1
Assets
Investment securities	80	80
Money Market Funds | Level 2
Assets
Investment securities	0	0
Money Market Funds | Level 3
Assets
Investment securities	$ 0	$ 0

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5. FAIR VALUE OF FINANCIAL INSTRUMENTS (Details Narrative) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Fair Value Disclosures [Abstract]
Restricted cash representing a security deposit	$ 80	$ 80
Financial liabilities at fair value	0	$ 0
Transfers between Level 1 and Level 2 fair value measurements	$ 0

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6. ACCOUNTS RECEIVABLE, NET (Details Narrative) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Allowance for doubtful accounts customer trade receivables	$ 0	$ 0

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7. INVENTORIES (Details) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Inventory, Net [Abstract]
Raw materials and sub-assemblies	$ 5,626	$ 5,055
Work in process	2,713	2,917
Finished goods	0	17
Inventories	$ 8,339	$ 7,989	[1]

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

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8. PRODUCT WARRANTIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at the beginning of the period	$ 244	$ 190	$ 246	$ 154
Accruals for warranties issued during the period	78	26	270	167
Adjustments to previously existing warranty accruals	259	0	346	0
Consumption of reserves	(81)	(30)	(362)	(135)
Balance at the end of the period	$ 500	$ 186	$ 500	$ 186

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8. PRODUCT WARRANTIES (Details Narrative)	9 Months Ended
	Feb. 28, 2021
Product Warranties Disclosures [Abstract]
Product warranties disclosures	The standard warranty period is one year for systems and ninety days for parts and service.

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9. CUSTOMER DEPOSITS AND DEFERRED REVENUE, SHORT-TERM (Details) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Customer Deposits And Deferred Revenue Short-term
Customer deposits	$ 471	$ 0
Deferred revenue	116	170
Total	$ 587	$ 170

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11. LEASES (Details) - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Cash paid for amounts included in measurement of operating lease liabilities:
Operating cash flows from operating leases	$ 579	$ 550

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11. LEASES (Details 1) $ in Thousands	Feb. 28, 2021 USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2021 (excluding the first nine months of 2021)	$ 199
2022	810
2023	826
2024	164
2025	31
Thereafter	19
Total future minimum operating lease payments	2,049
Less: imputed interest	(142)
Present value of operating lease liabilities	$ 1,907

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11. LEASES (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Operating lease, weighted-average remaining lease term	2 years 7 months 6 days		2 years 7 months 6 days
Operating lease, weighted-average discount rate	5.40%		5.40%
Operating lease, cost	$ 193	$ 183	$ 568	$ 548
Minimum
Operating lease term	1 month		1 month
Maximum
Operating lease term	5 years		5 years

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12. BORROWING AND FINANCING ARRANGEMENTS (Details Narrative) - USD ($) $ in Thousands	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Borrowing under revolving credit facility	$ 1,400	$ 0
Silicon Valley Bank
Line of credit, maximum borrowing capacity	$ 4,000
Variable interest rate	The greater of (a) the prime rate plus an additional percentage of up to 1%, which additional percentage depends on the Company’s adjusted quick ratio, and (b) 4.75%.
Borrowing under revolving credit facility	$ 1,400
Balance available to borrow under the line of credit	$ 349

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13. LONG-TERM DEBT (Details Narrative) - Silicon Valley Bank $ in Thousands	Apr. 23, 2020 USD ($)
PPP loan	$ 1,679
Interest rate	1.00%

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14. STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	$ 271	$ 207	$ 798	$ 611
Cost of Sales
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	14	19	45	58
Selling, General and Administrative
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	194	137	593	401
Research and Development
Stock-based compensation in the form of employee stock options, RSUs and ESPP purchase rights, included in:
Total stock-based compensation	$ 63	$ 51	$ 160	$ 152

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14. STOCK-BASED COMPENSATION (Details 1) - Stock Options - $ / shares	3 Months Ended	9 Months Ended
	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Expected term (in years)	5 years	6 years	5 years
Volatility	72.00%	72.00%	71.00%
Risk-free interest rate	1.57%	0.39%	1.85%
Weighted average grant date fair value	$ 1.37	$ 1.09	$ .98

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14. STOCK-BASED COMPENSATION (Details 2) - Employee Stock Purchase Plan - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Expected dividend	$ 0	$ 0
Estimated forfeiture rate	0.00%	0.00%
Weighted-average grant date fair value	$ .44	$ .80
Minimum
Expected term (in years)	6 months	6 months
Volatility	74.00%	62.00%
Risk-free interest rates	0.10%	1.56%
Maximum
Expected term (in years)	2 years	2 years
Volatility	82.00%	71.00%
Risk-free interest rates	0.14%	1.81%

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14. STOCK-BASED COMPENSATION (Details 3) - Stock Option and RSU Transactions - shares	3 Months Ended			9 Months Ended
	Feb. 28, 2021	Nov. 30, 2020	Aug. 31, 2020	Feb. 28, 2021
Available shares, beginning (in thousands)	1,212	1,319	1,650	1,650
Options granted (in thousands)	0	(73)	(200)
RSUs granted (in thousands)	(42)	(57)	(196)
Shares withheld for taxes and not issued (in thousands)	4	0	0	4
Options cancelled (in thousands)	21	185	188
RSUs cancelled (in thousands)	0	0	2
Options expired (in thousands)	0	(162)	(125)
Available shares, ending (in thousands)	1,195	1,212	1,319	1,195

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14. STOCK-BASED COMPENSATION (Details 4) - Outstanding Options Stock Option Transactions - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Feb. 28, 2021	Nov. 30, 2020	Aug. 31, 2020
Options outstanding, beginning (in thousands)	2,886	3,017	3,153
Options granted (in thousands)	0	73	200
Options cancelled (in thousands)	(21)	(185)	(188)
Options exercised (in thousand)	(61)	(19)	(148)
Options outstanding, ending (in thousands)	2,804	2,886	3,017
Options fully vested and expected to vest (in thousands)	2,769
Weighted average exercise price outstanding, beginning	$ 2.16	$ 2.19	$ 2.17
Weighted average exercise price granted		1.44	1.86
Weighted average exercise price cancelled	1.86	2.42	2.18
Weighted average exercise price exercised	2.07	1.67	1.30
Weighted average exercise price outstanding, ending	2.16	$ 2.16	$ 2.19
Weighted average exercise price for options fully vested and expected to vest, ending	$ 2.17
Aggregate intrinsic value, beginning balance	$ 56	$ 148	$ 102
Aggregate intrinsic value, ending balance	1,994	$ 56	$ 148
Aggregate intrinsic value for options fully vested and expected to vest, ending	$ 1,967

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14. STOCK-BASED COMPENSATION (Details 5) $ / shares in Units, $ in Thousands	9 Months Ended
	Feb. 28, 2021 USD ($) $ / shares shares
$1.22-$1.34
Options outstanding, ending (in thousands) | shares	133
Weighted average remaining contractual life (years) options outstanding	6 years 3 months 18 days
Weighted average exercise price outstanding, ending | $ / shares	$ 1.27
Options exercisable shares, ending (in thousands) | shares	36
Weighted average remaining contractual life (years) options exercisable	6 years 4 months 10 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 1.28
$1.64-$1.86
Options outstanding, ending (in thousands) | shares	1,047
Weighted average remaining contractual life (years) options outstanding	5 years 14 days
Weighted average exercise price outstanding, ending | $ / shares	$ 1.7
Options exercisable shares, ending (in thousands) | shares	589
Weighted average remaining contractual life (years) options exercisable	4 years 6 months
Weighted average exercise price for options exercisable, ending | $ / shares	$ 1.69
$2.03-$2.46
Options outstanding, ending (in thousands) | shares	1,017
Weighted average remaining contractual life (years) options outstanding	3 years 3 months
Weighted average exercise price outstanding, ending | $ / shares	$ 2.21
Options exercisable shares, ending (in thousands) | shares	781
Weighted average remaining contractual life (years) options exercisable	2 years 10 months 10 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 2.19
$2.63-$2.81
Options outstanding, ending (in thousands) | shares	405
Weighted average remaining contractual life (years) options outstanding	7 months 28 days
Weighted average exercise price outstanding, ending | $ / shares	$ 2.71
Options exercisable shares, ending (in thousands) | shares	404
Weighted average remaining contractual life (years) options exercisable	7 months 24 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 2.71
$3.46-$3.93
Options outstanding, ending (in thousands) | shares	202
Weighted average remaining contractual life (years) options outstanding	3 years 4 months 28 days
Weighted average exercise price outstanding, ending | $ / shares	$ 3.86
Options exercisable shares, ending (in thousands) | shares	184
Weighted average remaining contractual life (years) options exercisable	3 years 4 months 28 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 3.85
$1.22-$3.93
Options outstanding, ending (in thousands) | shares	2,804
Weighted average remaining contractual life (years) options outstanding	3 years 8 months 12 days
Weighted average exercise price outstanding, ending | $ / shares	$ 2.16
Options exercisable shares, ending (in thousands) | shares	1,994
Weighted average remaining contractual life (years) options exercisable	3 years 4 days
Weighted average exercise price for options exercisable, ending | $ / shares	$ 2.28
Aggregate intrinsic value for options exercisable | $	$ 1,224

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14. STOCK-BASED COMPENSATION (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				9 Months Ended
	Feb. 28, 2021	Nov. 30, 2020	Aug. 31, 2020	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Stock Option and RSU Transactions
Intrinsic value of options exercised	$ 57			$ 92	$ 151	$ 159
Weighted average remaining contractual life of the options exercisable and expected to be exercisable					3 years 8 months 5 days	3 years 9 months 11 days
Restricted stock units granted (in thousands)	4				165
Shares withheld for taxes and not issued (in thousands)	4	0	0		4
Market value on the date of the grant	$ 2.25				$ 1.87
Restricted stock units vested (in thousands)	19			3	34	10
Restricted stock units unvested (in thousands)	143			13	143	13
Restricted stock units unvested intrinsic value	$ 400			$ 27	$ 400	$ 27
Stock Option and RSU Transactions | Board of Directors
Restricted stock units granted (in thousands)	34				126
Market value on the date of the grant	$ 2.25				$ 1.73
2016 Equity Incentive Plan
Stock-based compensation costs capitalized as part of inventory	$ 0			0	$ 0	0
Stock-based compensation expense related to stock options and RSUs	253			166	736	480
Unrecognized stock-based compensation	1,151				$ 1,151
Weighted average period for recognition of costs					2 years 7 months 6 days
Employee Stock Purchase Plan
Weighted average period for recognition of costs					1 year
Stock-based compensation related to the ESPP	18			$ 41	$ 62	$ 131
Compensation cost related to purchase rights under the ESPP but not yet recognized	$ 29				$ 29
ESPP purchase right granted (in thousands)	0			0	81	38
ESPP shares issued (in thousands)					72	71
ESPP shares available for issuance (in thousands)	511			299	511	299

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15. SEGMENT INFORMATION (Details) - USD ($) $ in Thousands	Feb. 28, 2021	May 31, 2020
Property and equipment, net	$ 617	$ 663	[1]
United States
Property and equipment, net	612	662
Asia
Property and equipment, net	5	1
Europe
Property and equipment, net	$ 0	$ 0

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

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15. SEGMENT INFORMATION (Details Narrative) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020	May 31, 2020	[1]
Operating lease right-of-use assets	$ 1,763		$ 1,763		$ 2,107
Five Largest Customers
Customers accounted for 10% or more of total revenues	95.00%	94.00%	82.00%	89.00%
Customer A
Customers accounted for 10% or more of total revenues	55.00%	71.00%	33.00%	51.00%
Customer B
Customers accounted for 10% or more of total revenues	15.00%		15.00%	18.00%
Customer C
Customers accounted for 10% or more of total revenues	11.00%		14.00%
Customer D
Customers accounted for 10% or more of total revenues	11.00%		11.00%

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.

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16. DISSOLUTION OF AEHR TEST SYSTEMS JAPAN (Details Narrative) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Feb. 28, 2021	Aug. 31, 2020	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Dissolution of Aehr Test Systems Japan
Reclassification of cumulative translation adjustment as a result of dissolution of Aehr Test Japan	$ 0	$ (2,401)	$ 0	$ (2,401)	$ 0
Net gain from dissolution of Aehr Test Systems Japan	$ 0	(2,186)	$ 0	(2,186)	0
Income tax benefit related to dissolution of Aehr Test Systems Japan		$ (215)		$ (215)	$ 0