Aehr Test Systems (AEHR) 10-Q2024 Q1 Quarterly report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

or

Commission File Number 000-22893

(510) 623-9400

(Registrant’s Telephone Number, Including Area Code)

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

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 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.

If an emerging growth company, indicated 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 ☒

There were 28,799,313 shares of the Registrant’s Common Stock outstanding as of October 9, 2023.

TABLE OF CONTENTS

PART I — FINANCIAL INFORMATION

Item 1. Financial Statements

 The Condensed Consolidated Balance Sheet as of May 31, 2023 has been derived from the audited consolidated financial statements at that date.

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited)

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited)

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited)

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited)

See accompanying Notes to Condensed Consolidated Financial Statements (unaudited)

AEHR TEST SYSTEMS

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES

Organization – Aehr Test Systems (the “Company”) was incorporated in California in May 1977 and develops and manufactures test and burn-in equipment used in the semiconductor industry.  The Company’s principal products are the FOX-XP, FOX-NP, and FOX-CP wafer contact and singulated die/module parallel test and burn-in systems, the WaferPak full wafer contactor, the DiePak carrier, the WaferPak aligner, the DiePak autoloader, and test fixtures.

Basis of Presentation – The unaudited Condensed Consolidated Financial Statements included in this quarterly report on Form 10-Q include the accounts of the Company and its wholly-owned subsidiaries and have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial reporting and the rules and regulations of the Securities and Exchange Commission (the “SEC”) for interim reporting. Accordingly, the unaudited Condensed Consolidated Financial Statements do not include certain information and footnote disclosures normally included in our annual consolidated financial statements. 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, 2023 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 should be read in conjunction with the Consolidated Financial Statements contained in the Company's Annual Report on Form 10-K for the year ended May 31, 2023.

Principles of Consolidation – The Company’s Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries and all significant intercompany accounts and transactions have been eliminated upon consolidation.

Critical Accounting Policies and use of Estimates – The Company’s significant accounting policies are disclosed in the Company’s Annual Report on Form 10-K for the year ended May 31, 2023. There have been no significant changes in the Company’s significant accounting policies during the three months ended August 31, 2023. 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, the 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. Significant estimates in these Condensed Consolidated Financial Statements include valuation of inventory at the lower of cost or net realizable value and warranty reserves. Actual results could differ from those estimates.

Reclassifications - Certain reclassifications have been made to the prior period Condensed Consolidated Financial Statements to conform to the current period presentation. The reclassifications had no impact on net income, total assets, total liabilities, or shareholders’ equity.

Concentration of Credit Risk – Financial instruments which subject the Company to concentrations of credit risk consist principally of cash and cash equivalents and accounts receivable. The Company performs credit evaluations of its customers’ financial condition and generally requires no collateral. The Company had revenues from an individual customer in excess of 10% of total revenues as follows: 

The Company had gross accounts receivable from individual customers in excess of 10% of gross accounts receivable as follows: 

Recent Accounting Pronouncements — The Company’s accounts receivable are recorded at invoiced amounts less allowance for any credit losses. According to the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-13 that the Company adopted on June 1, 2023, the Company recognizes credit losses based on forward-looking current expected credit losses (“CECL”). The Company makes estimates of expected credit losses based upon its assessment of various factors, including the age of accounts receivable balances, credit quality of its customers, current economic conditions, reasonable and supportable forecasts of future economic conditions, and other factors that may affect its ability to collect from customers. The allowance for credit losses is recognized in the condensed consolidated statements of operations. The uncollectible accounts receivable are written off in the period in which a determination is made that all commercially reasonable means of recovering them have been exhausted. The total allowance for credit losses was $0 at both August 31, 2023 and May 31, 2023, and there was no write-off of accounts receivable for the periods presented. The adoption of ASU 2016-13 did not have a material impact on the Company’s Condensed Consolidated Financial Statements.

Although there are several other new accounting pronouncements issued by the FASB, the Company does not believe any of these accounting pronouncements had or will have a significant impact on its Condensed Consolidated Financial Statements.

2. FAIR VALUE OF FINANCIAL INSTRUMENTS

Fair Value of Measurements — The Company measures its cash equivalents and money market funds at fair value on a recurring basis. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or a liability. Assets and liabilities recorded at fair value are measured and classified in accordance with a three-tier fair value hierarchy based on the observability of the inputs available in the market used to measure fair value:

Level 1 — Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets.

Level 2 — Inputs that are based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant inputs are observable in the market or can be derived from observable market data. Where applicable, these models project future cash flows and discount the future amounts to a present value using market-based observable inputs including interest rate curves, foreign exchange rates, and credit ratings.

Level 3 — Unobservable inputs that are supported by little or no market activities.

The following table represents the Company’s assets measured at fair value on a recurring basis as of August 31, 2023, and the basis for that measurement:

The following table represents the Company’s assets measured at fair value on a recurring basis as of May 31, 2023, and the basis for that measurement:

Included in money market funds as of August 31, 2023 and May 31, 2023 is $150,000 restricted cash representing a security deposit for the Company’s United States manufacturing and office space lease. There were no financial liabilities measured at fair value as of August 31, 2023 and May 31, 2023. There were no transfers between Level 1 and Level 2 fair value measurements during the three months ended August 31, 2023. The carrying amounts of financial instruments, including cash equivalents, accounts receivable, accounts payable and certain other accrued liabilities, approximate fair value due to their short maturities.

The following table summarizes the Company’s cash, cash equivalents and investments by security type as of August 31, 2023 and May 31, 2023, respectively:

Long-term investments are included in other assets on the accompanying condensed consolidated balance sheets. Unrealized gains and temporary losses on investments classified as available-for-sale are included within accumulated other comprehensive loss, net of any related tax effect. Upon realization, those amounts are reclassified from accumulated other comprehensive loss to results of operations.

Inventories

Inventories consisted of the following:

Property and equipment

Property and equipment, net consisted of the following:

* Lesser of estimated useful life or lease term.

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 months ended August 31, 2023 and 2022:

The accrued warranty balance is included in accrued expenses on the accompanying Condensed Consolidated Balance Sheets.

Deferred revenue

Deferred revenue, short-term consisted of the following:

4. INCOME TAX

The Company is subject to U.S federal and state and foreign income taxes as a corporation. The Company’s tax provision and the resulting effective tax rate for the interim period is determined based upon its estimated annual effective tax rate adjusted for the effect of discrete items arising in that quarter. The Company recorded a provision for income taxes of $16,000 and $14,000 for the three months ended August 31, 2023 and 2022, respectively, which consisted primarily of foreign withholding taxes and foreign 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 was more likely than not that certain deferred tax assets would not be realized. The Company continues to reassess the need for a valuation allowance on a quarterly basis.

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 recognizes interest and penalties related to unrecognized tax benefits as a component of income taxes.

5. BORROWING 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 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 SVB. The Amendment, among other things, extended the Revolving Line Maturity Date to July 14, 2021; provided, however, that if the Company achieved specified operating metrics on a consolidated basis on or prior to May 31, 2021 the Amended Revolving Line Maturity Date would be extended to January 13, 2022.

On January 11, 2022, the Company entered into the Second Amendment to the Loan and Security Agreement (the “Second Amendment”) with SVB. The Second Amendment, among other things, (A) increased the available amount of the line up to the lesser of (i) $10 million or (ii) the available amount under the borrowing base, under a revolving line of credit, (B) allowed for borrowing up to $3 million of the available balance based upon eligible customer purchase orders, (C) reduced the interest rate for account advances under the line to the greater of (a) prime rate plus an additional percentage up to 1.0%, which additional percentage depends on the Company’s adjusted quick ratio, and (b) 3.25%, reduces the interest rate for purchase order advances under the line to the greater of (a) prime rate plus an additional percentage up to 1.5%, which additional percentage depends on the Company’s adjusted quick ratio, and (b) 3.75%, and (D) extended the maturity date to January 13, 2023.

On January 10, 2023, the Company entered into the Third Amendment to the Loan and Security Agreement (the “Third Amendment”) with SVB. The Third Amendment, among other things, extends the Revolving Line Maturity Date to January 13, 2024, provided, however, that (i) if the Company submits a fiscal year 2024 plan of record that is generally acceptable to SVB, and (ii) the minimum net liquidity at the end of November 30, 2023 is at least $20.0 million, the Amended Revolving Line Maturity Date would be extended to January 13, 2025.

As of August 31, 2023, the Company had not drawn 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 as of August 31, 2023 was $5,396,000. There are no financial covenants in the agreement.

6. COMMITMENTS AND CONTINGENCIES

Commitments

As of August 31, 2023 and May 31, 2023, the Company had restricted money market funds of $150,000, held by a financial institution, representing a security deposit for its United States manufacturing and office space lease. This amount is included in other assets on the Condensed Consolidated Balance Sheets.

Purchase Obligations

The Company has purchase obligations to certain suppliers. In some cases, the products the Company purchases are unique and have provisions against cancellation of the order.

Contingencies

The Company may, from time to time, be involved in legal proceedings arising in the ordinary course of business. While there can be no assurances as to the ultimate outcome of any litigation involving the Company, management does not believe any pending legal proceedings will result in judgment or settlement that will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, with respect to certain matters, for example, including against losses arising from a breach of representations or covenants, or from intellectual property infringement or other claims. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. In addition, the Company has entered into indemnification agreements with its officers and directors, and the Company’s bylaws contain similar indemnification obligations to the Company’s agents.

It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. To date, payments made by the Company under these agreements have not had a material impact on the Company’s operating results, financial position or cash flow.

7. SHAREHOLDERS’ EQUITY

On August 25, 2021, the Board of Directors authorized management to take actions necessary for the execution of a $75 million shelf registration. A Registration Statement on Form S-3 was filed with the SEC on September 3, 2021. A Prospectus Supplement for an "At the Market" ("ATM") sale of $25 million of common stock was subsequently filed on September 17, 2021. On October 8, 2021, the Company executed the ATM offering by selling 1,696,729 shares of common stock at an average selling price of $14.73 per share. The gross proceeds to the Company were $25.0 million, before commission fees of $0.7 million and offering expenses of $0.3 million. Another Prospectus Supplement for an ATM sale of $25 million of common stock was subsequently filed on February 8, 2023. The Company partially executed the ATM offering by selling 208,917 shares of common stock at an average selling price of $34.78 per share. The gross proceeds to the Company were $7.3 million, before commissions of $0.2 million and offering expenses of $0.2 million. As of August 31, 2023, the remaining amount of the ATM offering was $17.7 million.

8. ACCUMULATED OTHER COMPREHENSIVE LOSS

Changes in the components of accumulated other comprehensive loss, net of tax, were as follows (in thousands):

9. 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. The Company sells its products primarily through a direct sales force. In certain international markets, the Company sells its products through independent distributors.

Transfer of control is evidenced upon passage of title and risk of loss to the customer unless we are required to provide additional services.

Disaggregation of revenue

The following presents information about the Company’s net revenues in different geographic areas, which are based upon ship-to locations, and by product category:

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

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 August 31, 2023 and May 31, 2023 were $6.1 million and $2.9 million, respectively. During the three months ended August 31, 2023, the Company recognized $0.7 million of revenues that were included in contract liabilities as of May 31, 2023.

Remaining performance obligations

On August 31, 2023, the Company had $0.1 million of remaining performance obligations, which were comprised of deferred service contracts and extended warranty contracts not yet delivered. The Company expects to recognize approximately 72% of its remaining performance obligations as revenue in the remainder of fiscal 2024, and an additional 28% in fiscal 2025 and 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 expenses 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.

10. STOCK-BASED COMPENSATION

Stock-based compensation expense consists of expenses for stock options, restricted stock units (“RSUs”), performance RSUs, or PRSUs, restricted shares, performance restricted shares and employee stock purchase plan, or 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, PRSUs, restricted shares and performance restricted shares, stock-based compensation expense is based on the fair value of the Company’s common stock at the grant date and is recognized as expense over the employee’s requisite service period. All of the Company’s stock-based compensation is accounted for as equity instruments. See Note 13 in the Company’s Annual Report on Form 10-K for fiscal 2023 filed on August 28, 2023 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 months ended August 31, 2023 and 2022:

There were $149,000 and $120,000 in stock-based compensation expense capitalized as part of inventory as of August 31, 2023 and as of May 31, 2023, respectively.

There were no options granted during the three months ended August 31, 2023. There were no ESPP purchase rights granted during the three months ended August 31, 2023 and 2022.

Nonvested restricted stock units activity during the three months ended August 31, 2023, was as follows:

11. NET INCOME PER SHARE

Basic net income per share is determined using the weighted average number of common shares outstanding during the period. Diluted net income per share is determined using the weighted average number of common shares and potential common shares (representing the dilutive effect of stock options, unvested RSUs, and ESPP shares) outstanding during the period using the treasury stock method. The following table presents the computation of basic and diluted net income per share:

For the purpose of computing diluted net income per share, weighted average potential common shares do 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. Stock options to purchase 2,000 and 152,000 shares of common stock were outstanding as of August 31, 2023 and 2022, respectively, but were not included in the computation of diluted net income per share, because the inclusion of such shares would be anti-dilutive.

12. SEGMENT AND CONCENTRATION INFORMATION

Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in deciding how to allocate resources and in assessing performance.

The Company’s chief operating decision maker, the chief executive officer, reviews discrete financial information presented on a consolidated basis for purposes of regularly making operating decisions and assessing financial performance. Accordingly, the Company considers itself to be in one operating segment.

Long-lived assets, net by geographic area are as follows:

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion of our financial condition and results of operations contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements other than statements of historical fact may be forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may,” “could,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential”, “target” or “continue,” the negative effect of terms like these or other similar expressions. Any statement concerning future financial performance (including future revenues, earnings or growth rates), ongoing business strategies or prospects, and possible actions taken by us or our subsidiaries, which may be provided by us are also forward-looking statements. These forward-looking statements are only predictions. Forward-looking statements are based on current expectations and projections about future events and are inherently subject to a variety of risks and uncertainties, many of which are beyond our control, which could cause actual results to differ materially from those anticipated or projected. All forward-looking statements included in this document are based on information available to us on the date of filing and we further caution investors that our business and financial performance are subject to substantial risks and uncertainties. We assume no obligation to update any such forward-looking statements. In evaluating these statements, you should specifically consider various factors, including the risk factors set forth in Item 1. “Business” and Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended May 31, 2023, filed with the Securities and Exchange Commission on August 28, 2023. All references to “we”, “us”, “our”, “Aehr Test”, “Aehr Test Systems” or the “Company” refer to Aehr Test Systems.

Overview

Aehr Test Systems is a leading provider of test solutions for testing, burning-in, and stabilizing semiconductor devices in wafer level, singulated die, and package part form, and has installed thousands of systems worldwide. Increasing quality, reliability, safety, and security needs of semiconductors used across multiple applications, including electric vehicles, electric vehicle charging infrastructure, solar and wind power, computing, data and telecommunications infrastructure, and solid-state memory and storage, are driving additional test requirements, incremental capacity needs, and new opportunities for Aehr Test products and solutions.

We have developed and introduced several innovative products including the FOX-P family of test and burn-in systems and FOX WaferPak Aligner, FOX WaferPak Contactor, FOX DiePak Carrier and FOX DiePak Loader. The FOX-XP and FOX-NP systems are full wafer contact and singulated die/module test and burn-in systems that can test, burn-in, and stabilize a wide range of devices such as leading-edge silicon carbide-based and other power semiconductors, 2D and 3D sensors used in mobile phones, tablets, and other computing devices, memory semiconductors, processors, microcontrollers, systems-on-a-chip, and photonics and integrated optical devices. The FOX-CP system is a low-cost single-wafer compact test solution for logic, memory and photonic devices and the newest addition to the FOX-P product family. The FOX WaferPak Contactor contains a unique full wafer contactor capable of testing wafers up to 300mm that enables Integrated Circuit manufacturers to perform test, burn-in, and stabilization of full wafers on the FOX-P systems. The FOX DiePak Carrier allows testing, burning in, and stabilization of singulated bare die and modules up to 1,024 devices in parallel per DiePak on the FOX-NP and FOX-XP systems up to nine DiePaks at a time.

Our net revenue consists primarily of sales of FOX-P systems, WaferPak Aligners and DiePak Loaders, WaferPak contactors, DiePak carriers, test fixtures, upgrades and spare parts, service contracts revenues, and non-recurring engineering 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, transfer of title and risk of loss.

Critical Accounting 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, credit losses, inventories, income taxes, 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, 2023.

There have been no material changes to our critical accounting policies and estimates during the three months ended August 31, 2023 compared to those discussed in our Annual Report on Form 10-K for the fiscal year ended May 31, 2023.

Results of Operations

Discussion of Results of Operations for the Three Months Ended August 31, 2023 compared to the Three Months Ended August 31, 2022

Revenues

Revenue increased to $20.6 million for the three months ended August 31, 2023 from $10.7 million for the three months ended August 31, 2022. Our contactor revenue increased by $10.8 million and our service revenue increased by $0.2 million, partially offset by a $1.0 million decrease in our system revenues.

On a geographic basis, revenues represent products that were shipped to or services that were performed at our customer locations. For the three months period ended August 31, 2023, international revenues significantly increased, compared to the same period in the prior year, primarily as a result of the shipments to our main customer in Asia, partially offset by the decline in net revenue from a customer in the United States.

Gross Margin

Gross profit increased to $10.0 million for the three months ended August 31, 2023 from $4.5 million for the three months ended August 31, 2022. Gross margin increased to 48.4% for the three months ended August 31, 2023 from 42.0% for the three months ended August 31, 2022. The increase in gross margin of 6.4 percentage points was primarily due to the increased sales of higher margin contactor products, as well as a reduction in manufacturing overhead due to higher production rates for future sales.

Research and Development

Research and development expenses consist primarily of personnel-related costs to support product development activities, including compensation and benefits, outside development services, travel, facilities cost allocations, and stock-based compensation charges. Research and development expenses increased to $2.5 million for the three months ended August 31, 2023, compared to $1.5 million for the three months ended August 31, 2022. The increase of $1.0 million was mostly due to non-recurring engineering services charges for $0.6 million, an increase in recruiting fees for $0.2 million and an increase in employment costs due to bonus/other compensation for $0.2 million. We anticipate our expenses in research and development will fluctuate in absolute dollars from period to period as a result of the timing of product development projects and revenue generating activity requirements.

Selling, General and Administrative

Selling, general and administrative expenses consist primarily of compensation and benefits for sales, marketing and general and administrative personnel, legal and accounting services, marketing communications, travel and facilities cost allocations, and stock-based compensation charges. Selling, general and administrative expenses increased to $3.4 million for the three months ended August 31, 2023, compared to $2.5 million for the three months ended August 31, 2022. The increase of $0.9 million was mostly due to headcount increase, higher employee-related compensation expense for $0.6 million and increased audit and professional fees for $0.2 million.

Interest and Other Income (Expense), Net