Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Income Statement [Abstract] | |||
| Revenue | $ 1,005,263 | $ 987,321 | $ 815,868 |
| Cost of revenue | 505,493 | 472,013 | 395,614 |
| Gross profit | 499,770 | 515,308 | 420,254 |
| Operating expenses: | |||
| Research and development | 131,978 | 113,860 | 104,442 |
| Sales and marketing | 69,955 | 76,044 | 61,765 |
| General and administrative | 107,077 | 79,855 | 79,575 |
| Amortization | 39,409 | 49,437 | 54,822 |
| Restructuring cost in operating expenses | (18,424) | (9,009) | (3,572) |
| Total operating expenses | 366,843 | 328,205 | 304,176 |
| Operating income (loss) | 132,927 | 187,103 | 116,078 |
| Interest income, net | 34,971 | 33,489 | 20,356 |
| Other income (expense), net | (4,996) | (145) | (3,852) |
| Income (loss) before provision (benefit) for income taxes | 162,902 | 220,447 | 132,582 |
| Provision (benefit) for income taxes | 26,143 | 18,777 | 11,423 |
| Net income | $ 136,759 | $ 201,670 | $ 121,159 |
| Earnings per share: | |||
| Basic | $ 2.78 | $ 4.09 | $ 2.47 |
| Diluted | $ 2.78 | $ 4.06 | $ 2.46 |
| Weighted average number of shares outstanding: | |||
| Basic | 49,123 | 49,343 | 48,971 |
| Diluted | 49,273 | 49,660 | 49,318 |
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Statement of Comprehensive Income [Abstract] | |||
| Net income | $ 136,759 | $ 201,670 | $ 121,159 |
| Other comprehensive income (loss), net of tax: | |||
| Change in net unrealized gains (losses) on available-for-sale marketable securities | 357 | (137) | 3,660 |
| Change in currency translation adjustments | 3,485 | (5,827) | (1,549) |
| Total other comprehensive income (loss), net of tax | 3,842 | (5,964) | 2,111 |
| Total comprehensive income | $ 140,601 | $ 195,706 | $ 123,270 |
Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowances for doubtful accounts | $ 2,462 | $ 2,585 |
| Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 3,000,000 | 3,000,000 |
| Preferred stock, shares issued | 0 | 0 |
| Preferred stock, shares outstanding | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 97,000,000 | 97,000,000 |
| Common stock, shares issued | 49,702,000 | 49,238,000 |
| Common stock, shares outstanding | 49,702,000 | 49,238,000 |
Cyber Security |
12 Months Ended |
|---|---|
Jan. 03, 2026 | |
| Cybersecurity Risk Management, Strategy, and Governance [Abstract] | |
| Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] | Cybersecurity Risk Management and Strategy We rely heavily on information technology (IT) systems in all aspects of our operations, and data security plays an important role in the protection of our proprietary information and that of our customers and suppliers. For these reasons, we take a number of steps to protect Onto Innovation’s IT systems from internal and external cybersecurity threats. Identifying and assessing cybersecurity risk is integrated into our overall risk management systems and processes. Cybersecurity risks related to our business, technical operations, and privacy and compliance issues are identified and addressed through a multi-faceted approach including third-party assessments, IT security, governance, risk and compliance reviews. To defend, detect and respond to cybersecurity incidents, we, among other things: conduct proactive cybersecurity reviews of systems and applications, perform penetration testing using external third-party tools and techniques to test security controls, conduct employee training, utilize an expert third party to continuously monitor and respond to possible threats, monitor emerging laws and regulations related to data protection and information security and implement appropriate changes. We regularly collaborate with leading security providers, industry groups, and industry peers to exchange information on trends and best practices to address new and evolving cybersecurity risks. We have implemented incident response processes which have four overarching and interconnected stages: 1) preparation for a cybersecurity incident, 2) detection and review of an incident, 3) containment and remediation, and 4) post-incident review and analysis. Cybersecurity incident responses are managed by our Corporate Incident Response Team and overseen by our Vice President of IT. Security events and data incidents are evaluated, ranked by severity and prioritized for response and remediation. Incidents are evaluated to determine materiality as well as operational and business impact, and reviewed for privacy impact. We also conduct tabletop exercises to simulate responses to cybersecurity incidents. Our team of cybersecurity professionals then collaborates with technical and business stakeholders across our business units to further analyze the risk to the Company, and form detection, mitigation and remediation strategies. Our controls are informed by recognized industry standards and frameworks and are designed to address prevention, detection, and response. Since 2021, our Information Security Management System has been certified to ISO/IEC 27001, and in the current year we achieved certification to the ISO/IEC 27001:2022 standard. Our program includes policies and standards, identity and access management (including multi‑factor authentication where appropriate), endpoint detection and response, network security and segmentation, logging and monitoring, data protection controls, secure software development practices where applicable, and business continuity and disaster recovery planning. Our program is also informed by elements of the NIST Cybersecurity Framework. Our cybersecurity program also includes third-party assessments to identify and mitigate risks from third parties such as vendors, suppliers, and other business partners associated with our use of third-party service providers. Cybersecurity risks are evaluated when determining the selection and oversight of applicable third-party service providers and potential risks when handling and/or processing our employee, business or customer data. In addition to new vendor onboarding, we have ongoing monitoring and perform risk assessments during third-party cybersecurity compromise incidents to identify and mitigate risks to us from third-party incidents. Our individual employees also play an important role in our information security systems. All employees are required to familiarize themselves with the Company’s information security policies and, at least annually, employees are required to participate in an information security training program, which is designed to help employees identify potential threats and train them on how to respond. Throughout the year, the IT department conducts simulated phishing campaigns and other simulated hacking attacks with employees as a way of reminding them of their security obligations and ensuing that our SETA (security education and training awareness) has been effective. As of the date of this Form 10-K, no risks from cybersecurity threats, including as a result of any previous cybersecurity incidents, have materially affected or are reasonably likely to materially affect us, including our business strategy, results of operations, or financial condition. For more information on the cybersecurity risks we face that could adversely impact us, please see “Part I, Item IA - Risk Factors - If our network security measures are breached and unauthorized access is obtained to a customer’s data, to our data, or to our information technology systems, we may incur significant legal and financial exposure and liabilities and may experience disruptions in our operations.” |
| Cybersecurity Risk Management Processes Integrated [Text Block] | Identifying and assessing cybersecurity risk is integrated into our overall risk management systems and processes. Cybersecurity risks related to our business, technical operations, and privacy and compliance issues are identified and addressed through a multi-faceted approach including third-party assessments, IT security, governance, risk and compliance reviews. To defend, detect and respond to cybersecurity incidents, we, among other things: conduct proactive cybersecurity reviews of systems and applications, perform penetration testing using external third-party tools and techniques to test security controls, conduct employee training, utilize an expert third party to continuously monitor and respond to possible threats, monitor emerging laws and regulations related to data protection and information security and implement appropriate changes. We regularly collaborate with leading security providers, industry groups, and industry peers to exchange information on trends and best practices to address new and evolving cybersecurity risks. |
| Cybersecurity Risk Management Processes Integrated [Flag] | true |
| Cybersecurity Risk Management Third Party Engaged [Flag] | true |
| Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] | true |
| Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] | false |
| Cybersecurity Risk Board of Directors Oversight [Text Block] | Cybersecurity Governance The Company’s Board of Directors has oversight of information security matters at the Company, including reviewing the Company’s cybersecurity practices. At least annually, the Vice President of IT presents the Company’s information security policies and programs to the Board. Our Audit Committee is tasked with overseeing risks from cybersecurity threats. Members of the Audit Committee receive updates on cybersecurity matters on a quarterly basis from one or more representatives from the Company’s Cyber Security Council (“CSC”), which is composed of our Senior Executive Team, our Vice President of IT and our IT Security Director. These updates include a discussion of existing and new cybersecurity risks (if any), updates on how management is addressing and/or mitigating those risks, and the status of information security initiatives. Other Board members also engage in conversations with management on cybersecurity-related news events and discuss any updates to our cybersecurity risk management and strategy programs outside of the scheduled meetings. The CSC is also responsible for the executive level supervision of the Company’s cybersecurity risk, information security, and technology risk, as well as the IT department’s actions to identify, assess, mitigate, and remediate cyber related issues. The CSC receives regular quarterly reports from the Vice President of IT on the Company’s cybersecurity risk profile and enterprise cybersecurity program. We have also established a process whereby potentially material cybersecurity incidents are escalated to a Cybersecurity Disclosure Committee (“CDC”) consisting of our CEO, CFO, Senior Vice President and General Counsel, Vice President of IT and Corporate Controller. The CDC is tasked with evaluating whether such incidents have material impact on the Company, and thus require disclosure, as well as any other actions that may be appropriate in response to the incident. The CDC promptly notifies the Audit Committee if it determines that an incident is likely to have a material impact on the Company and updates the Audit Committee on a quarterly basis of any incidents that it has evaluated and determined were not material. The Vice President of IT acts as our head of information security in leading our information security organization. Our Vice President of IT has over 25 years of industry experience leading large technology organizations, including, most recently, as the leader of the IT organization at a large privately held company. Our IT Security Director is a senior cybersecurity and IT leader with 27 years of experience across infrastructure design and architecture engineering, enterprise network engineering, and security operations. Other team members who support our information security program have relevant educational and industry experience, including holding similar positions at other technology companies. |
| Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] | The Company’s Board of Directors has oversight of information security matters at the Company, including reviewing the Company’s cybersecurity practices. At least annually, the Vice President of IT presents the Company’s information security policies and programs to the Board. Our Audit Committee is tasked with overseeing risks from cybersecurity threats. |
| Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] | At least annually, the Vice President of IT presents the Company’s information security policies and programs to the Board |
| Cybersecurity Risk Management Expertise of Management Responsible [Text Block] | The Vice President of IT acts as our head of information security in leading our information security organization. Our Vice President of IT has over 25 years of industry experience leading large technology organizations, including, most recently, as the leader of the IT organization at a large privately held company. Our IT Security Director is a senior cybersecurity and IT leader with 27 years of experience across infrastructure design and architecture engineering, enterprise network engineering, and security operations. Other team members who support our information security program have relevant educational and industry experience, including holding similar positions at other technology companies. |
Organization and Nature of Operations |
12 Months Ended |
|---|---|
Jan. 03, 2026 | |
| Organization And Nature Of Operations [Abstract] | |
| Organization and Nature of Operations | Organization and Nature of Operations: Onto Innovation Inc. (“Onto Innovation” or the “Company”) is a worldwide leader in the design, development, manufacture and support of process control tools that perform macro-defect inspection and metrology, lithography systems, and process control analytical software used by semiconductor and advanced packaging device manufacturers. The Company delivers comprehensive solutions throughout the semiconductor fabrication process with our families of proprietary products that provide critical yield-enhancing information, enabling microelectronic device manufacturers to drive down costs and time to market of their devices. The Company provides process and yield management solutions used in both wafer processing facilities, often referred to as “front-end” manufacturing, and in device packaging and test facilities, commonly referred to as “back-end” manufacturing. The Company’s advanced process control software portfolio includes powerful solutions for standalone tools, groups of tools, or factory-wide suites to enhance productivity and achieve significant cost savings. Onto Innovation’s systems are backed by worldwide customer service and applications support. The Company has branch sales and service offices or subsidiaries in Korea, Japan, China, Taiwan, Singapore, Malaysia, Vietnam and in several countries in Europe. The Company operates in a single reportable segment and is a provider of process characterization equipment and software for wafer fabs and advanced packaging facilities. |
Summary of Significant Accounting Policies |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies | 2. Summary of Significant Accounting Policies: Basis of Presentation and Principles of Consolidation. The consolidated financial statements reflect the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The Company has prepared these consolidated financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”). Fiscal Year. Through fiscal 2025, the Company operated on a 52- or 53-week fiscal year ending on the Saturday closest to December 31. The fiscal year of 2025 was a 53-week fiscal year that began on December 29, 2024 and ended January 3, 2026. The fiscal year of 2024 was a 52-week fiscal year that began on December 31, 2023 and ended December 28, 2024. The fiscal year of 2023 was a 52-week fiscal year that began on January 1, 2023 and ended December 30, 2023. On February 18, 2026, the Board of Directors changed the Company’s fiscal year from a 52-53 week fiscal year ending on the Saturday closest to December 31 to a December 31 fiscal year-end beginning with the fiscal year ending on December 31, 2026 Segment Reporting. The Company is organized and operates as one reportable segment, the design, development, manufacture and support of high-performance control metrology, defect inspection, lithography and data analysis systems used by microelectronics device manufacturers. The Company’s chief operating decision maker, the Chief Executive Officer, reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. For additional information on the Company’s segment reporting, see Note 15 of Notes to the Consolidated Financial Statements. Revenue Recognition. Revenue is recognized when control of the promised goods or services is transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those goods or services. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is reasonably assured. The Company accounts for shipping and handling activities as the fulfillment of a promise to transfer goods to the customer and therefore records these activities under the caption “Cost of revenue.” Sales tax and any other taxes collected concurrent with revenue producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. Contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers or the expected cost-plus margin. Systems and Software Revenue Revenue from systems is recognized when the Company transfers control of the product to the customer. To indicate transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must bear the significant risks and rewards of ownership. The Company generally transfers control for system sales when the customer or the customer’s agent picks up the system at the Company’s facility. The Company provides an assurance warranty on its systems for a period of to fourteen months against defects in material and workmanship. The Company provides for the estimated cost of product warranties at the time revenue is recognized. Depending on the terms of the systems arrangement, the Company may also defer the recognition of a portion of the consideration expected to be received because the Company has to satisfy a future obligation (e.g., installation and extended warranties). The Company uses an observable price to determine the standalone selling price for separate performance obligations or a cost-plus margin approach when one is not available. Revenue from software licenses provides the customer with a right to use the software as it exists when made available to the customer. Revenue from software licenses, which is primarily sold with our systems, is recognized upfront at the point in time when the software is made available to the customer. Revenue from licensing support and maintenance is recognized as the support and maintenance are provided, which is over the contract period. Parts Revenue Revenue from parts is recognized when the Company transfers control of the product, which typically occurs when the Company ships the product from its facilities to the customer. Services Revenue Revenue from services primarily consists of service contracts, which provide additional maintenance coverage beyond the Company’s assurance warranty on its products, service labor, consulting and training. Revenue from service contracts is recognized ratably over the term of the service contract. Revenue from service labor and consulting is recognized as services are performed. Revenue from installation services is recognized at a point in time when installation is complete. Practical Expedients The Company generally expenses sales commissions when incurred because the amortization period is one year or less. These costs are recorded within selling, general and administrative expenses. The Company applies the practical expedient outlined in ASC 606-40-32-18 which allows the company not to adjust promised consideration for the effects of a significant financing component if the payment terms are one year or less. The Company does not disclose the value of remaining performance obligations for contracts with an original expected length of one year or less and contracts for which the Company recognizes revenue in the amount to which it has the right to invoice. For additional information on the Company’s revenue recognition, see Note 10 of Notes to the Consolidated Financial Statements. Business Combinations. The Company accounts for business combinations under the acquisition method of accounting, which requires the Company to recognize separately from goodwill the assets acquired, and the liabilities assumed at their acquisition date fair values. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recognized in its consolidated statements of operations. Accounting for business combinations requires the Company’s management to make significant estimates and assumptions, especially at the acquisition date including its estimates for intangible assets, contractual obligations assumed, restructuring liabilities, pre-acquisition contingencies, and contingent consideration, where applicable. Although the Company believes the assumptions and estimates it has made in the past have been reasonable and appropriate, they are based, in part, on historical experience and information obtained from the management of the acquired companies and are inherently uncertain. Estimates in valuing certain acquired intangible assets under the income approach include growth in future expected cash flows from product sales, acquired technologies, technology obsolescence rates, estimated cash flows from the projects when completed and discount rates. Unanticipated events and circumstances may occur that may affect the accuracy or validity of such assumptions, estimates or actual results. For additional information on the Company’s business combinations, see Note 3 of these Notes to the Consolidated Financial Statements. Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates made by management include the allowance for credit losses, excess and obsolete inventory, fair value of assets acquired and liabilities assumed in a business combination, recoverability and useful lives of property, plant and equipment and identifiable intangible assets, recoverability of goodwill, recoverability of deferred tax assets, liabilities for product warranty, contingencies, including litigation reserves and share-based payments and liabilities for tax uncertainties. Actual results could differ from those estimates. These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of performance stock awards, goodwill, identifiable intangible and certain tangible assets acquired. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material. Cash and Cash Equivalents. Cash and cash equivalents include cash and highly liquid debt instruments with original maturities of three months or less when purchased. Marketable Securities. The Company determined that its investment securities are to be classified as available-for-sale. Available-for-sale debt securities are carried at fair value, with the unrealized gains and losses reported in stockholders’ equity under the caption “Accumulated other comprehensive loss.” Realized gains and losses and interest and dividends on available-for-sale securities are included in interest income and other, net. Available-for-sale securities are classified as current assets regardless of their maturity date if they are available for use in current operations. The Company reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. Factors considered in determining whether a loss is other-than-temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. When a decline in fair value is determined to be other-than-temporary, unrealized losses on available-for-sale securities are charged against earnings. The specific identification method is used to determine the gains and losses on marketable securities. For additional information on the Company’s marketable securities, see Note 5 of Notes to the Consolidated Financial Statements. Allowance for Credit Losses. The Company maintains an allowance for credit losses that is estimated based on a combination of factors including write-off history, aging analysis, forecast of future economic conditions and any specific known troubled accounts. The Company believes the allowance is adequate to cover expected losses on trade receivables. Provisions for expected credit losses are classified as selling, general and administrative expense in the Consolidated Statements of Operations. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. Inventories. Inventories are stated at the lower of cost or net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less predictable costs of completion, disposal and transportation. Cost is generally determined on a first-in, first-out basis, and includes material, labor and manufacturing overhead costs. The Company reviews and sets standard costs as needed, but at a minimum, on an annual basis, at current manufacturing costs in order to approximate actual costs. The Company evaluates inventories for excess quantities and obsolescence. The Company establishes inventory reserves when conditions exist that suggest that inventory may be in excess of anticipated demand or is obsolete based upon assumptions about historical and future demand for the Company’s products and market conditions. In addition, inventories are evaluated for potential obsolescence due to the effect of known and anticipated engineering design changes. Once a reserve has been established, it is maintained until the item to which it relates is scrapped or sold. The Company regularly evaluates its ability to realize the value of inventory based on a combination of factors including the following: historical usage rates, forecasted sales, product end-of-life dates, estimated current and future market values and new product introductions. When recorded, reserves are intended to reduce the carrying value of the Company’s inventory to its net realizable value. If actual demand for the Company’s products deteriorates, or market conditions are less favorable than those that the Company projects, additional reserves may be required. Property, Plant and Equipment. Property, plant and equipment are stated at cost. Depreciation of property, plant and equipment is computed using the straight-line method over the estimated useful lives of the assets, which are to twenty-two years for buildings, to ten years for machinery and equipment, to ten years for furniture and fixtures, three years for computer equipment, and to ten years for software. Leasehold improvements are amortized using the straight-line method over the lesser of the lease term or the estimated useful life of the related asset. Repairs and maintenance costs are expensed as incurred and major renewals and betterments are capitalized. Long-Lived Assets and Finite-Lived Acquired Intangible Assets. Long-lived assets, such as property, plant, and equipment, and identifiable acquired intangible assets with finite useful lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset, which is generally based on discounted cash flows. Goodwill and Indefinite Lived Intangible Assets. Goodwill and indefinite lived intangible assets are tested for impairment on an annual basis or when an event or changes in circumstances indicate that its carrying value may not be recoverable. Goodwill impairment is tested at the reporting unit level, which is defined as an operating segment or one level below the operating segment. The Company has one reporting unit and one operating segment. No goodwill impairment occurred in fiscal years 2025, 2024, or 2023. Goodwill is reviewed for impairment using either a qualitative assessment or a quantitative goodwill impairment test. If the Company chooses to perform a qualitative assessment and determine the fair value more likely than not exceeds the carrying value, no further evaluation is necessary. When the Company performs the quantitative goodwill impairment test, it compares fair value to carrying value, which includes goodwill. If fair value exceeds carrying value, the goodwill is not considered impaired. If the carrying value is higher than the fair value, the difference would be recognized as an impairment loss. Intangible assets with indefinite lives, including in-process research and development (“IPR&D”), are tested for impairment if impairment indicators arise and, at a minimum, annually. However, the Company is permitted to first assess qualitative factors to determine if a quantitative impairment test is necessary. Further testing is only required if the entity determines, based on the qualitative assessment, that it is more likely than not that an indefinite-lived intangible asset’s fair value is less than its carrying amount. Otherwise, no further impairment testing is required. The indefinite-lived intangible asset impairment test consists of a one-step analysis that compares the fair value of the intangible asset with its carrying amount. If the carrying amount of an intangible asset exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. The Company considers many factors in evaluating whether the value of intangible assets with indefinite lives may not be recoverable, including, but not limited to estimates of future cash flows, the discount rate, terminal growth rates, general economic conditions, our outlook and market performance of our industry and recent and forecasted financial performance. For additional information on the Company’s goodwill and purchased intangible assets, see Note 6 of Notes to the Consolidated Financial Statements. Concentration of Credit Risk. Financial instruments, which potentially subject the Company to concentrations of credit risk, consist primarily of accounts receivable, cash and cash equivalents and marketable securities. The Company maintains cash and cash equivalents and marketable securities with higher credit quality issuers and monitors the amount of credit exposure to any one issuer. The Company’s investment policy provides guidelines and limits regarding credit quality, investment concentration, investment type, and maturity that the Company believes will provide liquidity while reducing risk of loss of capital. Investments are of a short-term nature and include investments in commercial paper, corporate debt securities, asset-backed securities, U.S. Treasury, U.S. Government, and U.S. Agency debt. The Company’s accounts receivable result primarily from the sale of semiconductor equipment, related accessories and replacement parts. The Company’s customer base is highly concentrated and historically, a relatively small number of customers have accounted for a significant portion of its receivables. Write-offs of uncollectible accounts have historically not been material. The Company actively monitors its customers’ financial strength to reduce the risk of loss. Warranties. The Company generally provides a warranty on its products for a period of twelve to fourteen months against defects in material and workmanship. The Company accrues for the estimated cost of product warranties at the time revenue is recognized. The estimated future warranty obligations are affected by the warranty periods, sales volumes, product failure rates, material usage and labor and replacement costs incurred in correcting a product failure. If actual product failure rates, material usage, labor or replacement costs differ from the Company’s estimates, revisions to the estimated warranty obligations would be required. The warranty accrual represents the best estimate of the amount necessary to settle future and existing claims on products sold as of the balance sheet date. The Company periodically assesses the adequacy of its recorded warranty reserve and adjusts the amounts in accordance with changes in these factors. Income Taxes. The Company accounts for income taxes using the asset and liability approach for deferred taxes which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. A valuation allowance is recorded to reduce a deferred tax asset to the portion which more likely than not will be realized. For additional information on the Company’s income taxes, see Note 13 of Notes to the Consolidated Financial Statements. Translation of Foreign Currencies. The Company’s international branches and subsidiaries primarily generate and expend cash in their local functional currency. Accordingly, all balance sheet accounts of these local functional currency branches and subsidiaries are translated into U.S. dollars at the fiscal period-end exchange rate, and income and expense accounts are translated into U.S. dollars using average rates in effect for the period. The resulting translation adjustments are recorded as cumulative translation adjustments and are recorded directly as a separate component of stockholders’ equity under the caption, “Accumulated other comprehensive loss.” The Company had accumulated exchange losses resulting from the translation of foreign operation financial statements of $11.0 million and $14.5 million as of January 3, 2026 and December 28, 2024, respectively. Share-based Compensation. The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. Compensation expense is recognized using the straight-line attribution method to recognize share-based compensation over the service period of the award, with adjustments recorded for forfeitures as they occur. For additional information on the Company’s share-based compensation plans, see Note 11 of Notes to the Consolidated Financial Statements. Research and Development Costs. Expenditures for research and development are expensed as incurred. Derivative Instruments and Hedging Activities. The Company’s policy is to mitigate the effect of exchange rate fluctuations on certain foreign currency denominated business exposures. The Company has a policy that allows for the use of derivative financial instruments to hedge foreign currency exchange rate fluctuations on forecasted revenue and net monetary assets or liabilities denominated in various foreign currencies. The Company carries derivative financial instruments (derivatives) on the balance sheet at their fair values, in either prepaid expenses and other current assets or other current liabilities in the Consolidated Balance Sheets. The Company does not use derivatives for trading or speculative purposes. The Company does not believe that it is exposed to more than a nominal amount of credit risk in its foreign currency hedges, as counterparties are large, global and well-capitalized financial institutions. The Company’s exposures are in liquid currencies (Japanese yen, euros, Korean won, Taiwanese dollars, Chinese renminbi and Singapore dollars), so there is minimal risk that appropriate derivatives to maintain the Company’s hedging program would not be available in the future. To hedge foreign currency risks, the Company uses foreign currency exchange forward contracts, where possible and prudent. These hedge contracts are valued using standard valuation formulas with assumptions about future foreign currency exchange rates derived from existing exchange rates, interest rates, and other market factors. The dollar equivalent of the U.S. dollar forward contracts and related fair values as of January 3, 2026 and December 28, 2024 were as follows:
During the years ended January 3, 2026 and December 28, 2024, the Company recognized losses of million and million on maturities of forward contracts, respectively. During the year ended December 30, 2023, the Company recognized a gain of million on maturities of forward contracts. The aggregate notional amounts of matured contracts were $485.6 million, $423.4 million and $319.4 million for 2025, 2024 and 2023, respectively. Contingencies and Litigation. The Company is subject to the possibility of losses from various contingencies, including certain legal proceedings, lawsuits and other claims. The Company accrues for a loss contingency when it concludes that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. If the Company concludes that loss contingencies that could be material to any one of its financial statements are not probable, but are reasonably possible, or are probable, but cannot be estimated, then the Company discloses the nature of the loss contingencies, together with an estimate of the range of possible loss or a statement that such loss is not reasonably estimable. The Company expenses as incurred the costs of defending legal claims against the Company. The Company does not recognize gain contingencies until realized. See Note 9 of the Notes to the Consolidated Financial Statements, “Commitments and Contingencies” for a detailed description. Recent Accounting Pronouncements. Recently Adopted or Effective In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company applied the amendments prospectively for the fiscal year ended January 3, 2026, and the impact of the adoption of the amendments in this update was not material to the Company’s consolidated financial position and results of operations for the fiscal year ended January 3, 2026, since the amendments require only enhancement of existing income tax disclosures in the footnotes to the Company’s consolidated financial statements. Updates Not Yet Effective In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements,” to clarify and reorganize U.S. GAAP interim reporting guidance to improve navigability, applicability, and consistency without changing the fundamental nature or volume of required interim disclosures. This amendment clarifies when ASC 270 is applicable, establishes a disclosure principle requiring disclosure of material events or changes occurring since the most recent annual reporting period, and consolidates into ASC Topic 270 a comprehensive list of interim disclosures required by other Codification Topics. The amendment also clarifies the form and content of interim financial statements, including guidance for condensed interim reporting. The amendment is effective for the Company for interim periods in 2028, with early adoption permitted. The impact of the adoption of the amendments in this update is not expected to be material to the Company’s consolidated financial position and results of operations. In December 2025, the FASB issued ASU 2025‑10, “Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities,” to establish specific guidance for the recognition, measurement, presentation, and disclosure of government grants received to reduce diversity and increase consistency amongst business entities in accounting for such grants. This amendment amends Accounting Standards Codification “ASC” Topic 832 to require that a government grant received by a business entity should not be recognized as income until it is probable that a business entity will comply with the conditions attached to the grant and the grant will be received, with any grant related to an asset to be purchased, constructed or acquired such as long-lived assets or inventory to be recognized on the balance sheet as either deferred income or as an adjustment to the cost basis of the related asset, or the cost accumulation approach, as such costs are incurred. Any grant income or deferred income shall be recognized in earnings on a systematic and rational basis over the periods in which a business entity recognizes as expenses the costs for which the grant is intended to compensate, whereas any grants accounted for using the cost accumulation approach will not have a direct subsequent recognition in earnings, but rather reduced depreciation or amortization in accounting for the related asset. Entities are also required to present grants recognized in earnings separately under other income or deducted from the related expense, and provide disclosures of the nature of the government grant received, the accounting policies used to account for the grant, and the significant terms and conditions of the grant. The amendment is effective for the Company for annual and interim periods in 2029, with early adoption and multiple transition methods permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In December 2025, the FASB issued ASU 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements,” to amend certain aspects of its hedge accounting guidance to better reflect an entity’s risk management activities in the financial statements. The guidance expands the hedged risks permitted to be aggregated in a group of individual forecasted transactions and increases the variable price components eligible to be designated as the hedged risk in the forecasted purchase or sale of nonfinancial assets. For public business entities, the provisions of ASU 2025-09 are effective for fiscal years beginning after December 15, 2026. Early adoption is permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, “Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which removes all references to software development stages and clarifies the threshold entities apply to begin capitalizing costs. ASU 2025-06 is effective for annual periods beginning after December 15, 2027 and interim reporting periods within those annual reporting periods. The ASU may be applied prospectively, retrospectively or through a modified transition approach with early adoption permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In July 2025, the FASB issued ASU 2025-05, “Financial Instruments - Credit Losses (Topic 326),” which simplifies the estimation of credit losses on current accounts receivable and current contract assets arising from transactions accounted for under Accounting Standards Codification 606, Revenue from Contracts with Customers. The guidance allows all entities to use a practical expedient to assume that the current conditions as of the balance sheet date will remain unchanged for the remaining life of the asset when developing a reasonable and supportable forecast as part of estimating expected credit losses on these assets. The guidance is effective for fiscal years beginning after December 15, 2025, and interim periods within those fiscal years. Early adoption is permitted. Entities that elect the practical expedient are required to apply the amendments prospectively. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements. In November 2024, the FASB issued ASU 2024-03, “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40),” which requires additional disclosure of certain costs and expenses, including inventory purchases, employee compensation, selling expense and depreciation expense within the notes to financial statements. The guidance is effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact that the updated standard will have on its financial statements and related disclosures. |
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Bussiness Combination |
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| Business Combination [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Text Block] | 3. Business Combination: On November 17, 2025 (the “Acquisition Date”), the Company completed the previously announced acquisition of Semilab USA LLC (“Semilab USA”), pursuant to the Equity Purchase Agreement (the “Purchase Agreement”), dated as of June 27, 2025, by and among the Company, Semilab International Zrt. (the “Seller”), Semilab Zrt. and Semilab USA, as amended by the Amendment to Equity Purchase Agreement, dated October 9, 2025. The preliminary Acquisition Date fair value of consideration transferred consisted of the following:
The Company accounted for the acquisition of Semilab USA in accordance with ASC Topic 805, Business Combinations (“ASC 805”). The acquired assets and assumed liabilities were recorded at their estimated fair values. The Company determined the estimated fair values with the assistance of valuations performed by a third-party specialist, discounted cash flow analysis, and estimates made by management. The acquisition strengthens the Company’s capabilities in inline wafer contamination monitoring, materials characterization, and unique surface charge metrology. The goodwill recognized reflects the anticipated benefits from expanding the Company’s product portfolio and its growth opportunities in both new and existing markets. As the purchase price exceeded the fair value of Semilab USA’s identifiable net assets, goodwill was recorded in connection with the transaction. The Company does not expect the goodwill to be deductible for income tax purposes. A portion of the overall purchase price was allocated to acquired intangible assets. Amortization expense associated with acquired intangible assets is not deductible for tax purposes. Therefore, a deferred tax liability of $46.6 million was established primarily for the future amortization of these intangibles and is included in “other long-term liabilities” in the table below. The inventory fair value step‑up is non‑recurring and is recognized as an increase to cost of goods sold as the related inventory is sold. For the year ended January 3, 2026, the Company recognized $4.0 million of expense related to the step‑up. The remaining balance of approximately $9.1 million is expected to be recognized over the estimated sell‑through period of one year following the acquisition date. The following table summarizes the preliminary purchase price allocation of the fair values of the assets acquired and liabilities assumed:
The following table sets forth the preliminary amounts, allocated to the intangible assets identified and their estimated useful lives as of the Acquisition Date:
The developed technology intangible assets were valued using the relief-from-royalty method under the income approach, which estimates value based on the royalty a market participant would pay to license the technology. Under this approach, the after‑tax royalty savings attributable to ownership represent the economic benefit of the asset. The key assumptions used in the valuation included the estimated royalty rate, projected revenue attributable to the developed technology, the expected useful life of the asset, and a discount rate reflecting the risks associated with the projected cash flows. The assets are amortized on a straight‑line basis over their estimated 7‑year useful life, which approximates the expected pattern of economic benefits. The customer relationships and backlog intangible assets were valued using the multi-period excess earnings method under the income approach, which isolates the net cash flows attributable to each asset and discounts them to present value. Significant assumptions included projected customer revenue and attrition rates, estimated operating margins, contributory asset charges, the expected useful life of the asset, and a discount rate reflecting the risks associated with the asset‑specific cash flows. The customer relationship asset is amortized on a straight-line basis over its 6‑year estimated life to reflect the pattern of expected economic benefits. The backlog asset is amortized on a straight-line basis over its 1.3 year estimated life to reflect the pattern of expected economic benefits. There were no significant contingencies assumed as part of the acquisition. Acquisition-related costs totaled $12.5 million for the fiscal year ended December 31, 2025. These costs were expensed as incurred and are presented within general and administrative expense in the Company's consolidated statement of operations. The purchase price allocation for the Semilab USA acquisition is preliminary and reflects management’s current estimates of the fair value of the assets acquired and liabilities assumed in accordance with ASC 805. The Company is still evaluating certain items within the measurement period, including the final determination of the working capital adjustment, which remains subject to post‑closing review procedures outlined in the purchase agreement. Accordingly, the provisional amounts recognized for the acquired net assets are subject to change during the remainder of the measurement period (which will not exceed 12 months from the acquisition date). Any such revisions or changes may be material. From the acquisition date through January 3, 2026, Semilab USA contributed $8.6 million of revenue and an operating loss of $6.2 million to the Company’s consolidated results.
Pro Forma Results The unaudited pro forma financial information presented below was derived from historical financial records of Onto and Semilab USA and presents the operating results for the periods presented as if the Acquisition occurred on January 1, 2024. The pro forma results include adjustments to adjust for the impact of purchase accounting adjustments including amortization and depreciation expense, and the related tax effects. Accordingly, the following unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the Acquisition had occurred at the beginning of 2024, nor are they indicative of future results of operations:
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Fair Value Measurements |
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| Fair Value Measurements | Fair Value Measurements: Fair Value of Financial Instruments The Company has evaluated the estimated fair value of financial instruments using available market information and valuations as provided by third-party sources. The use of different market assumptions and/or estimation methodologies could have a significant effect on the estimated fair value amounts. The carrying value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximates fair value because of the short-term maturity of these instruments. Fair Value Hierarchy The Company applies a three-level valuation hierarchy for fair value measurements. This hierarchy prioritizes the inputs into three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities. Level 2 inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the asset or liability. Level 3 inputs are unobservable inputs based on management’s assumptions used to measure assets and liabilities at fair value. A financial asset’s or liability’s fair value measurement classification within the hierarchy is determined based on the lowest level input that is significant to the fair value measurement. The following table provides the assets carried at fair value measured on a recurring basis at January 3, 2026 and December 28, 2024:
Available-for-sale debt securities classified as Level 2 are valued using observable inputs to quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. The foreign currency forward contracts are primarily measured based on the foreign currency spot and forward rates quoted by the banks or foreign currency dealers. Available-for-sale debt securities prices are obtained from third party pricing providers, which model prices utilizing the above observable inputs, for each asset class. See Note 5 for additional discussion regarding the fair value of the Company’s marketable securities. Non-recurring Fair Value Measurements During the fiscal year ended January 3, 2026, the Company invested $8.0 million in the equity of a privately-held company. There were no such investments at December 28, 2024. This non-marketable equity investment is recorded at fair value on a non-recurring basis and is classified as a Level 3 asset in “Other assets” on the Condensed Consolidated Balance Sheets. This non-marketable equity investment is generally accounted for under the measurement alternative, defined as cost, less impairments, adjusted for subsequent observable price changes and is periodically assessed for impairment when events or circumstances indicate that decline in value may have occurred. As of January 3, 2026, there have been no impairments recorded for the non-marketable equity investment. |
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Marketable Securities |
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| Marketable Securities | Marketable Securities: At January 3, 2026 and December 28, 2024, marketable securities are categorized as follows:
The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Consolidated Balance Sheet classification, is as follows at January 3, 2026 and December 28, 2024:
The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at January 3, 2026 and December 28, 2024.
See Note 4 for additional discussion regarding the fair value of the Company’s marketable securities. |
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Goodwill and Purchased Intangible Assets |
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| Goodwill and Purchased Intangible Assets | Goodwill and Purchased Intangible Assets: Goodwill and purchased intangible assets with indefinite useful lives are not amortized but are reviewed for impairment annually during the fourth quarter of each fiscal year and whenever events or changes in circumstances indicate that the carrying value of an asset may not be recoverable. The process of evaluating the potential impairment of goodwill and intangible assets requires significant judgment. The Company regularly monitors current business conditions and considers other factors including, but not limited to, adverse industry or economic trends, restructuring actions and lower projections of profitability that may impact future operating results. The Company performed its annual qualitative assessment in the fourth quarter of fiscal 2025 and concluded that no impairment charge was required. Goodwill The changes in the carrying amount of goodwill are as follows:
The $314.0 million of goodwill acquired in 2025 resulted from the purchase of Semilab USA, See Note 3, “Business Combination,” for further details.
Purchased Intangible Assets Purchased intangible assets as of January 3, 2026 and December 28, 2024 are as follows:
During the fiscal year ended January 3, 2026, the Company disposed of fully amortized identifiable intangible assets whose gross carrying value totaled $117 million. There were no disposals of identifiable intangible assets during the fiscal year ended December 28, 2024. During the fiscal year ended January 3, 2026, the Company acquired $210.0 million of identifiable intangible assets resulted from the purchase of Semilab USA, See Note 3, “Business Combination,” for further details. Intangible asset amortization expense amounted to $39.4 million, $49.4 million and $54.8 million for the years ended January 3, 2026, December 28, 2024 and December 30, 2023, respectively. Assuming no change in the gross carrying value of identifiable intangible assets and estimated lives, estimated amortization expenses are $77.6 million for 2026, $55.4 million for 2027, $42.5 million for 2028, $35.2 million for 2029, and $35.1 million for 2030. |
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Leasing Arrangements |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lessee Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leasing Arrangements | Leasing Arrangements: The Company determines if an arrangement is a lease at its inception. Operating lease arrangements are comprised primarily of real estate and equipment agreements for which the right-of-use assets are included in “Other assets” and the corresponding lease liabilities, depending on their maturity, are included in “Other current liabilities” or “Other non-current liabilities” in the Consolidated Balance Sheets. Right-of-use assets represent the right to use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized at the lease commencement date based on the estimated present value of lease payments over the lease term. The lease term includes options to extend the lease when it is reasonably certain that the option will be exercised. Lease agreements frequently require the Company to pay real estate taxes, insurance and maintenance costs. Leases with a term of one year or less are not recorded on the Consolidated Balance Sheets and lease expense for these leases is recognized on a straight-line basis over the lease term. Lease costs for operating leases were $7.0 million and $6.4 million for the years ended January 3, 2026 and December 28, 2024, respectively. Operating lease costs are generally recognized over the lease term. The Company uses its estimated incremental borrowing rate in determining the present value of lease payments considering the term of the lease, which is derived from information available at the lease commencement date, giving consideration to publicly available data for instruments with similar characteristics. The Company accounts for the lease and non-lease components as a single lease component.
Supplemental cash flows information related to leases was as follows:
As of January 3, 2026, there was an insignificant amount of commitments for operating leases that have not yet commenced. The reconciliation of the maturities of operating leases to the lease liabilities recorded on the Consolidated Balance Sheet as of January 3, 2026 is as follows:
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Balance Sheet Components |
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| Balance Sheet Components [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Balance Sheet Components | Balance Sheet Components: Inventories Inventories are comprised of the following:
Property, Plant and Equipment Property, plant and equipment, net, is comprised of the following:
Other assets Other assets is comprised of the following:
Accrued liabilities Accrued liabilities is comprised of the following:
Other current liabilities Other current liabilities is comprised of the following:
Other non-current liabilities Other non-current liabilities is comprised of the following:
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Commitments and Contingencies |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies | Commitments and Contingencies: Intellectual Property Indemnification Obligations The Company has entered into agreements with customers that include limited intellectual property indemnification obligations that are customary in the industry. These guarantees generally require the Company to compensate the other party for certain damages and costs incurred as a result of third-party intellectual property claims arising from these transactions. The nature of the intellectual property indemnification obligations prevents the Company from making a reasonable estimate of the maximum potential amount it could be required to pay to its customers. Historically, the Company has not made any indemnification payments under such agreements and no amount has been accrued in the accompanying consolidated financial statements with respect to these indemnification guarantees. Warranty Reserves The Company generally provides a warranty on its products for a period of 12 to 14 months against defects in material and workmanship. The Company estimates the costs that may be incurred during the warranty period and records a liability in the amount of such costs at the time revenue is recognized. The Company’s estimate is based primarily on historical experience. The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary. Settlements of warranty reserves are generally associated with sales that occurred during the 12 to 14 months prior to the year-end and warranty accruals are related to sales during the same year. Changes in the Company’s warranty reserves are as follows:
Warranty reserves are reported in the Consolidated Balance Sheets under the captions “Accrued liabilities” and “Other non-current liabilities.” Legal Matters From time to time, the Company is subject to legal proceedings and claims in the ordinary course of business. The Company does not believe that any current legal matters will have a material adverse effect on our financial position, results of operations or cash flows. Open and Committed Purchase Orders As of January 3, 2026, the Company has open and committed purchase orders of $256.4 million, of which $248.1 million is for less than one year. Line of Credit The Company has a credit agreement with a bank that provides for a variable-rate line of credit which is secured by the marketable securities the Company has with the bank. The Company is permitted to borrow up to 70% of the value of eligible securities held at the time the line of credit is accessed, up to a maximum of $100 million. The available line of credit as of January 3, 2026 was approximately $100 million with an available interest rate of 4.3%. The credit agreement is available to the Company until such time that either party terminates the arrangement at their discretion. As of the date of this filing, the Company has not utilized the line of credit. |
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Revenue |
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| Revenue | Revenue: The following table represents a disaggregation of revenue by timing of revenue:
See Note 15 of the Notes to the Consolidated Financial Statements for additional discussion of the Company’s disaggregated revenue in detail. Contract Assets and Contract Liabilities Contract assets consist of amounts the Company has not invoiced but has completed the related performance obligation. These amounts generally arise from variances between the contractual payment terms and the transaction price assigned to the open performance obligations (e.g., the Company has recognized revenue in an amount greater than the amount that is billable under the contract). The contract assets amounts are recorded in “Accounts receivable” in the Consolidated Balance Sheets. As of January 3, 2026 and December 28, 2024, the Company had contract assets of $3.5 million and $10.1 million, respectively. The Company records contract liabilities when the customer has been billed in advance of the Company completing its performance obligations primarily with respect to liabilities related to service contracts and installation. For contracts that have a duration of one year or less, these amounts are recorded as “Deferred revenue” in the Consolidated Balance Sheets. For contracts with a duration longer than one year, these amounts are recorded in “Other non-current liabilities” in the Consolidated Balance Sheets. As of January 3, 2026 and December 28, 2024, the Company carried a long-term deferred revenue balance of $6.3 million and $4.0 million, respectively. Changes in deferred revenue were as follows:
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Share-Based Compensation and Employee Benefit Plans |
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| Share-Based Payment Arrangement [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Compensation and Employee Benefit Plans | Share-Based Compensation and Employee Benefit Plans: Share-Based Compensation Plans The Company’s share-based compensation plans are intended to attract and retain employees and to provide an incentive for them to assist the Company to achieve long-range performance goals and to enable them to participate in long-term growth of the Company. The Company settles restricted stock unit awards, employee stock purchase option exercises with newly issued common shares. Onto Innovation Inc. 2020 Stock Plan, as amended and restated (the “2020 Plan”). The 2020 Plan provides for the grant of 3.7 million stock options and other stock awards to employees, directors and consultants at an exercise price equal to the fair market value of the common stock on the date of grant. Options granted under the 2020 Plan typically grade vest over a three-year period and expire ten years from the date of grant. Restricted stock units granted under the 2020 Plan typically vest over a three-year period for employees and one year for directors; however, other vesting periods are allowable under the 2020 Plan. Restricted stock units (“RSUs”) granted to employees have time based or performance-based vesting. As of January 3, 2026, there were 2.4 million shares of common stock available for issuance pursuant to future grants under the 2020 Plan. Onto Innovation Inc. 2020 Employee Stock Purchase Plan (the “2020 ESPP”). Under the terms of the 2020 ESPP, eligible employees may have up to 10% of eligible compensation deducted from their pay and applied to the purchase of shares of Company common stock. The price the employee pays for each share of stock is 85% of the lesser of the fair market value of Company common stock at the beginning or the end of the applicable six-month purchase period. The 2020 ESPP is intended to qualify under Section 423 of the Internal Revenue Code and is a compensatory plan as defined by FASB ASC Topic 718, “Stock Compensation.” Through the Company’s employee stock purchase plans, employees purchased 137 thousand, 83 thousand and 91 thousand shares during the twelve months ended January 3, 2026, December 28, 2024 and December 30, 2023, respectively. As of January 3, 2026 and December 28, 2024, there were 0.8 million and 0.9 million, shares available for issuance under the Company’s employee stock purchase plan, respectively. Share-based compensation was allocated in the Company’s Consolidated Statement of Operations as follows:
Restricted Stock Units During fiscal years 2025, 2024 and 2023, the Company issued both service-based RSUs and market-based performance RSUs (“PRSUs”). Service-based RSUs typically vest over a period of 3 years or less. Market-based PRSUs generally vest three years from the grant date if certain performance criteria are achieved and require continued employment. Based upon the terms of such awards, the number of shares that can be earned over the performance periods is based on the Company’s common stock price performance compared to the market price performance of a designated benchmark index, ranging from 0% to 200% of target. The designated benchmark index was the Philadelphia Semiconductor Sector Index for market-based PRSUs issued in 2025, 2024 and 2023. The stock price performance or market price performance is measured using the closing price for the 20-trading days prior to the dates the performance period begins and ends. The following table summarizes the Company’s combined service-based RSUs and market-based PRSUs:
The Company granted the following restricted stock units (“RSUs” and each, an “RSU”) and market-based performance restricted stock units (“PRSUs” and each, a “PRSU”):
The Company withholds common stock shares associated with net share settlements to cover tax withholding obligations upon the vesting of restricted stock unit awards under the Company’s equity incentive program. During the twelve months ended January 3, 2026 and December 28, 2024, the Company withheld 95 thousand and 102 thousand shares through net share settlements, respectively. For the twelve month periods ended January 3, 2026 and December 28, 2024, net share settlements cost $13.5 million and $19.1 million, respectively. Of the 484 thousand shares outstanding at January 3, 2026, 402 thousand are service-based RSUs and 82 thousand are market-based PRSUs. The fair value of the Company’s service-based RSUs is based on the fair market value of the Company’s stock at the date of grant. As of January 3, 2026, there was $37.2 million of total unrecognized compensation cost related to RSUs granted under the plans. That cost is expected to be recognized over a weighted average period of 1.8 years. 401(k) Savings Plan The Company has a 401(k) savings plan that allows employees to contribute up to 100% of their annual compensation to the Plan on a pre-tax or after-tax basis, limited to a maximum annual amount as set periodically by the Internal Revenue Service. The plan provides a 50% match of all employee contributions up to 6 percent of the employee’s salary. Matching contributions to the plan totaled $3.3 million, $3.2 million and $3.1 million for the years ended January 3, 2026, December 28, 2024 and December 30, 2023, respectively. Non-Qualified Deferred Compensation Plan During the fiscal year ended January 3, 2026, the Company established an unfunded nonqualified deferred compensation plan (“the Plan”) for certain members of management and nonemployee directors. The Plan is intended to comply with Section 409A of the Internal Revenue Code of 1986, as amended. Eligible employee participants may elect to defer up to 75% of their annual base salary and up to 100% of their annual bonus, performance share units, and restricted stock units. Eligible non‑employee directors may elect to defer up to 100% of their annual retainer, meeting fees, and restricted stock units. As the Plan was established during fiscal 2025 and the first deferral elections apply to compensation earned in 2026, no participant account balances existed in any of the periods presented. |
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Other Income (Expense), Net |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Income Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Income (Expense), Net | Other Expense, Net: Other expense, net is comprised of the following:
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Income Taxes |
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Income Taxes: The components of income tax expense are as follows:
Income before provision for income taxes is comprised of the following:
Beginning with its 2025 annual reporting, the Company adopted ASU 2023‑09 on a prospective basis. As a result of this adoption, the Company is presenting the following rate reconciliation. The provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income tax rate of 21% for the year ended January 3, 2026, to income before provision for income taxes as follows:
For the years ended December 28, 2024 and December 30, 2023, prior to the Company’s adoption of ASU 2023‑09, the reconciliation of the provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income taxes rate of 21% to income before provision for income taxes as follows:
Deferred tax assets and liabilities are comprised of the following:
At January 3, 2026 and December 28, 2024, the Company had recorded valuation allowances of $15.4 million and $12.2 million, respectively, on a certain portion of the Company’s deferred tax assets to reflect the deferred tax assets at the net amount that is more likely than not to be realized. The Company maintains a valuation allowance against its federal foreign tax credit carryforwards of $1.0 million and state research and development credits of $14.4 million. In assessing the realizability of deferred tax assets, the Company uses a more likely than not standard. If it is determined that it is more likely than not that deferred tax assets will not be realized, a valuation allowance must be established against the deferred tax assets. The ultimate realization of the assets is dependent on the generation of future taxable income during the periods in which the associated temporary differences become deductible. Management considers the scheduled reversal of deferred income tax liabilities, projected future taxable income and tax planning strategies when making this assessment. In making the determination that it is more likely than not that the Company’s deferred tax assets will be realized as of January 3, 2026, the Company relied primarily on the reversal of deferred tax liabilities as well as projected future taxable income. At January 3, 2026, the Company had tax effected federal, state, and foreign net operating loss carryforwards of $0.3 million, $0.9 million and $0.2 million, respectively. The federal, state and foreign net operating loss carryforwards expire on various dates beginning in 2033. At January 3, 2026, the Company had foreign tax credit carryforwards and state research & development credits of $1.1 million, and $19.8 million, respectively. The foreign tax credit carryforwards are set to expire at various dates beginning December 31, 2030. The state research & development credit carryforwards are set to expire at various dates beginning December 31, 2028. As of January 3, 2026, the Company has not provided U.S. income taxes on all its foreign earnings. The Company continues to permanently reinvest the cash held offshore to support its working capital needs. The Company has accrued $0.9 million for additional taxes associated with its Taiwan branch. On July 4, 2025, the One Big Beautiful Bill Act (“The Act”) was signed into law. The Act makes permanent key elements of the Tax Cuts and Jobs Act, including 100 percent bonus depreciation, domestic research cost expensing, increases the Advanced Manufacturing Investment Credit to 35 percent from 25 percent and makes modifications to the international tax framework. The Act includes multiple effective dates, with certain provisions effective in 2025 and others phased in through 2027. The Company continues to evaluate the impact of the Act's provisions that take effect in future years. The total amount of unrecognized tax benefits are as follows:
The unrecognized tax benefits at January 3, 2026 and December 28, 2024 were $25.4 million and $13.0 million, respectively, of which $10.3 million and $6.7 million, respectively, would be reflected as an adjustment to income tax expense if recognized. The year-over-year increase from 2024to 2025 is primarily due to unrecognized tax benefits associated with the acquisition of Semilab USA, as well as build for current year unrecognized tax benefits, offset by reserve releases from expiring tax statutes. The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense. During the years ended January 3, 2026, December 28, 2024 and December 30, 2023, the Company recognized approximately $(12) thousand, $(223) thousand and $146 thousand, respectively, in interest and penalties (benefit) expense associated with uncertain tax positions. As of January 3, 2026 and December 28, 2024, the Company had accrued interest and penalties expense included in the table of unrecognized tax benefits of $545 thousand and $564 thousand, respectively. The Company is subject to U.S. federal income tax as well as income tax in multiple state and foreign jurisdictions. The Company is subject to ordinary statute of limitation rules of three and four years for federal and state returns, respectively. However, due to tax attribute carryforwards, the Company is subject to examination for tax years 2022 forward for U.S. federal tax purposes with respect to carryforward amounts. The Company is also subject to examination in various states for tax years 2006 forward with respect to carryforward amounts. The Company is subject to examination for tax years 2016 forward for various foreign jurisdictions. The Company believes that adequate amounts have been reserved for any adjustments that may ultimately result from any future examinations of these years. In the normal course of business, the Company is subject to tax audits in various jurisdictions, and such jurisdictions may assess additional income taxes or other taxes against it. Although the Company believes its tax estimates are reasonable, the final determination of tax audits and any related litigation could be materially different from the Company’s historical income tax provisions and accruals. The results of an audit or litigation could have a material adverse effect on the Company’s results of operations or cash flows in the period or periods for which that determination is made. Cash paid for income taxes, net of refunds received, by jurisdiction pursuant to the disclosure requirements of ASU 2023-09 for the year ended January 3, 2026 is as follows:
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Accumulated Other Comprehensive (Income) Loss |
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| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Other Comprehensive (Income) Loss | Accumulated Other Comprehensive Loss: Comprehensive income includes net income, foreign currency translation adjustments, and net unrealized gains and losses on available-for-sale debt securities. See the Consolidated Statements of Comprehensive Income for the effect of the components of comprehensive income on the Company’s net income. The components of accumulated other comprehensive income (loss), net of tax, are as follows:
For the twelve months ended January 3, 2026, December 28, 2024 and December 30, 2023, tax effects on net income of amounts recorded in other comprehensive income (loss) were $98.5 thousand, $(36.8) thousand and $0.9 million, respectively. |
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Segment Reporting and Geographic Information |
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| Segment Reporting [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting and Geographic Information | Segment Reporting and Geographic Information: The Company is organized and operates as one operating and reportable segment; the design, development, manufacture and support of high-performance control metrology, defect inspection, lithography and data analysis systems used by microelectronics device manufacturers. This determination is based on the management approach which designates internal information regularly available to the Chief Operating Decision Maker (“CODM”) for making decisions and assessing performance as the source of determination of the Company’s reportable segments. The Company’s CODM, the Chief Executive Officer, reviews financial information presented on a consolidated basis for the purpose of making operating decisions and assessing financial performance. The CODM uses net income as the measure of profit or loss to allocate resources and assess performance. The CODM regularly reviews net income as reported on the Company’s consolidated statements of operations. Financial forecasts and budget to actual results used by the CODM to assess performance and allocate resources, as well as those used for strategic decisions related to headcount and capital expenditures are also reviewed on a consolidated basis. The CODM considers the impact of the significant segment expenses in the table below on net income when deciding whether to reinvest profits, propose share repurchase, or pursue strategic mergers and acquisitions. The measure of segment assets is reported on the balance sheet as total assets. The CODM does not review segment assets at a level other than that presented in the Company’s consolidated balance sheets. The table below presents the Company’s consolidated operating results including significant segment expenses:
Depreciation expense is a significant expense related to research and development expenses, sales and marketing expenses and general and administrative expenses as shown above. For the fiscal years ended January 3, 2026, December 28, 2024, and December 30, 2023 depreciation expense was $21.0 million, $12.9 million and $12.4 million, respectively. The following table lists the different sources of revenue:
The Company’s significant operations outside the United States include sales, service and application offices in Asia and Europe. For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped. Revenue by geographic region is as follows:
The following customers represented 10% or more of the Company’s total revenue for the respective years:
One customer’s accounts receivable balance was individually greater than 10% of accounts receivable at January 3, 2026, representing approximately 12% of the Company’s total accounts receivable. Two customers’ accounts receivable balances were individually greater than 10% of accounts receivable at December 28, 2024, representing, in the aggregate approximately 47% of the Company’s total accounts receivable. Substantially all of the Company’s long-lived assets are located within the United States of America. |
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Earnings Per Share |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share | Earnings Per Share: Basic earnings per share is calculated using the weighted average number of shares of common stock outstanding during the period. Restricted stock units and stock options are included in the calculation of diluted earnings per share, except when their effect would be anti-dilutive. For the fiscal year ended January 3, 2026 the weighted average number of restricted stock units excluded from the computation of diluted earnings per share was 70 thousand. Anti-dilutive shares for the fiscal years ended December 28, 2024, and December 30, 2023, were immaterial.
The Company’s basic and diluted earnings per share amounts are as follows:
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Share Repurchase Authorization |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share Repurchase Program [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share Repurchase Authorization | Share Repurchase Authorization: In February 2024, the Onto Innovation Board of Directors approved a share repurchase authorization, which allows the Company to repurchase up to $200 million worth of shares of its common stock. Repurchases may be made through both public market and private transactions from time to time with shares purchased being subsequently retired. During the twelve months ended January 3, 2026, the Company repurchased and retired 492 thousand shares of its common stock under this repurchase authorization. At January 3, 2026, there was $99.9 million available for future share repurchases under this share repurchase authorization. The following table summarizes the Company’s stock repurchases:
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Restructuring |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring Charges [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring and Related Activities Disclosure [Text Block] | Restructuring From time to time, the Company approves restructuring plans, which include workforce reductions, to streamline operations and align the Company’s cost structure with its business outlook. These restructuring plans may result in charges to cost of goods sold for streamlining of certain manufacturing activities or for inventory write-downs primarily related to the exit of older product lines. Charges to operating expenses primarily include employee severance costs that are paid during the period incurred, and charges for streamlining of certain operating activities. Restructuring expenses recorded in the Consolidated Statements of Operations are as follows:
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Pay vs Performance Disclosure - USD ($) $ in Thousands |
12 Months Ended | ||
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Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
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| Pay vs Performance Disclosure | |||
| Net Income (Loss) | $ 136,759 | $ 201,670 | $ 121,159 |
Insider Trading Arrangements |
12 Months Ended |
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Jan. 03, 2026 | |
| Trading Arrangements, by Individual | |
| Material Terms of Trading Arrangement | Rule 10b5-1 Plan Elections During the fiscal quarter ended January 3, 2026, none of our directors or officers (as defined in Rule 16a-1 under the Exchange Act) adopted, modified or terminated a “Rule 10b5-1 trading arrangement” or “non-Rule 105b-1 trading arrangement” (as those terms are defined in Item 408 of Regulation S-K). |
| Rule 10b5-1 Arrangement Adopted | false |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
Schedule of Valuation and Qualifying Accounts |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Valuation and Qualifying Accounts Disclosure | SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS (In thousands)
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Summary of Significant Accounting Policies (Policies) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Consolidation | Consolidation. The consolidated financial statements reflect the accounts of the Company and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated. The Company has prepared these consolidated financial statements in conformity with generally accepted accounting principles in the U.S. (“GAAP”). | |||||||||||||||||||||||||||||||||||||||||||||
| Fiscal Year | Fiscal Year. Through fiscal 2025, the Company operated on a 52- or 53-week fiscal year ending on the Saturday closest to December 31. The fiscal year of 2025 was a 53-week fiscal year that began on December 29, 2024 and ended January 3, 2026. The fiscal year of 2024 was a 52-week fiscal year that began on December 31, 2023 and ended December 28, 2024. The fiscal year of 2023 was a 52-week fiscal year that began on January 1, 2023 and ended December 30, 2023. On February 18, 2026, the Board of Directors changed the Company’s fiscal year from a 52-53 week fiscal year ending on the Saturday closest to December 31 to a December 31 fiscal year-end beginning with the fiscal year ending on December 31, 2026 |
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| Revenue Recognition | Revenue Recognition. Revenue is recognized when control of the promised goods or services is transferred to the Company’s customers in an amount that reflects the consideration the Company expects to be entitled to receive in exchange for those goods or services. The Company accounts for a contract when it has approval and commitment from both parties, the rights of the parties and payment terms are identified, the contract has commercial substance and collectability of consideration is reasonably assured. The Company accounts for shipping and handling activities as the fulfillment of a promise to transfer goods to the customer and therefore records these activities under the caption “Cost of revenue.” Sales tax and any other taxes collected concurrent with revenue producing activities are excluded from revenue. Incidental items that are immaterial in the context of the contract are recognized as expense. Contracts with customers may include multiple performance obligations. For such arrangements, the Company allocates revenue to each performance obligation based on its relative standalone selling price. The Company generally determines standalone selling prices based on the prices charged to customers or the expected cost-plus margin. Systems and Software Revenue Revenue from systems is recognized when the Company transfers control of the product to the customer. To indicate transfer of control, the Company must have a present right to payment, legal title must have passed to the customer and the customer must bear the significant risks and rewards of ownership. The Company generally transfers control for system sales when the customer or the customer’s agent picks up the system at the Company’s facility. The Company provides an assurance warranty on its systems for a period of to fourteen months against defects in material and workmanship. The Company provides for the estimated cost of product warranties at the time revenue is recognized. Depending on the terms of the systems arrangement, the Company may also defer the recognition of a portion of the consideration expected to be received because the Company has to satisfy a future obligation (e.g., installation and extended warranties). The Company uses an observable price to determine the standalone selling price for separate performance obligations or a cost-plus margin approach when one is not available. Revenue from software licenses provides the customer with a right to use the software as it exists when made available to the customer. Revenue from software licenses, which is primarily sold with our systems, is recognized upfront at the point in time when the software is made available to the customer. Revenue from licensing support and maintenance is recognized as the support and maintenance are provided, which is over the contract period. Parts Revenue Revenue from parts is recognized when the Company transfers control of the product, which typically occurs when the Company ships the product from its facilities to the customer. Services Revenue Revenue from services primarily consists of service contracts, which provide additional maintenance coverage beyond the Company’s assurance warranty on its products, service labor, consulting and training. Revenue from service contracts is recognized ratably over the term of the service contract. Revenue from service labor and consulting is recognized as services are performed. Revenue from installation services is recognized at a point in time when installation is complete. Practical Expedients The Company generally expenses sales commissions when incurred because the amortization period is one year or less. These costs are recorded within selling, general and administrative expenses. The Company applies the practical expedient outlined in ASC 606-40-32-18 which allows the company not to adjust promised consideration for the effects of a significant financing component if the payment terms are one year or less. The Company does not disclose the value of remaining performance obligations for contracts with an original expected length of one year or less and contracts for which the Company recognizes revenue in the amount to which it has the right to invoice. For additional information on the Company’s revenue recognition, see Note 10 of Notes to the Consolidated Financial Statements. |
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| Business Combinations | Business Combinations. The Company accounts for business combinations under the acquisition method of accounting, which requires the Company to recognize separately from goodwill the assets acquired, and the liabilities assumed at their acquisition date fair values. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date as well as contingent consideration, where applicable, the Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recognized in its consolidated statements of operations. Accounting for business combinations requires the Company’s management to make significant estimates and assumptions, especially at the acquisition date including its estimates for intangible assets, contractual obligations assumed, restructuring liabilities, pre-acquisition contingencies, and contingent consideration, where applicable. Although the Company believes the assumptions and estimates it has made in the past have been reasonable and appropriate, they are based, in part, on historical experience and information obtained from the management of the acquired companies and are inherently uncertain. Estimates in valuing certain acquired intangible assets under the income approach include growth in future expected cash flows from product sales, acquired technologies, technology obsolescence rates, estimated cash flows from the projects when completed and discount rates. Unanticipated events and circumstances may occur that may affect the accuracy or validity of such assumptions, estimates or actual results. For additional information on the Company’s business combinations, see Note 3 of these Notes to the Consolidated Financial Statements. |
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| Use of Estimates | Use of Estimates. The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates made by management include the allowance for credit losses, excess and obsolete inventory, fair value of assets acquired and liabilities assumed in a business combination, recoverability and useful lives of property, plant and equipment and identifiable intangible assets, recoverability of goodwill, recoverability of deferred tax assets, liabilities for product warranty, contingencies, including litigation reserves and share-based payments and liabilities for tax uncertainties. Actual results could differ from those estimates. These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of performance stock awards, goodwill, identifiable intangible and certain tangible assets acquired. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material. |
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| Cash and Cash Equivalents | Cash and Cash Equivalents. Cash and cash equivalents include cash and highly liquid debt instruments with original maturities of three months or less when purchased. |
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| Marketable Securities | Marketable Securities. The Company determined that its investment securities are to be classified as available-for-sale. Available-for-sale debt securities are carried at fair value, with the unrealized gains and losses reported in stockholders’ equity under the caption “Accumulated other comprehensive loss.” Realized gains and losses and interest and dividends on available-for-sale securities are included in interest income and other, net. Available-for-sale securities are classified as current assets regardless of their maturity date if they are available for use in current operations. The Company reviews its investment portfolio to identify and evaluate investments that have indications of possible impairment. Factors considered in determining whether a loss is other-than-temporary include the length of time and extent to which fair value has been less than the cost basis, credit quality and the Company’s ability and intent to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. When a decline in fair value is determined to be other-than-temporary, unrealized losses on available-for-sale securities are charged against earnings. The specific identification method is used to determine the gains and losses on marketable securities. For additional information on the Company’s marketable securities, see Note 5 of Notes to the Consolidated Financial Statements. |
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| Allowance for Credit Losses | Allowance for Credit Losses. The Company maintains an allowance for credit losses that is estimated based on a combination of factors including write-off history, aging analysis, forecast of future economic conditions and any specific known troubled accounts. The Company believes the allowance is adequate to cover expected losses on trade receivables. Provisions for expected credit losses are classified as selling, general and administrative expense in the Consolidated Statements of Operations. If the financial condition of the Company’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. |
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| Inventories | Inventories. Inventories are stated at the lower of cost or net realizable value. Net realizable value is the estimated selling prices in the ordinary course of business, less predictable costs of completion, disposal and transportation. Cost is generally determined on a first-in, first-out basis, and includes material, labor and manufacturing overhead costs. The Company reviews and sets standard costs as needed, but at a minimum, on an annual basis, at current manufacturing costs in order to approximate actual costs. The Company evaluates inventories for excess quantities and obsolescence. The Company establishes inventory reserves when conditions exist that suggest that inventory may be in excess of anticipated demand or is obsolete based upon assumptions about historical and future demand for the Company’s products and market conditions. In addition, inventories are evaluated for potential obsolescence due to the effect of known and anticipated engineering design changes. Once a reserve has been established, it is maintained until the item to which it relates is scrapped or sold. The Company regularly evaluates its ability to realize the value of inventory based on a combination of factors including the following: historical usage rates, forecasted sales, product end-of-life dates, estimated current and future market values and new product introductions. When recorded, reserves are intended to reduce the carrying value of the Company’s inventory to its net realizable value. If actual demand for the Company’s products deteriorates, or market conditions are less favorable than those that the Company projects, additional reserves may be required. |
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| Property, Plant and Equipment | Property, Plant and Equipment. Property, plant and equipment are stated at cost. Depreciation of property, plant and equipment is computed using the straight-line method over the estimated useful lives of the assets, which are to twenty-two years for buildings, to ten years for machinery and equipment, to ten years for furniture and fixtures, three years for computer equipment, and to ten years for software. Leasehold improvements are amortized using the straight-line method over the lesser of the lease term or the estimated useful life of the related asset. Repairs and maintenance costs are expensed as incurred and major renewals and betterments are capitalized. |
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| Long-Lived Assets and Finite-Lived Acquired Intangible Assets | Long-Lived Assets and Finite-Lived Acquired Intangible Assets. Long-lived assets, such as property, plant, and equipment, and identifiable acquired intangible assets with finite useful lives, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount of an asset exceeds its estimated future cash flows, an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds the fair value of the asset, which is generally based on discounted cash flows. | |||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Indefinite Lived Intangible Assets | Goodwill and Indefinite Lived Intangible Assets. Goodwill and indefinite lived intangible assets are tested for impairment on an annual basis or when an event or changes in circumstances indicate that its carrying value may not be recoverable. Goodwill impairment is tested at the reporting unit level, which is defined as an operating segment or one level below the operating segment. The Company has one reporting unit and one operating segment. No goodwill impairment occurred in fiscal years 2025, 2024, or 2023. Goodwill is reviewed for impairment using either a qualitative assessment or a quantitative goodwill impairment test. If the Company chooses to perform a qualitative assessment and determine the fair value more likely than not exceeds the carrying value, no further evaluation is necessary. When the Company performs the quantitative goodwill impairment test, it compares fair value to carrying value, which includes goodwill. If fair value exceeds carrying value, the goodwill is not considered impaired. If the carrying value is higher than the fair value, the difference would be recognized as an impairment loss. Intangible assets with indefinite lives, including in-process research and development (“IPR&D”), are tested for impairment if impairment indicators arise and, at a minimum, annually. However, the Company is permitted to first assess qualitative factors to determine if a quantitative impairment test is necessary. Further testing is only required if the entity determines, based on the qualitative assessment, that it is more likely than not that an indefinite-lived intangible asset’s fair value is less than its carrying amount. Otherwise, no further impairment testing is required. The indefinite-lived intangible asset impairment test consists of a one-step analysis that compares the fair value of the intangible asset with its carrying amount. If the carrying amount of an intangible asset exceeds its fair value, an impairment loss is recognized in an amount equal to that excess. The Company considers many factors in evaluating whether the value of intangible assets with indefinite lives may not be recoverable, including, but not limited to estimates of future cash flows, the discount rate, terminal growth rates, general economic conditions, our outlook and market performance of our industry and recent and forecasted financial performance. For additional information on the Company’s goodwill and purchased intangible assets, see Note 6 of Notes to the Consolidated Financial Statements. |
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| Concentration of Credit Risk | Concentration of Credit Risk. Financial instruments, which potentially subject the Company to concentrations of credit risk, consist primarily of accounts receivable, cash and cash equivalents and marketable securities. The Company maintains cash and cash equivalents and marketable securities with higher credit quality issuers and monitors the amount of credit exposure to any one issuer. The Company’s investment policy provides guidelines and limits regarding credit quality, investment concentration, investment type, and maturity that the Company believes will provide liquidity while reducing risk of loss of capital. Investments are of a short-term nature and include investments in commercial paper, corporate debt securities, asset-backed securities, U.S. Treasury, U.S. Government, and U.S. Agency debt. The Company’s accounts receivable result primarily from the sale of semiconductor equipment, related accessories and replacement parts. The Company’s customer base is highly concentrated and historically, a relatively small number of customers have accounted for a significant portion of its receivables. Write-offs of uncollectible accounts have historically not been material. The Company actively monitors its customers’ financial strength to reduce the risk of loss. |
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| Warranties | Warranties. The Company generally provides a warranty on its products for a period of twelve to fourteen months against defects in material and workmanship. The Company accrues for the estimated cost of product warranties at the time revenue is recognized. The estimated future warranty obligations are affected by the warranty periods, sales volumes, product failure rates, material usage and labor and replacement costs incurred in correcting a product failure. If actual product failure rates, material usage, labor or replacement costs differ from the Company’s estimates, revisions to the estimated warranty obligations would be required. The warranty accrual represents the best estimate of the amount necessary to settle future and existing claims on products sold as of the balance sheet date. The Company periodically assesses the adequacy of its recorded warranty reserve and adjusts the amounts in accordance with changes in these factors. |
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| Income Taxes | Income Taxes. The Company accounts for income taxes using the asset and liability approach for deferred taxes which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in the Company’s consolidated financial statements or tax returns. A valuation allowance is recorded to reduce a deferred tax asset to the portion which more likely than not will be realized. For additional information on the Company’s income taxes, see Note 13 of Notes to the Consolidated Financial Statements. |
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| Translation of Foreign Currencies | Translation of Foreign Currencies. The Company’s international branches and subsidiaries primarily generate and expend cash in their local functional currency. Accordingly, all balance sheet accounts of these local functional currency branches and subsidiaries are translated into U.S. dollars at the fiscal period-end exchange rate, and income and expense accounts are translated into U.S. dollars using average rates in effect for the period. The resulting translation adjustments are recorded as cumulative translation adjustments and are recorded directly as a separate component of stockholders’ equity under the caption, “Accumulated other comprehensive loss.” The Company had accumulated exchange losses resulting from the translation of foreign operation financial statements of $11.0 million and $14.5 million as of January 3, 2026 and December 28, 2024, respectively. |
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| Share-based Compensation | Share-based Compensation. The Company measures the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. Compensation expense is recognized using the straight-line attribution method to recognize share-based compensation over the service period of the award, with adjustments recorded for forfeitures as they occur. For additional information on the Company’s share-based compensation plans, see Note 11 of Notes to the Consolidated Financial Statements. |
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| Research and Development Costs | Research and Development Costs. Expenditures for research and development are expensed as incurred. |
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| Derivative Instruments and Hedging Activities | Derivative Instruments and Hedging Activities. The Company’s policy is to mitigate the effect of exchange rate fluctuations on certain foreign currency denominated business exposures. The Company has a policy that allows for the use of derivative financial instruments to hedge foreign currency exchange rate fluctuations on forecasted revenue and net monetary assets or liabilities denominated in various foreign currencies. The Company carries derivative financial instruments (derivatives) on the balance sheet at their fair values, in either prepaid expenses and other current assets or other current liabilities in the Consolidated Balance Sheets. The Company does not use derivatives for trading or speculative purposes. The Company does not believe that it is exposed to more than a nominal amount of credit risk in its foreign currency hedges, as counterparties are large, global and well-capitalized financial institutions. The Company’s exposures are in liquid currencies (Japanese yen, euros, Korean won, Taiwanese dollars, Chinese renminbi and Singapore dollars), so there is minimal risk that appropriate derivatives to maintain the Company’s hedging program would not be available in the future. To hedge foreign currency risks, the Company uses foreign currency exchange forward contracts, where possible and prudent. These hedge contracts are valued using standard valuation formulas with assumptions about future foreign currency exchange rates derived from existing exchange rates, interest rates, and other market factors. The dollar equivalent of the U.S. dollar forward contracts and related fair values as of January 3, 2026 and December 28, 2024 were as follows:
During the years ended January 3, 2026 and December 28, 2024, the Company recognized losses of million and million on maturities of forward contracts, respectively. During the year ended December 30, 2023, the Company recognized a gain of million on maturities of forward contracts. The aggregate notional amounts of matured contracts were $485.6 million, $423.4 million and $319.4 million for 2025, 2024 and 2023, respectively. |
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| Contingencies and Litigation | Contingencies and Litigation. The Company is subject to the possibility of losses from various contingencies, including certain legal proceedings, lawsuits and other claims. The Company accrues for a loss contingency when it concludes that the likelihood of a loss is probable and the amount of the loss can be reasonably estimated. If the Company concludes that loss contingencies that could be material to any one of its financial statements are not probable, but are reasonably possible, or are probable, but cannot be estimated, then the Company discloses the nature of the loss contingencies, together with an estimate of the range of possible loss or a statement that such loss is not reasonably estimable. The Company expenses as incurred the costs of defending legal claims against the Company. The Company does not recognize gain contingencies until realized. See Note 9 of the Notes to the Consolidated Financial Statements, “Commitments and Contingencies” for a detailed description. |
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| Recent Accounting Pronouncements | Recent Accounting Pronouncements. Recently Adopted or Effective In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which requires public entities to disclose consistent categories and greater disaggregation of information in the rate reconciliation and for income taxes paid. It also includes certain other amendments to improve the effectiveness of income tax disclosures. The guidance is effective for financial statements issued for annual periods beginning after December 15, 2024, with early adoption permitted. The Company applied the amendments prospectively for the fiscal year ended January 3, 2026, and the impact of the adoption of the amendments in this update was not material to the Company’s consolidated financial position and results of operations for the fiscal year ended January 3, 2026, since the amendments require only enhancement of existing income tax disclosures in the footnotes to the Company’s consolidated financial statements. Updates Not Yet Effective In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements,” to clarify and reorganize U.S. GAAP interim reporting guidance to improve navigability, applicability, and consistency without changing the fundamental nature or volume of required interim disclosures. This amendment clarifies when ASC 270 is applicable, establishes a disclosure principle requiring disclosure of material events or changes occurring since the most recent annual reporting period, and consolidates into ASC Topic 270 a comprehensive list of interim disclosures required by other Codification Topics. The amendment also clarifies the form and content of interim financial statements, including guidance for condensed interim reporting. The amendment is effective for the Company for interim periods in 2028, with early adoption permitted. The impact of the adoption of the amendments in this update is not expected to be material to the Company’s consolidated financial position and results of operations. In December 2025, the FASB issued ASU 2025‑10, “Government Grants (Topic 832): Accounting for Government Grants Received by Business Entities,” to establish specific guidance for the recognition, measurement, presentation, and disclosure of government grants received to reduce diversity and increase consistency amongst business entities in accounting for such grants. This amendment amends Accounting Standards Codification “ASC” Topic 832 to require that a government grant received by a business entity should not be recognized as income until it is probable that a business entity will comply with the conditions attached to the grant and the grant will be received, with any grant related to an asset to be purchased, constructed or acquired such as long-lived assets or inventory to be recognized on the balance sheet as either deferred income or as an adjustment to the cost basis of the related asset, or the cost accumulation approach, as such costs are incurred. Any grant income or deferred income shall be recognized in earnings on a systematic and rational basis over the periods in which a business entity recognizes as expenses the costs for which the grant is intended to compensate, whereas any grants accounted for using the cost accumulation approach will not have a direct subsequent recognition in earnings, but rather reduced depreciation or amortization in accounting for the related asset. Entities are also required to present grants recognized in earnings separately under other income or deducted from the related expense, and provide disclosures of the nature of the government grant received, the accounting policies used to account for the grant, and the significant terms and conditions of the grant. The amendment is effective for the Company for annual and interim periods in 2029, with early adoption and multiple transition methods permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In December 2025, the FASB issued ASU 2025-09, “Derivatives and Hedging (Topic 815): Hedge Accounting Improvements,” to amend certain aspects of its hedge accounting guidance to better reflect an entity’s risk management activities in the financial statements. The guidance expands the hedged risks permitted to be aggregated in a group of individual forecasted transactions and increases the variable price components eligible to be designated as the hedged risk in the forecasted purchase or sale of nonfinancial assets. For public business entities, the provisions of ASU 2025-09 are effective for fiscal years beginning after December 15, 2026. Early adoption is permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, “Intangibles-Goodwill and Other-Internal Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which removes all references to software development stages and clarifies the threshold entities apply to begin capitalizing costs. ASU 2025-06 is effective for annual periods beginning after December 15, 2027 and interim reporting periods within those annual reporting periods. The ASU may be applied prospectively, retrospectively or through a modified transition approach with early adoption permitted. The Company is currently evaluating the potential impact of this standard on its consolidated financial statements. In July 2025, the FASB issued ASU 2025-05, “Financial Instruments - Credit Losses (Topic 326),” which simplifies the estimation of credit losses on current accounts receivable and current contract assets arising from transactions accounted for under Accounting Standards Codification 606, Revenue from Contracts with Customers. The guidance allows all entities to use a practical expedient to assume that the current conditions as of the balance sheet date will remain unchanged for the remaining life of the asset when developing a reasonable and supportable forecast as part of estimating expected credit losses on these assets. The guidance is effective for fiscal years beginning after December 15, 2025, and interim periods within those fiscal years. Early adoption is permitted. Entities that elect the practical expedient are required to apply the amendments prospectively. The Company does not expect the adoption of this guidance to have a material impact on its consolidated financial statements. In November 2024, the FASB issued ASU 2024-03, “Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Subtopic 220-40),” which requires additional disclosure of certain costs and expenses, including inventory purchases, employee compensation, selling expense and depreciation expense within the notes to financial statements. The guidance is effective for annual periods beginning after December 15, 2026, and interim periods within fiscal years beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact that the updated standard will have on its financial statements and related disclosures. |
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Summary of Significant Accounting Policies (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||
| Summary Of Significant Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||
| Forward Contracts and Related Fair Values | The dollar equivalent of the U.S. dollar forward contracts and related fair values as of January 3, 2026 and December 28, 2024 were as follows:
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Business Combination (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] | The following table sets forth the preliminary amounts, allocated to the intangible assets identified and their estimated useful lives as of the Acquisition Date:
The developed technology intangible assets were valued using the relief-from-royalty method under the income approach, which estimates value based on the royalty a market participant would pay to license the technology. Under this approach, the after‑tax royalty savings attributable to ownership represent the economic benefit of the asset. The key assumptions used in the valuation included the estimated royalty rate, projected revenue attributable to the developed technology, the expected useful life of the asset, and a discount rate reflecting the risks associated with the projected cash flows. The assets are amortized on a straight‑line basis over their estimated 7‑year useful life, which approximates the expected pattern of economic benefits. |
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| Business Combination, Pro Forma Information [Table Text Block] | The unaudited pro forma financial information presented below was derived from historical financial records of Onto and Semilab USA and presents the operating results for the periods presented as if the Acquisition occurred on January 1, 2024. The pro forma results include adjustments to adjust for the impact of purchase accounting adjustments including amortization and depreciation expense, and the related tax effects. Accordingly, the following unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the Acquisition had occurred at the beginning of 2024, nor are they indicative of future results of operations:
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| Business Combination, Consideration Transferred [Table Text Block] | The preliminary Acquisition Date fair value of consideration transferred consisted of the following:
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| SemilabUSAMember | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Table Text Block] | The following table summarizes the preliminary purchase price allocation of the fair values of the assets acquired and liabilities assumed:
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Fair Value Measurements - (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis | The following table provides the assets carried at fair value measured on a recurring basis at January 3, 2026 and December 28, 2024:
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Marketable Securities - (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Marketable Securities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Marketable Securities by Category | At January 3, 2026 and December 28, 2024, marketable securities are categorized as follows:
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| Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date | The amortized cost and estimated fair value of marketable securities classified by the maturity date listed on the security, regardless of the Consolidated Balance Sheet classification, is as follows at January 3, 2026 and December 28, 2024:
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| Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] | The following table summarizes the estimated fair value and gross unrealized holding losses of marketable securities, aggregated by investment instrument and period of time in an unrealized loss position, at January 3, 2026 and December 28, 2024.
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Goodwill and Purchased Intangible Assets - (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Changes in the Carrying Amount of Goodwill | Goodwill The changes in the carrying amount of goodwill are as follows:
The $314.0 million of goodwill acquired in 2025 resulted from the purchase of Semilab USA, See Note 3, “Business Combination,” for further details. |
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| Schedule of Purchased Intangible Assets | Purchased intangible assets as of January 3, 2026 and December 28, 2024 are as follows:
During the fiscal year ended January 3, 2026, the Company disposed of fully amortized identifiable intangible assets whose gross carrying value totaled $117 million. There were no disposals of identifiable intangible assets during the fiscal year ended December 28, 2024. During the fiscal year ended January 3, 2026, the Company acquired $210.0 million of identifiable intangible assets resulted from the purchase of Semilab USA, See Note 3, “Business Combination,” for further details. |
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Leasing Arrangements (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lessee Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Maturity of Lease Liabilities | As of January 3, 2026, there was an insignificant amount of commitments for operating leases that have not yet commenced. The reconciliation of the maturities of operating leases to the lease liabilities recorded on the Consolidated Balance Sheet as of January 3, 2026 is as follows:
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| Lease Terms | The Company accounts for the lease and non-lease components as a single lease component.
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| Suplemental cashflows lease | Supplemental cash flows information related to leases was as follows:
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Balance Sheet Components (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Balance Sheet Components [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Inventories | Inventories are comprised of the following:
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| Schedule of Property, Plant and Equipment, Net | Property, plant and equipment, net, is comprised of the following:
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| Schedule of Other Assets | Other assets Other assets is comprised of the following:
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| Schedule of Accrued Liabilities | Accrued liabilities is comprised of the following:
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| Schedule of Other Current Liabilities | Other current liabilities is comprised of the following:
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| Schedule of Other Non-Current Liabilities | Other non-current liabilities is comprised of the following:
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Commitments and Contingencies (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Changes in Warranty Reserves | Changes in the Company’s warranty reserves are as follows:
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Revenue (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Disaggregation of Revenue | The following table represents a disaggregation of revenue by timing of revenue:
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| Schedule of Changes in Deferred Revenue | Changes in deferred revenue were as follows:
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Share-Based Compensation and Employee Benefit Plans (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Share-based Compensation Expense by Type of Award | Share-based compensation was allocated in the Company’s Consolidated Statement of Operations as follows:
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| Summary of Service-Based RSUs and Market-Based PRSUs Activity | The following table summarizes the Company’s combined service-based RSUs and market-based PRSUs:
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| Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] | The Company granted the following restricted stock units (“RSUs” and each, an “RSU”) and market-based performance restricted stock units (“PRSUs” and each, a “PRSU”):
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Other Income (Expense), Net (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Income Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Other Income (Expense), Net | Other expense, net is comprised of the following:
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Income Taxes (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Components of Income Tax Expense | The components of income tax expense are as follows:
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| Income before Tax | ncome before provision for income taxes is comprised of the following:
Beginning with its 2025 annual reporting, the Company adopted ASU 2023‑09 on a prospective basis. As a result of this adoption, the Company is presenting the following rate reconciliation. The provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income tax rate of 21% for the year ended January 3, 2026, to income before provision for income taxes as follows:
For the years ended December 28, 2024 and December 30, 2023, prior to the Company’s adoption of ASU 2023‑09, the reconciliation of the provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income taxes rate of 21% to income before provision for income taxes as follows: |
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| Income Before Provision for Income Taxes | Beginning with its 2025 annual reporting, the Company adopted ASU 2023‑09 on a prospective basis. As a result of this adoption, the Company is presenting the following rate reconciliation. The provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income tax rate of 21% for the year ended January 3, 2026, to income before provision for income taxes as follows:
For the years ended December 28, 2024 and December 30, 2023, prior to the Company’s adoption of ASU 2023‑09, the reconciliation of the provision for income taxes differs from the amount of income tax determined by applying the applicable U.S. federal income taxes rate of 21% to income before provision for income taxes as follows:
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| Deferred Tax Assets and Liabilities | Deferred tax assets and liabilities are comprised of the following:
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| Unrecognized Tax Benefits | The total amount of unrecognized tax benefits are as follows:
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| CashPaidForIncomeTaxesNet[Table Text Block] | Cash paid for income taxes, net of refunds received, by jurisdiction pursuant to the disclosure requirements of ASU 2023-09 for the year ended January 3, 2026 is as follows:
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Accumulated Other Comprehensive (Income) Loss (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Components of Accumulated Other Comprehensive (Income) Loss, Net of Tax | The components of accumulated other comprehensive income (loss), net of tax, are as follows:
For the twelve months ended January 3, 2026, December 28, 2024 and December 30, 2023, tax effects on net income of amounts recorded in other comprehensive income (loss) were $98.5 thousand, $(36.8) thousand and $0.9 million, respectively. |
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Segment Reporting and Geographic Information - (Tables) |
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Revenue from External Customers by Products and Services | The following table lists the different sources of revenue:
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| Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area | The Company’s significant operations outside the United States include sales, service and application offices in Asia and Europe. For geographical revenue reporting, revenue is attributed to the geographic location to which the product is shipped. Revenue by geographic region is as follows:
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| Schedule of Segment Reporting Information, by Segment [Table Text Block] | The table below presents the Company’s consolidated operating results including significant segment expenses:
Depreciation expense is a significant expense related to research and development expenses, sales and marketing expenses and general and administrative expenses as shown above. For the fiscal years ended January 3, 2026, December 28, 2024, and December 30, 2023 depreciation expense was $21.0 million, $12.9 million and $12.4 million, respectively. |
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| Schedule of Revenue by Major Customer by Reporting Segments | The following customers represented 10% or more of the Company’s total revenue for the respective years:
One customer’s accounts receivable balance was individually greater than 10% of accounts receivable at January 3, 2026, representing approximately 12% of the Company’s total accounts receivable. Two customers’ accounts receivable balances were individually greater than 10% of accounts receivable at December 28, 2024, representing, in the aggregate approximately 47% of the Company’s total accounts receivable. Substantially all of the Company’s long-lived assets are located within the United States of America. |
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Earnings Per Share (Tables) |
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Jan. 03, 2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Basic and Diluted Earnings Per Share | The Company’s basic and diluted earnings per share amounts are as follows:
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Restructuring (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring Charges [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring and Related Costs [Table Text Block] | Restructuring expenses recorded in the Consolidated Statements of Operations are as follows:
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Share Repurchase Authorization (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jan. 03, 2026 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share Repurchase Program [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Stock Repurchases | The following table summarizes the Company’s stock repurchases:
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Summary of Significant Accounting Policies - Forward Contracts and Related Fair Values (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| Notional amount | $ 47,361 | $ 45,883 |
| Fair value of liability | $ (89) | $ (61) |
Business Combination (Additional Information) (Details) - USD ($) $ in Millions |
2 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jan. 03, 2026 |
Jan. 03, 2026 |
Nov. 17, 2025 |
|
| Business Combination [Abstract] | |||
| AquisitionRelatedCosts | $ 12.5 | ||
| BusinessCombinationDeferredTaxLiablityEstablished | $ 46.6 | ||
| BusinessCombinationStepUpOfInventoryFairValueRecognized | 4.0 | ||
| BusinessCombinationStepUpOfInventoryFairValueRecognizedSellThroughPeriod | 1 year | ||
| BusinessCombinationStepUpOfInventoryFairValueToBeRecognized | $ 9.1 | ||
| BusinessCombinationOperatingLoss | $ 6.2 | ||
| BusinessCombinationRevenue | $ 8.6 |
Business Combination - Consideration Transfered (Details) - SemilabUSAMember $ in Thousands |
Nov. 17, 2025
USD ($)
|
|---|---|
| Business Combination, Consideration Transferred [Line Items] | |
| BusinessCombinationConsiderationTransferred | $ 526,641 |
| BusinessCombinationConsiderationTransferredCash | 389,052 |
| BusinessCombinationConsiderationTransferredEquity | 81,697 |
| BusinessCombinationConsiderationTransferredLiabilitiesSettled | $ 55,892 |
Business Combination - Business Combination Pro Forma (Details) - SemilabUSAMember - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Business Combination Pro Forma [Line Items] | ||
| Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax | $ 132,348 | $ 182,718 |
| Business Combination, Pro Forma Information, Pro Forma Revenue | $ 1,087,054 | $ 1,077,043 |
Marketable Securities - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities Classified by Maturity Date (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract] | ||
| Amortized Cost, Due within one year | $ 232,516 | $ 432,088 |
| Amortized Cost, Due after one through five years | 60,133 | 140,917 |
| Amortized Cost, Due after five through ten years | 0 | 235 |
| Amortized Cost, Due after ten years | 0 | 65,740 |
| Amortized Cost | 292,649 | 638,980 |
| Fair Value, Due within one year | 233,043 | 432,616 |
| Fair Value, Due after one through five years | 60,460 | 140,792 |
| Fair Value, Due after five through ten years | 0 | 235 |
| Fair Value, Due after ten years | 0 | 65,740 |
| Fair Value, Total marketable securities | $ 293,503 | $ 639,383 |
Goodwill and Purchased Intangible Assets - Textual (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Impairment charge | $ 0 | ||
| DisposedOfFullyAmortiziedIdentifiableIntangibleAssetsGrossCarryingValue | 117,000,000 | $ 0 | |
| Amortization of intangibles | 39,409,000 | $ 49,437,000 | $ 54,822,000 |
| Estimated amortization expense, 2026 | 77,600,000 | ||
| Estimated amortization expense, 2027 | 55,400,000 | ||
| Estimated amortization expense, 2028 | 42,500,000 | ||
| Estimated amortization expense, 2029 | 35,200,000 | ||
| Estimated amortization expense, 2030 | $ 35,100,000 | ||
Goodwill and Purchased Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Goodwill [Line Items] | ||
| Beginning balance | $ 329,980 | $ 315,811 |
| Goodwill adjustments | 57 | 0 |
| Ending balance | 644,015 | 329,980 |
| Lumina Instruments Inc [Member] | ||
| Goodwill [Line Items] | ||
| Goodwill, Acquired During Period | $ 14,169 | |
| SemilabUSAMember | ||
| Goodwill [Line Items] | ||
| Goodwill, Acquired During Period | $ 313,978 | |
Leasing Arrangements - Textual (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Lessee Disclosure [Abstract] | ||
| Operating lease, term of contract | 1 year | |
| Operating lease cost | $ 7.0 | $ 6.4 |
Leasing Arrangements - Summary of Cash Flow Information (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Lessee Disclosure [Abstract] | ||
| Cash paid for operating lease liabilities | $ 7,031 | $ 6,372 |
| Right-of-use assets obtained in exchange for operating lease liabilities | $ 9,054 | $ 1,334 |
Leasing Arrangements - Summary of Operating Lease Information (Details) |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Lessee Disclosure [Abstract] | ||
| Weighted average remaining lease term | 3 years 7 months 6 days | 3 years 6 months |
| Weighted average discount rate | 5.50% | 5.10% |
Leasing Arrangements - Summary of Maturity of Lease Liabilities (Details) $ in Thousands |
Jan. 03, 2026
USD ($)
|
|---|---|
| Lessee Disclosure [Abstract] | |
| 2026 | $ 7,080 |
| 2027 | 4,475 |
| 2028 | 3,959 |
| 2029 | 2,612 |
| 2030 | 984 |
| Thereafter | 660 |
| Total undiscounted operating lease payments | 19,770 |
| Less: imputed interest | 2,296 |
| Present value of operating lease liabilities | $ 17,474 |
| Operating Lease, Liability, Statement of Financial Position [Extensible List] | Total undiscounted operating lease payments |
Balance Sheet Components - Schedule of Inventories (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Inventory Details [Abstract] | ||
| Materials | $ 208,061 | $ 176,814 |
| Work-in-process | 59,764 | 91,672 |
| Finished goods | 30,439 | 18,493 |
| Total inventories | $ 298,264 | $ 286,979 |
Balance Sheet Components - Schedule of Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 211,516 | $ 190,141 |
| Accumulated depreciation | (84,332) | (66,273) |
| Total property, plant and equipment, net | 127,184 | 123,868 |
| Land and building [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | 47,770 | 46,583 |
| Machinery and equipment [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | 95,151 | 86,317 |
| Furniture and fixtures [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | 3,920 | 4,081 |
| Computer equipment and software [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | 40,635 | 32,755 |
| Leasehold improvements [Member] | ||
| Property Plant And Equipment [Line Items] | ||
| Property, plant and equipment, gross | $ 24,040 | $ 20,405 |
Balance Sheet Components - Schedule of Other Assets (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Other Assets [Abstract] | ||
| Operating lease right-of-use assets | $ 16,249 | $ 13,939 |
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Total other assets | Total other assets |
| Other | $ 10,296 | $ 1,514 |
| Total other assets | $ 26,545 | $ 15,453 |
Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Accrued Liabilities, Current [Abstract] | ||
| Payroll and related expenses | $ 38,443 | $ 39,850 |
| Warranty | 10,041 | 10,075 |
| Other | 60 | 49 |
| Total accrued liabilities | $ 48,544 | $ 49,974 |
Balance Sheet Components - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Other Liabilities, Current [Abstract] | ||
| Customer deposits | $ 7,352 | $ 10,700 |
| Current operating lease obligations | $ 6,217 | $ 5,416 |
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Total other current liabilities | Total other current liabilities |
| Income tax payable | $ 5,256 | $ 8,492 |
| Accrued professional fees | 3,954 | 618 |
| Other accrued taxes | 2,851 | 839 |
| Other | 5,306 | 3,961 |
| Total other current liabilities | $ 30,936 | $ 30,026 |
Balance Sheet Components - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Other Liabilities, Noncurrent [Abstract] | ||
| Non-current operating lease obligations | $ 11,258 | $ 9,743 |
| Unrecognized tax benefits (including interest) | $ 9,037 | $ 5,489 |
| Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Total non-current liabilities | Total non-current liabilities |
| Deferred revenue | $ 6,250 | $ 4,009 |
| Other | 1,202 | 1,875 |
| Total non-current liabilities | $ 27,747 | $ 21,116 |
Commitments and Contingencies - Textual (Details) |
12 Months Ended |
|---|---|
|
Jan. 03, 2026
USD ($)
| |
| Commitments And Contingencies [Line Items] | |
| Liabilities recorded for obligations | $ 0 |
| Purchase commitment, remaining minimum amount committed | 256,400,000 |
| Purchase commitment, remaining minimum amount committed less than one year | $ 248,100,000 |
| Percentage of maximum borrowing capacity of value of eligible securities | 70.00% |
| Available line of credit | $ 100,000,000 |
| Available interest rate on line of credit | 4.30% |
| Minimum [Member] | |
| Commitments And Contingencies [Line Items] | |
| Warranty period | 12 months |
| Maximum [Member] | |
| Commitments And Contingencies [Line Items] | |
| Warranty period | 14 months |
Commitments and Contingencies - Schedule of Changes in Warranty Reserves (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Balance, beginning of the period | $ 10,858 | $ 9,380 |
| Accruals | 10,976 | 12,348 |
| Warranty liability assumed from acquisition | 1,433 | 0 |
| Usage | (12,975) | (10,870) |
| Balance, end of the period | $ 10,292 | $ 10,858 |
Revenue - Schedule of Disaggregation of Revenue by Timing of Revenue (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Disaggregation Of Revenue [Line Items] | |||
| Total revenue | $ 1,005,263 | $ 987,321 | $ 815,868 |
| Transferred at Point in Time [Member] | |||
| Disaggregation Of Revenue [Line Items] | |||
| Total revenue | 935,580 | 927,368 | 761,797 |
| Transferred over Time [Member] | |||
| Disaggregation Of Revenue [Line Items] | |||
| Total revenue | $ 69,683 | $ 59,953 | $ 54,071 |
Revenue - Additional Information (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Revenue from Contract with Customer [Abstract] | ||
| Long-term deferred revenue | $ 6,250 | $ 4,009 |
| Contract with Customer, Asset, before Allowance for Credit Loss | $ 3,500 | $ 10,100 |
Revenue - Schedule of Changes in Deferred Revenue (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
|
| Deferred Revenue Disclosure [Line Items] | ||
| Balance, beginning of the period | $ 37,836 | $ 27,225 |
| Deferral of revenue | 80,877 | 76,584 |
| Revenue Recognized - Current Year | (51,476) | (48,711) |
| Revenue Recognized - Prior Period | (29,206) | (17,262) |
| Balance, ending of the period | $ 38,031 | $ 37,836 |
Other Income (Expense), Net - Schedule of Other Income (Expense), Net (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Other Income Expense [Abstract] | |||
| Foreign currency exchange gains (losses), net | $ (4,431) | $ (276) | $ (4,091) |
| Other | (565) | 131 | 239 |
| Total other income (expense), net | $ (4,996) | $ (145) | $ (3,852) |
Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Current: | |||
| Federal | $ 7,056 | $ 40,688 | $ 28,326 |
| State | 229 | 1,156 | 879 |
| Foreign | 5,993 | 3,409 | 4,647 |
| Total current | 13,278 | 45,253 | 33,852 |
| Deferred: | |||
| Federal | 13,464 | (25,287) | (22,429) |
| State | 233 | (871) | 242 |
| Foreign | (832) | (318) | (242) |
| Total deferred | 12,865 | (26,476) | (22,429) |
| Total income tax expense (benefit) | $ 26,143 | $ 18,777 | $ 11,423 |
Income Taxes - Income before Tax (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Income Tax Disclosure [Abstract] | |||
| Domestic operations | $ 142,331 | $ 207,747 | $ 107,640 |
| Foreign operations | $ 20,571 | $ 12,700 | $ 24,942 |
Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands |
Jan. 03, 2026 |
Dec. 28, 2024 |
|---|---|---|
| Deferred tax assets: | ||
| Reserves and accruals | $ 25,571 | $ 20,315 |
| Deferred revenue | 1,247 | 4,677 |
| Share-based compensation | 3,623 | 3,792 |
| Tax credit carryforward | 15,426 | 12,170 |
| Net operating losses | 1,423 | 1,618 |
| Depreciation and amortization | 266 | 162 |
| DeferredTaxAssetsDeferredExpenseCapitalizedResearchAndDevelopmentCosts | 32,636 | 48,943 |
| Operating lease liabilities | 3,277 | 2,968 |
| Other | 541 | 1,162 |
| Gross deferred tax assets | 84,010 | 95,807 |
| Less: valuation allowance | (15,426) | (12,170) |
| Total deferred tax assets after valuation allowance | 68,584 | 83,637 |
| Deferred tax liabilities: | ||
| Depreciation and amortization | (82,135) | (38,144) |
| Operating lease right of use assets | (2,963) | (2,682) |
| Other | (23) | (4) |
| Gross deferred tax liabilities | (85,121) | (40,830) |
| Net deferred tax liabilities | $ (16,537) | |
| Deferred Tax Assets, Net, Total | $ 42,807 |
Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Unrecognized Tax Benefits [Roll Forward] | |||
| Balance, beginning of the period | $ 12,995 | $ 13,142 | $ 13,010 |
| Gross increases—tax positions in prior period | 12,266 | 1,416 | 29 |
| Gross decreases—tax positions in prior period | 0 | (33) | (100) |
| Gross increases—current-period tax positions | 2,060 | 1,761 | 1,785 |
| Closure of audit/statute limitation | (1,938) | (3,291) | (1,582) |
| Balance, end of the period | $ 25,383 | $ 12,995 | $ 13,142 |
Income Taxes - Cash Paid For Income Taxes Net (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Cash Paid For Income Taxes Net [Line Items] | |||
| Income Taxes Paid, Net, Total | $ 36,039 | $ 35,505 | $ 34,104 |
| Federal [Member] | |||
| Cash Paid For Income Taxes Net [Line Items] | |||
| Income Taxes Paid, Net, Total | 29,744 | ||
| Foreign [Member] | |||
| Cash Paid For Income Taxes Net [Line Items] | |||
| Income Taxes Paid, Net, Total | 5,298 | ||
| State [Member] | |||
| Cash Paid For Income Taxes Net [Line Items] | |||
| Income Taxes Paid, Net, Total | $ 997 | ||
Accumulated Other Comprehensive Loss Textual (Additional Information) (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Accumulated Other Comprehensive Loss [Abstract] | |||
| tax effects in other comprehensive (loss) | $ 98,500 | $ (36,800) | $ 900,000 |
Segment Reporting and Geographic Information - Additional Information (Details) |
12 Months Ended | |
|---|---|---|
|
Jan. 03, 2026
Customer
Segment
|
Dec. 28, 2024
Customer
|
|
| Concentration Risk [Line Items] | ||
| Number of reportable segments | Segment | 1 | |
| Significant Customer [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member] | ||
| Concentration Risk [Line Items] | ||
| Number of major customer | Customer | 1 | 2 |
| Customer concentration risk percentage | 10.00% | 10.00% |
Segment Reporting and Geographic Information - Schedule of Revenue by Major Customer by Reporting Segments (Details) - Customer Concentration Risk [Member] |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Accounts Receivable [Member] | Customers Above 10% [Member] | |||
| Concentration Risk [Line Items] | |||
| Customer concentration risk percentage | 12.00% | 47.00% | |
| Accounts Receivable [Member] | Significant Customer [Member] | |||
| Concentration Risk [Line Items] | |||
| Customer concentration risk percentage | 10.00% | 10.00% | |
| Sales [Member] | Customer A [Member] | |||
| Concentration Risk [Line Items] | |||
| Customer concentration risk percentage | 20.00% | 23.00% | 14.00% |
| Sales [Member] | Customer B [Member] | |||
| Concentration Risk [Line Items] | |||
| Customer concentration risk percentage | 15.00% | 17.00% | 19.00% |
| Sales [Member] | Customer C [Member] | |||
| Concentration Risk [Line Items] | |||
| Customer concentration risk percentage | 14.00% | 12.00% | |
Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Earnings Per Share [Abstract] | |||
| Net Income (Loss) | $ 136,759 | $ 201,670 | $ 121,159 |
| Basic earnings per share - weighted average shares outstanding | 49,123 | 49,343 | 48,971 |
| Restricted stock units, employee stock purchase grants and stock options - dilutive shares | 150 | 317 | 347 |
| Diluted earnings per share - weighted average shares outstanding | 49,273 | 49,660 | 49,318 |
| Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 70 | ||
| Earning Per Share Basic And Diluted [Abstract] | |||
| Basic | $ 2.78 | $ 4.09 | $ 2.47 |
| Diluted | $ 2.78 | $ 4.06 | $ 2.46 |
Share Repurchase Authorization - Textual (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
Feb. 27, 2024 |
|
| Share Repurchase Program [Abstract] | ||||
| Share Repurchase Program, Authorized, Amount | $ 200.0 | |||
| Share Repurchase Program, Remaining Authorized, Amount | $ 99.9 | |||
| Stock Repurchased and Retired During Period, Shares | 492,000 | 157,000 | 46,000 | |
Share Repurchase Authorization - Summary of Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Disclosure Share Repurchase Authorization Summary Of Stock Repurchases Details [Abstract] | |||
| Shares of common stock repurchased | 492,000 | 157,000 | 46,000 |
| Cost of stock repurchased | $ 75,015 | $ 25,065 | $ 3,197 |
| Average price paid per share | $ 152.31 | $ 159.16 | $ 69.29 |
Restructuring (Additional Information) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Restructuring Charges [Abstract] | |||
| Restructuring cost in operating expenses | $ (18,424) | $ (9,009) | $ (3,572) |
| Restructuring cost in cost of goods sold | (44,965) | (14,068) | (7,027) |
| RestructuringCost | $ (63,389) | $ (23,077) | $ (10,599) |
Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 03, 2026 |
Dec. 28, 2024 |
Dec. 30, 2023 |
|
| Allowance For Doubtful Accounts [Member] | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | $ 2,585 | $ 2,659 | $ 1,572 |
| Charged to (Recovery of) Costs and Expense | 175 | 100 | 245 |
| Charged to Other Accounts (net) | 0 | 1,200 | |
| Deductions | 52 | 174 | 358 |
| Balance at End of Period | 2,462 | 2,585 | 2,659 |
| Deferred Tax Valuation Allowance [Member] | |||
| Valuation And Qualifying Accounts Disclosure [Line Items] | |||
| Balance at Beginning of Period | 12,170 | 13,960 | 11,772 |
| Charged to (Recovery of) Costs and Expense | 3,256 | 2,188 | |
| Charged to Other Accounts (net) | 0 | ||
| Deductions | 0 | ||
| Balance at End of Period | $ 15,426 | $ 12,170 | $ 13,960 |