Description of Business and Summary of Significant Accounting Policies (Policies) |
6 Months Ended |
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Jun. 30, 2026 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Basis of Presentation | Basis of Presentation The accompanying unaudited condensed consolidated financial statements include those of A10 Networks, Inc. and its subsidiaries after elimination of all intercompany accounts and transactions. We have prepared the accompanying unaudited condensed consolidated financial statements pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). As permitted under these rules and regulations, we have condensed or omitted certain financial information and footnote disclosures we normally include in our annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The unaudited condensed consolidated balance sheet as of December 31, 2025 has been derived from our audited financial statements, which are included in our 2025 Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on February 25, 2026 (the “2025 Annual Report”). These financial statements have been prepared on the same basis as our annual financial statements and, in management’s opinion, reflect all adjustments consisting only of normal recurring adjustments that are necessary for a fair presentation of our financial information. Our interim period operating results do not necessarily indicate the results that may be expected for any other interim period or for the full fiscal year. These financial statements and accompanying notes should be read in conjunction with the financial statements and accompanying notes thereto in the 2025 Annual Report.
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| Use of Estimates | Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the condensed consolidated financial statements and accompanying notes. Those estimates and assumptions affect revenue recognition and deferred revenue, the allowance for credit losses for potential uncollectible amounts, the sales return reserve, the valuation of inventory, the fair value of marketable securities, contingencies and litigation, accrued and other liabilities, deferred commissions, TrojAI and ThreatX Protect purchase price allocations and the determination of fair value of stock-based compensation. These estimates are based on information available as of the date of the condensed consolidated financial statements, therefore, actual results could differ from management’s estimates.
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| Concentration of Credit Risk and Significant Customers | Concentration of Credit Risk and Significant Customers Financial instruments that potentially subject us to concentrations of credit risk consist of cash, cash equivalents, marketable securities and accounts receivable. Our cash, cash equivalents and marketable securities are held and invested in high-credit quality financial instruments by recognized financial institutions and are subject to minimum credit risk. Our accounts receivable are unsecured and represent amounts due to us based on contractual obligations of our customers. We mitigate credit risk in respect to accounts receivable by performing periodic credit evaluations based on a number of factors, including past transaction experience, evaluation of credit history and review of the invoicing terms of the contract. We generally do not require our customers to provide collateral to support accounts receivable. Significant customers, including distribution channels and direct customers (“end-customers”), are those which represent 10% or more of our total revenue for each period presented or our gross accounts receivable balance as of each respective balance sheet date. A substantial portion of our revenue is from sales of our products and services through distribution channels, such as resellers and distributors. In the three months ended June 30, 2026 and 2025, sales through a single distribution channel represented 40% and 32% of our total revenue, respectively. In the six months ended June 30, 2026 and 2025, sales through a single distribution channel represented 39% and 25% of our total revenue, respectively.
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| Recently Adopted Accounting Guidance/Recent Accounting Pronouncements Not Yet Effective | Recently Adopted Accounting Standard In July 2025, the FASB issued ASU 2025-05 Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets, which amends ASC 326-20 to provide a practical expedient (for all entities) and an accounting policy election (for all entities, other than public business entities that elect the practical expedient) related to the estimation of expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under ASC 606. The standard should be applied prospectively, and is effective for annual periods, including interim reporting periods, beginning after December 15, 2025. The Company adopted this ASU during the first quarter of fiscal year 2026 on a prospective basis. The adoption of this ASU did not have a material impact on its consolidated financial statements. Recent Accounting Standards Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, requiring public entities to disclose additional information about specific expense categories in the notes to the consolidated financial statements on an interim and annual basis. ASU 2024-03 is effective for fiscal years beginning after December 15, 2026, and for interim periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact of adopting ASU 2024-03. 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 simplifies the capitalization guidance by removing references to software development project stage so that the guidance is neutral to different software development methods. ASU 2025-06 are effective for annual periods beginning after December 15, 2027, and interim reporting periods within those annual reporting periods and are to be applied on a prospective, modified retrospective or retrospective basis, with early adoption permitted. The Company's interim and annual reporting requirements will be effective for the Company beginning in the first quarter of fiscal year 2028. We are in the process of analyzing the impact of adopting ASU 2025-06 on our consolidated financial statements. There have been no other recent accounting pronouncements, changes in accounting pronouncements or recently adopted accounting guidance during the three and six months ended June 30, 2026 that are of significance or potential significance to us.
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| Deferred Contract Acquisition Costs | Deferred Contract Acquisition Costs We capitalize certain contract acquisition costs consisting of incremental sales commissions incurred to obtain customer contracts. Deferred commissions related to product revenues are recognized upon transfer of control to customers. Deferred commissions related to services revenue are recognized as the related performance obligations are met. Deferred commissions that will be recognized during the succeeding 12-month period are recorded as prepaid expenses and other current assets, and the remaining portion is recorded as other non-current assets. Amortization of deferred commissions is included in sales and marketing expense.
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