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Significant Accounting Policies (Policies) | 9 Months Ended
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Sep. 30, 2025
Accounting Policies [Abstract] |
Basis of Accounting, Policy [Policy Text Block] | Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared on a basis consistent with the Company’s December 31, 2024 audited consolidated financial statements and include all adjustments, consisting of only normal recurring adjustments, necessary to fairly state the information set forth herein. The condensed consolidated financial statements have been prepared in accordance with the applicable rules and regulations of the Securities and Exchange Commission (the “SEC”) and, as permitted by such rules and regulations, omit certain information and footnote disclosures necessary to present the financial statements in accordance with accounting principles generally accepted in the United States (“U.S. GAAP”). The condensed consolidated balance sheet as of December 31, 2024 was derived from the audited consolidated financial statements as of that date but does not include all of the information and footnotes required by U.S. GAAP for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2024. The results of operations for the three and nine-months ended September 30, 2025, are not necessarily indicative of the results to be expected for the entire year or any future periods.
Consolidation, Policy [Policy Text Block] | Principles of Consolidation The accompanying condensed consolidated financial statements include the financial statements of Pulse Biosciences, Inc. and its wholly-owned subsidiaries. Intercompany balances and transactions, if any, have been eliminated in consolidation.
Use of Estimates, Policy [Policy Text Block] | Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires the Company to make estimates that affect the amounts reported in the financial statements and accompanying notes to the financial statements. Estimates include, but are not limited to, the valuation and recognition of stock-based compensation, the valuation of equity-classified subscription rights, inventory valuation, income taxes, and the useful lives assigned to long-lived assets. The Company evaluates its estimates and assumptions based on historical experience and other factors and adjusts those estimates and assumptions when facts and circumstances dictate. Actual results could differ materially from these estimates.
Share-Based Payment Arrangement [Policy Text Block] | Stock-Based Compensation The Company's stock-based compensation programs include stock options and an employee stock purchase program. The Company periodically issues stock options to officers, directors, employees, and consultants for services rendered. Such issuances vest and expire according to terms established at the issuance date. Stock-based payments to officers, directors and employees, including grants of employee stock options, are recognized in the financial statements based on their grant date fair values, which are estimated using the Black-Scholes option-pricing model. Stock-based compensation expense is charged to operations on a straight-line basis over the vesting period. The Company has granted stock options with both time-based as well as performance-based vesting conditions. For stock awards with performance-based vesting conditions, the Company does not recognize compensation expense until it is probable that the performance-based vesting condition will be achieved. The analysis to determine such probability involves estimates and judgements from management and the estimate of expense may be revised periodically. In October 2024, the Board approved changes to the vesting conditions of certain outstanding common stock option awards so that the performance-based vesting criteria of those particular awards were modified to either time-based or market-based vesting criteria. During 2024, the Company issued certain stock options with market-based vesting conditions and modified certain performance-based stock option awards to market-based options. These vesting conditions relate to the achievement of certain market capitalization targets of the Company. Using a Monte Carlo simulation model, the Company estimated the fair value of the market-based options on the grant date or modification date, with the associated stock-based compensation expense recognized over the requisite service period. The requisite service period is the service period derived from the Monte Carlo simulation model. If the market capitalization targets are met sooner than the derived service period, the Company will accelerate the recognition of stock-based compensation expense to reflect the cumulative expense associated with the vested shares. In the first quarter of 2025, the Company issued certain executives stock options with both market-based and performance-based vesting conditions. These vesting conditions relate to both the achievement of certain market capitalization targets of the Company, as well as the achievement of certain revenue and margin metrics. Using a Monte Carlo simulation model, the Company estimated the fair value of the market-based options on the grant date, along with a derived service period. Compensation expense for the awards is recognized over the requisite service period, which is the longer of the derived service period or the implicit service period (the period when the performance condition is expected to be met). Compensation expense is recognized only once it becomes probable that the associated performance condition will be achieved and the employee is expected to render the requisite service. Once these criteria are met, the Company will recognize expense using the accelerated attribution method over the requisite service period. If, at any point, the performance condition is no longer probable of being achieved or the employee is no longer expected to complete the requisite service period, any previously recognized expense will be reversed. Additionally, if both the market and performance conditions are satisfied before the end of the requisite service period, any remaining unrecognized expense will be recognized immediately, provided that the employee is still providing service. The Monte Carlo simulation models require the Company to make assumptions and judgements about the variables used in the calculations including the expected volatility, the risk-free interest rate, cost of equity, and the expected term. The assumptions used in the option-pricing model represent management’s best estimates. If factors change and different assumptions are used, the Company's stock-based compensation expense could be materially different in the future. See Note 6 for a detailed discussion of the Company’s stock plans and stock-based compensation expense.
Inventory, Policy [Policy Text Block] | Valuation of Inventory During the nine-months ended September 30, 2025, the Company determined that costs had future economic benefit subsequent to receiving FDA approval, and as such, it began to capitalize inventory in preparation of its limited market release of percutaneous electrodes for its Vybrance Percutaneous Electrode System. Prior to capitalizing inventory, all direct and indirect manufacturing costs were charged to research and development expenses in the period incurred or written off as excess and obsolete inventory in 2022, including previously manufactured consoles. Inventory is stated at lower of cost or net realizable value. The Company establishes the inventory basis by determining the cost based on standard costs approximating the purchase costs on a first-in, first-out basis. Net realizable value is the estimated selling price in the ordinary course of the Company’s business, less reasonably predictable costs of completion, disposal, and transportation. The cost basis of the Company’s inventory will be reduced for any products that are considered excessive or obsolete based upon assumptions about future demand and market conditions. During the nine-months ended September 30, 2025, there was no reduction to the balance of inventory for excessive and obsolete inventory.
Revenue from Contract with Customer [Policy Text Block] | Revenue from Contracts with Customers The Company accounts for a contract with a customer when the rights and obligations of the parties are identifiable, the contract has commercial substance, and the collectability of the consideration to be received from the customer is considered probable. Contracts with customers are for the sale of the nPulse Vybrance system, which includes system components, software, and system accessories. Instruments and other accessories may also be included with the system or may be sold on a standalone basis. These products are considered performance obligations to the extent they are separately identifiable from other products in the contract and when the customer can either benefit from the product on its own or with other goods or services that are readily available to the customer. The Company recognizes revenue at a point in time when it satisfies performance obligations by transferring control of promised goods to its customers. Transfer of control occurs based on shipping terms as contractually negotiated. The amount of revenue recognized is equal to the consideration to which the Company expects to be entitled in exchange for the promised goods. Though some products may be sold on a stand-alone basis, initial customer contracts will likely involve the bundling of products which will be delivered concurrently to the customer for a single price. The initial limited market release period will also include evaluation agreements with customers that allow either the Company or the customer to terminate the contract at any point without penalty. The termination right limits the effective contract term to the period for which the contract was not terminated. The Company generally extends payment terms to customers after the Company performs a necessary credit evaluation to ensure future collectability of the outstanding balance. Payment generally occurs within a relatively short period of time after delivery of products. The transaction price is the consideration to which the Company expects to be entitled in exchange for providing the promised goods to customers. Though most customer orders are for a fixed amount of consideration, the Company evaluates the possible impact of variable consideration in determining the transaction price, in particular the possibility of future returns. Sales agreements allow for a right of return only if the product does not conform to the agreed upon quality standards or if the product was shipped due to Company error. The Company anticipates such returns will be minimal and has made no adjustments to the transaction price for any estimated returns. The transaction price is determined at contract execution and updated each quarter for any changes in circumstances (e.g., changes in estimated return amount). The Company has made an accounting policy election to exclude from the measurement of the transaction price all taxes which are imposed on and concurrent with a specific revenue-producing transaction and collected by the entity from a customer. When there are multiple performance obligations present, the total transaction price shall be allocated to each of the performance obligations based upon the relative standalone selling price (“SSP”) of those performance obligations. The Company establishes SSPs based on multiple factors including prices charged by the Company for similar offerings, product-specific business objectives, and the estimated cost to provide the performance obligation. Shipping and handling activities are not considered to be a separate performance obligation. The Company has made an accounting policy election to account for shipping and handling activities as fulfillment activities when these activities occur after the customer obtains control of the product. The Company has determined that certain promises in the multiple-element arrangements, such as installation, training, and certain ancillary products, are immaterial in the context of the contract and do not represent separate performance obligations to which transaction price is allocated. The Company utilizes the practical expedient under ASC 606 and does not disclose unsatisfied performance obligations for contracts as the contracts generally have an original duration of less than one year. Additionally, the Company does not currently have significant contract assets or deferred revenue. The Company does not incur contract origination costs.
Earnings Per Share, Policy [Policy Text Block] | Net Loss per Share The Company calculates basic net loss per share by dividing net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential dilutive common stock equivalents outstanding during the period. For purposes of this calculation, options to purchase common stock and common stock warrants are considered common stock equivalents. Potential common shares that have an anti-dilutive effect (i.e., those that increase income per share or decrease loss per share) are excluded from the calculation of diluted net loss per share. Basic and diluted net loss per common share is the same for all periods presented because all warrants, stock options and restricted stock units outstanding are anti-dilutive. The following outstanding stock options and warrants were excluded from the computation of diluted net loss per share for the periods presented because including them would have had an anti-dilutive effect:
|  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |
Common stock warrants |  |  | 205,953 |  |  |  | 5,857,680 |
Common stock options |  |  | 13,303,744 |  |  |  | 12,327,332 |
Total |  |  | 13,509,697 |  |  |  | 18,185,012 |
Reclassification, Comparability Adjustment [Policy Text Block] | Reclassification Certain reclassifications have been made to the prior period presentation of the cash flows from operating activities within the condensed consolidated statements of cash flows to conform to current period presentation. Specifically, the presentation of operating lease expenses has been reclassified from “Right-of-use assets” within “Changes in operating assets and liabilities” to “Non-cash lease expense” within “Adjustments to reconcile net loss to net cash used in operating activities”. Additionally, certain reclassifications have been made to the prior period presentation of other income within the condensed consolidated statements of operations and comprehensive loss to conform to current period presentation. Specifically, the presentation of "Other expense" has been reclassified out of "Interest income, net." As a result of these changes, the presentation of these expenses in the comparative periods has been changed to conform to the current period. These reclassifications did not have an impact on the Company’s results of operations and total cash flows from operating activities for the three and nine-months ended September 30, 2025 and 2024, respectively, or the Company's financial position as of September 30, 2025 and December 31, 2024.
New Accounting Pronouncements, Policy [Policy Text Block] | Recent Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. This ASU requires greater disaggregation of information about a reporting entity's effective tax rate reconciliation as well as information on income taxes paid. This ASU applies to all entities subject to income taxes and is intended to help investors better understand an entity’s exposure to potential changes in jurisdictional tax legislation and assess income tax information that affects cash flow forecasts and capital allocation decisions. This ASU is effective for annual periods beginning after December 15, 2024, with early adoption permitted. This ASU should be applied on a prospective basis although retrospective application is permitted. While the Company is still evaluating the full impact of the adoption of this ASU, it does not expect it to have a material impact on its consolidated financial statements and related disclosures. In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses, which aims to improve the disclosures about a public business entity’s expenses and address requests from investors for more detailed information about the types of expenses in commonly presented expense captions. The guidance is effective for the Company's annual periods beginning in 2027 and interim periods beginning in the first quarter of fiscal year 2028. The Company is currently evaluating the impact of the new guidance. 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 provides a practical expedient to measure credit losses on current accounts receivable and current contract assets under Accounting Standards Codification 606, Revenue from Contracts with Customers. The practical expedient assumes that current conditions as of the balance sheet date do not change for the remaining life of the asset. The guidance is effective for the Company's interim and annual periods beginning in 2026. The Company is currently evaluating the impact of the new guidance.
Income Tax, Policy [Policy Text Block] | Recent Tax Legislation During the three months ended September 30, 2025, the One Big Beautiful Bill Act ("OBBBA") was enacted. The Company does not anticipate a material impact to income tax expense for the year ended December 31, 2025 as a result of OBBBA.

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