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Note 8 - Segment Reporting | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Segment Reporting Disclosure [Text Block] | 8. Segment Reporting The Company conducts business as one operating and reportable segment relating to the research and development of the Company’s NPS technology. The Company's chief executive officer, who is the chief operating decision maker ("CODM"), views the Company’s operations and manages its business in one operating segment. The CODM uses the Company’s consolidated net loss to monitor actual results as compared to the budget in assessing segment performance and allocation of resources. Managing and allocating resources on an entity-wide basis enables the CODM to assess the overall level of resources available and how to best deploy these resources across functions and research and development projects that are in line with the Company’s long-term company-wide strategic goals. Consistent with this decision-making process, the CODM uses financial information for purposes of evaluating performance, forecasting future period financial results, allocating resources, and setting incentive targets. Operating expenses are used to monitor budget versus actual results. The CODM is regularly provided with more detailed expense information than what is included in our condensed consolidated statement of operations and comprehensive loss. All product sales are in the United States and there are no significant groupings of product revenue the CODM considers or reviews when making operating decisions and assessing performance. The table below shows a reconciliation of the Company’s net loss, including the significant expense categories regularly provided to and reviewed by the CODM, as computed under U.S. GAAP to the Company’s total net loss in the statements of operations (in thousands).
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Product revenue |  | $ | 86 |  |  | $ | — |  |  | $ | 86 |  |  | $ | — |
Adjusted cost of product revenue1 |  |  | 172 |  |  |  | — |  |  |  | 172 |  |  |  | — |
Cross platform research and engineering2 |  |  | 3,546 |  |  |  | 3,084 |  |  |  | 11,133 |  |  |  | 9,586 |
R&D manufacturing and engineering3 |  |  | 2,328 |  |  |  | 1,376 |  |  |  | 6,658 |  |  |  | 3,498 |
Clinical and regulatory4 |  |  | 2,363 |  |  |  | 1,245 |  |  |  | 5,902 |  |  |  | 2,913 |
General and administrative5 |  |  | 3,993 |  |  |  | 3,861 |  |  |  | 11,611 |  |  |  | 10,378 |
Sales and marketing6 |  |  | 2,177 |  |  |  | 813 |  |  |  | 5,997 |  |  |  | 1,937 |
Other segment items7 |  |  | 5,874 |  |  |  | 3,276 |  |  |  | 17,299 |  |  |  | 7,684 |
Total other income, net |  |  | (982 | ) |  |  | (975 | ) |  |  | (3,338 | ) |  |  | (1,796 | )
Net loss |  | $ | (19,385 | ) |  | $ | (12,680 | ) |  | $ | (55,348 | ) |  | $ | (34,200 | )
___________________ 1 Adjusted cost of product revenue includes material costs, cash compensation costs, fees paid to consultants and outside service providers and organizations, and other expenses relating to manufacturing the Company’s commercial products. It does not include stock-based compensation, depreciation, amortization, IT and facilities costs - see descriptions of Other segment items in footnote 7 and General and administrative in footnote 5 below. 2 Cross platform research and engineering includes compensation costs, fees paid to consultants and outside service providers and organizations, prototype spending and other expenses relating to the acquisition, design and development of the Company’s clinical stage devices. 3 R&D manufacturing and engineering includes compensation costs, fees paid to consultants and outside service providers and organizations, and costs associated with the procurement of materials and the manufacturing of the Company’s clinical stage devices. 4 Clinical and regulatory includes compensation costs, fees paid to consultants and outside service providers and organizations, and costs associated with clinical trials and regulatory approvals required for the development of the Company’s clinical stage devices. 5 General and administrative includes compensation costs and fees paid to consultants and outside service providers and organizations in support of the administrative functions of the Company, including finance, legal, human resources, IT and facilities. 6 Sales and marketing includes compensation costs, fees paid to consultants and outside service providers and organizations, costs associated with marketing and sales strategy as well as execution of marketing and sales initiatives for the Company's products. 7 Other segment items includes stock-based compensation, depreciation and amortization. As of September 30, 2025, all of the Company’s long-lived assets are located in the United States.

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- Definition The entire disclosure for reporting segments including data and tables. 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