Capital equipment and software revenue, consisting of sales of ClearPoint reusable hardware and software and related services, decreased 18% to $2.6 million for the nine months ended September 30, 2025, from $3.2 million for the same period in 2024 due to a decrease in the placements of ClearPoint navigation capital and software and Prism laser units.
Cost of Revenue and Gross Profit. Cost of revenue was $10.3 million, resulting in gross profit of $16.3 million for the nine months ended September 30, 2025, as compared to $9.3 million, resulting in gross profit of $14.4 million for the nine months ended September 30, 2024. Gross margin was 61% for the nine months ended September 30, 2025, and broadly in line with gross margin of 61% in the same period in 2024.
Research and Development Costs. Research and development costs were $10.7 million for the nine months ended September 30, 2025, compared to $9.1 million for the same period in 2024, an increase of $1.6 million, or 18%. The increase was due primarily to higher product and software development costs.
Sales and Marketing Expenses. Sales and marketing expenses were $11.7 million for the nine months ended September 30, 2025, compared to $10.7 million for the same period in 2024, an increase of $1.0 million, or 10%. This increase was due primarily to additional personnel costs, including share-based compensation, resulting from increases in headcount, of $1.1 million, partially offset by lower travel costs of $0.1 million.
General and Administrative Expenses. General and administrative expenses were $11.1 million for the nine months ended September 30, 2025, compared to $8.7 million for the same period in 2024, an increase of $2.3 million, or 27%. This increase was due primarily to higher personnel costs, including share-based compensation, of $0.8 million, higher bad debt expense of $0.7 million, higher professional service fees of $0.4 million, and higher IT costs of $0.3 million.
Interest Income (Expense), net. Net interest expense was $0.5 million for the nine months ended September 30, 2025, compared to net interest income of $0.6 million for the nine months ended September 30, 2024. Interest expense increased from $0.5 million in the nine months ended September 30, 2024 to $1.3 million in the nine months ended September 30, 2025 due to the note payable entered into in May 2025. This was partially offset by interest income of $0.8 million in the nine months ended September 30, 2025, which decreased from $1.2 million in the nine months ended September 30, 2024. The decrease in interest income is mainly as a result of decreased investment in U.S. Government securities due to lower cash balances in the first half of 2025. See Note 6 to the Condensed Consolidated Financial Statements included in Part 1, Item 1 in this Quarterly Report for additional information with respect to the note payable.
Liquidity and Capital Resources
We have incurred net losses since our inception, which has resulted in a cumulative deficit at September 30, 2025 of $209.1 million. In addition, our use of cash from operations amounted to $11.8 million for the nine months ended September 30, 2025, and $9.0 million for the year ended December 31, 2024. Since inception, we have financed our operations principally from the sale of equity securities and the issuance of notes payable.
In May 2025, the Company entered into the 2025 SPA with the 2025 Investor relating to the purchase and sale in a registered direct offering of an aggregate of 275,808 shares of Company’s common stock, par value $0.01 per share at a price of $12.69 per share, based on the trailing 30-trading day volume-weighted average price of the Company’s common stock. The aggregate net proceeds to the Company from the offering totaled approximately $3.3 million after deducting offering expenses payable by the Company.
Contemporaneously with the 2025 SPA, the Company entered into the 2025 NPA under which the Company may sell to the 2025 Investor, and the 2025 Investor may buy from the Company, tranches of notes in an aggregate principal amount of up to $105.0 million. The net proceeds in connection with the issuance of the First Purchase Note, after deducting the debt discount and debt issuance costs of $0.6 million and $0.7 million, respectively, was approximately $28.7 million.