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Stock Option Plan and Stock-Based Compensation | 9 Months Ended
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Sep. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Stock Option Plan and Stock-Based Compensation | 8. Stock Option Plan and Stock-Based Compensation In July 2025, the Company's board of directors adopted, and the Company's stockholders approved the 2025 Equity Incentive Plan (the 2025 Plan). The 2025 Plan became effective on July 29, 2025, the date the final prospectus was filed in connection with the Company's IPO. The 2025 Plan came into existence upon its adoption by the Company's board of directors. No further awards will be granted under the 2010 Equity Incentive Plan (2010 Plan) or 2020 Equity Incentive Plan (2020 Plan, and collectively, along with the 2025 Plan and 2010 Plan, the Plans) . At September 30, 2025, there were 1,703,600 shares of common stock reserved for future issuance under the 2025 Plan, with no grants and no forfeitures. Awards outstanding under the Plans remain subject to the terms of the respective Plans, but shares reserved for issuance under each of the 2010 Plan and 2020 Plan that were not subject to outstanding awards at the time the 2025 Plan became effective are no longer available for issuance. The following table summarizes the effects of stock-b ased compensation on cost of sales, research and development, and sales, general and administrative expenses granted under the Plans (in thousands) for the three and nine months ended September 30, 2025 and 2024:
|  | Three months ended September 30, |  |  | Nine months ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Cost of sales |  | $ | 26 |  |  | $ | 178 |  |  | $ | 126 |  |  | $ | 279 |
Research and development |  | $ | 261 |  |  |  | 873 |  |  |  | 980 |  |  |  | 2,021 |
Sales, general and administrative |  | $ | 1,781 |  |  |  | 1,071 |  |  |  | 2,578 |  |  |  | 2,011 |
Total |  | $ | 2,068 |  |  | $ | 2,122 |  |  | $ | 3,684 |  |  | $ | 4,311 |
The total unrecognized stock-based compensation expense related to unvested stock options and subject to recognition in future periods was approximately $4.7 million at September 30, 2025. As of September 30, 2025, the Company anticipates this expense to be recognized over a weighted-average period of approximately 2.2 years. On September 29, 2025, the Company's board of directors approved the acceleration of one-third of previously issued options to the Company's chief financial officer, resulting in an additional $0.3 million of stock-based compensation expense for the three months ended September, 30, 2025. The Company recognized approximately $1.0 million of share based compensation expense during the three months ended September 30, 2025, related to RSUs in which the time-based service and performance conditions were satisfied upon completion of the IPO. This expense was reflected in sales, general and administrative expense. During the three months ended September 30, 2025, the Company received $0.2 million from the exercise of stock options granted under the Plans. No RSUs were granted during the three months ended September 30, 2025, however grants were made subsequent to the balance sheet date, refer to Note 12 - Subsequent Events. During the nine months ended September 30, 2025, the Company received $0.4 million from the exercise of stock options granted under the Plans and granted 71,427 RSUs to several non-employee directors, which RSUs vest upon satisfaction of a service-based condition and performance condition based on a liquidity event. T he Company granted 23,809 and 71,427 RSUs in total during the three and nine months ended September 30, 2024, respectively.

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