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Stock-Based Compensation | 3 Months Ended
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Mar. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation | 7. Stock-Based Compensation The Company uses the Black-Scholes option pricing model to calculate the fair value of stock option awards, whether they possess time-based vesting provisions or performance-based vesting provisions, and awards granted under the Vicor Corporation 2017 Employee Stock Purchase Plan (“ESPP”), as of their grant date. Stock-based compensation expense was as follows (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2025 |  |  | 2024 |
Cost of product revenues |  | $ | 967 |  |  | $ | 754 |
Selling, general and administrative |  |  | 2,194 |  |  |  | 1,919 |
Research and development |  |  | 1,188 |  |  |  | 1,107 |
Total stock-based compensation |  | $ | 4,349 |  |  | $ | 3,780 |
Compensation expense by type of award was as follows (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2025 |  |  | 2024 |
Stock options |  | $ | 4,077 |  |  | $ | 3,466 |
ESPP |  |  | 272 |  |  |  | 314 |
Total stock-based compensation |  | $ | 4,349 |  |  | $ | 3,780 |

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