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Stock-Based Compensation | 6 Months Ended
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Jun. 30, 2026
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 |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Cost of product revenues |  | $ | 897 |  |  | $ | 899 |  |  | $ | 1,733 |  |  | $ | 1,866 |
Selling, general and administrative |  |  | 2,085 |  |  |  | 1,790 |  |  |  | 4,044 |  |  |  | 3,984 |
Research and development |  |  | 1,198 |  |  |  | 1,020 |  |  |  | 2,255 |  |  |  | 2,208 |
Total stock-based compensation |  | $ | 4,180 |  |  | $ | 3,709 |  |  | $ | 8,032 |  |  | $ | 8,058 |
Compensation expense by type of award was as follows (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Stock options |  | $ | 3,792 |  |  | $ | 3,386 |  |  | $ | 7,319 |  |  | $ | 7,463 |
ESPP |  |  | 388 |  |  |  | 323 |  |  |  | 713 |  |  |  | 595 |
Total stock-based compensation |  | $ | 4,180 |  |  | $ | 3,709 |  |  | $ | 8,032 |  |  | $ | 8,058 |

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