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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2025
Stock-Based Compensation |
Summary of Stock-Based Compensation Expense | The following table presents the details of the Company’s share-based compensation expense (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Three Months Ended June 30, | ​ | Six Months Ended June 30,
​ | 2025 |  | 2024 | ​ | 2025 |  | 2024
General and administrative | $ | 688 | ​ | $ | 980 | ​ | $ | 1,405 | ​ | $ | 1,960
Research and development | ​ | 437 | ​ | ​ | 689 | ​ | ​ | 934 | ​ | ​ | 1,269
Sales and marketing | ​ | 133 | ​ | ​ | 193 | ​ | ​ | 310 | ​ | ​ | 347
Cost of sales | ​ | 161 | ​ | ​ | — | ​ | ​ | 347 | ​ | ​ | —
Total stock-based compensation | $ | 1,419 | ​ | $ | 1,862 | ​ | $ | 2,996 | ​ | $ | 3,576
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​
Summary of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Options Outstanding
​ | ​ | ​ | ​ | Weighted- | ​ | Weighted- | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Remaining | ​ | Intrinsic
​ | ​ | Number of | ​ | Price Per | ​ | Contractual | ​ | Value
​ | ​ | Options |  | Share |  | Life (years) |  | (In thousands)
Balance—December 31, 2024 |  | 1,521,857 | ​ | $ | 6.04 |  | 5.9 | ​ | $ | 1,507
Options granted | ​ | — | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (23,353) | ​ | $ | 2.91 | ​ | ​ | ​ | $ | 70
Options cancelled/forfeited |  | (8,252) | ​ | $ | 6.72 | ​ | ​ | ​ | ​ | ​
Balance—June 30, 2025 |  | 1,490,252 | ​ | $ | 6.08 | ​ | 5.3 | ​ | $ | 1,331
Options exercisable—June 30, 2025 | ​ | 1,421,558 | ​ | $ | 6.00 | ​ | 5.3 | ​ | $ | 1,328
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of restricted stock unit activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | RSUs Outstanding
​ | ​ | ​ |  | Weighted-
​ | ​ | ​ |  | Average
​ | ​ | Number of |  | Grant Date
​ | ​ | Restricted Stock |  | Fair Value Per
​ |  | Units |  | Share
Balance—December 31, 2024 | ​ | 987,965 | ​ | $ | 7.89
Granted |  | 885,303 | ​ | $ | 5.76
Vested | ​ | (426,610) | ​ | $ | 7.23
Cancelled/forfeited | ​ | (17,554) | ​ | $ | 6.93
Balance—June 30, 2025 |  | 1,429,104 |  | $ | 6.78

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