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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 | Note 11. Stock-Based Compensation The Company’s stock-based compensation included in its unaudited interim condensed consolidated statements of operations and comprehensive loss, net of forfeitures, was as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
(in thousands) |  | 2025 |  | 2024
Research and development | ​ | $ | 1,150 | ​ | $ | 1,451
General and administrative | ​ |  | 2,662 | ​ |  | 3,333
Cost of revenue | ​ | ​ | 161 | ​ | ​ | —
Total stock-based compensation | ​ | $ | 3,973 | ​ | $ | 4,784
​ The following table summarizes stock-based compensation expense by award type, net of forfeitures: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31,
(in thousands) | ​ | 2025 | ​ | 2024
Restricted Stock Units ("RSUs") | ​ | $ | 2,815 | ​ | $ | 3,085
Performance Stock Units ("PSUs") | ​ | ​ | 657 | ​ | ​ | 932
Restricted Stock Awards ("RSAs") | ​ | ​ | 478 | ​ | ​ | 491
Stock options | ​ | ​ | 23 | ​ | ​ | 276
Total | ​ | $ | 3,973 | ​ | $ | 4,784
​ PSUs are measured at their estimated fair value using a Monte Carlo simulation valuation model with the effect of the market condition reflected in the grant date fair value of the award. The fair value of RSUs is estimated based on the closing price of the Company’s Class A common stock at the date of grant.

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