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Share-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2025
Share-Based Compensation |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | Weighted- |  |  | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ | ​ | Options Outstanding | ​ | Price Per Share | ​ | Life (in years) | ​ | Value (in thousands)
Outstanding, December 31, 2024 |  | 8,131,235 | ​ | $ | 1.01 |  | 8.04 | ​ | $ | 115,878
Granted |  | — | ​ | ​ | — |  | ​ |  |  | ​
Exercised |  | (1,594,598) | ​ | ​ | 0.90 |  | ​ |  | ​ | 17,441
Forfeited and expired |  | — | ​ | ​ | — |  | ​ |  |  | ​
Outstanding and expected to vest, June 30, 2025 | ​ | 6,536,637 | ​ | $ | 1.03 | ​ | 7.63 | ​ | $ | 70,763
Exercisable, June 30, 2025 |  | 3,454,324 | ​ | $ | 0.79 |  | 6.74 | ​ | $ | 38,255
Schedule of activity related to restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted Average
​ | ​ | ​ | ​ | Grant Date Fair
​ |  | Shares |  | Value
Non-vested at December 31, 2024 |  | 11,177,661 | ​ | $ | 1.53
Granted |  | 823,342 | ​ | ​ | 9.08
Vested |  | (5,234,029) | ​ | ​ | 1.66
Forfeited |  | (222,852) | ​ | ​ | 1.54
Non-vested at June 30, 2025 |  | 6,544,122 | ​ | $ | 2.38
Schedule of total stock-based compensation expenses | The table below summarizes total stock-based compensation expenses for the three and six months ended June 30, 2025 and June 30, 2024 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, | ​ | Six Months Ended June 30, | ​
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024 | ​
Research and development | ​ | $ | 2,256 | ​ | $ | 2,262 | ​ | $ | 5,277 | ​ | $ | 4,189 | ​
Selling, general and administrative expenses | ​ | ​ | 1,298 | ​ | ​ | 1,025 | ​ | ​ | 2,451 | ​ | ​ | 2,089 | ​
Total stock-based compensation expenses | ​ | $ | 3,554 | ​ | $ | 3,287 | ​ | $ | 7,728 | ​ | $ | 6,278 | ​
​

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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