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Condensed Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands | Total | Series A Convertible Preferred Stock | Series B Convertible Preferred Stock | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Accumulated Deficit
--- | --- | --- | --- | --- | --- | --- | ---
Convertible Preferred Stock, beginning balance at Dec. 31, 2023 |  | $ 89,487 | $ 77,091 |  |  |  |
Convertible Preferred Stock, beginning balance, shares at Dec. 31, 2023 |  | 100,182,354 | 51,273,790 |  |  |  |
Beginning balance at Dec. 31, 2023 | $ (25,634) |  |  | $ 4 | $ 19,796 | $ 4 | $ (45,438)
Beginning balance, shares at Dec. 31, 2023 |  |  |  | 4,170,817 |  |  |
Issuance of Series B convertible preferred stock for the settlement of the tranche right liability, net of issuance costs | 7,343 |  | $ 68,161 |  | 7,343 |  |
Issuance of Series B convertible preferred stock for the settlement of the tranche right liability, net of issuance costs, shares |  |  | 38,157,240 |  |  |  |
Stock-based compensation expense | 1,491 |  |  |  | 1,491 |  |
Net loss | (22,669) |  |  |  |  |  | (22,669)
Change in unrealized gain (loss) on investments, net of tax | (164) |  |  |  |  | (164) |
Convertible Preferred Stock, ending balance at Mar. 31, 2024 | $ 234,739 | $ 89,487 | $ 145,252 |  |  |  |
Convertible Preferred Stock, ending balance, shares at Mar. 31, 2024 | 189,613,384 | 100,182,354 | 89,431,030 |  |  |  |
Ending balance at Mar. 31, 2024 | $ (39,633) |  |  | $ 4 | 28,630 | (160) | (68,107)
Ending balance, shares at Mar. 31, 2024 |  |  |  | 4,170,817 |  |  |
Convertible Preferred Stock, beginning balance at Dec. 31, 2023 |  | $ 89,487 | $ 77,091 |  |  |  |
Convertible Preferred Stock, beginning balance, shares at Dec. 31, 2023 |  | 100,182,354 | 51,273,790 |  |  |  |
Beginning balance at Dec. 31, 2023 | (25,634) |  |  | $ 4 | 19,796 | 4 | (45,438)
Beginning balance, shares at Dec. 31, 2023 |  |  |  | 4,170,817 |  |  |
Net loss | (78,300) |  |  |  |  |  |
Ending balance at Dec. 31, 2024 | $ 305,427 |  |  | $ 37 | 429,657 | (522) | (123,745)
Ending balance, shares at Dec. 31, 2024 | 36,580,202 |  |  | 36,580,202 |  |  |
Stock-based compensation expense | $ 4,040 |  |  |  | 4,040 |  |
Issuance of common stock upon exercise of stock options | $ 6 |  |  |  | 6 |  |
Issuance of common stock upon exercise of stock options, shares | 3,240 |  |  | 3,240 |  |  |
Repurchase of unvested restricted common stock | $ (1) |  |  |  | (1) |  |
Repurchase of unvested restricted common stock, shares |  |  |  | (86,008) |  |  |
Net loss | (24,063) |  |  |  |  |  | (24,063)
Change in unrealized gain (loss) on investments, net of tax | 427 |  |  |  |  | 427 |
Ending balance at Mar. 31, 2025 | $ 285,836 |  |  | $ 37 | $ 433,702 | $ (95) | $ (147,808)
Ending balance, shares at Mar. 31, 2025 | 36,497,434 |  |  | 36,497,434 |  |  |

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