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Condensed Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity - USD ($) $ in Thousands | Preferred stock Series X redeemable convertible preferred stock | Common stock Underwriting agreement | Common stock at-the-market offerings | Common stock | Additional paid-in capital Underwriting agreement | Additional paid-in capital at-the-market offerings | Additional paid-in capital | Accumulated deficit | Accumulated other comprehensive gain (loss) | Underwriting agreement | at-the-market offerings | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2023 | $ 95,324 |  |  | $ 41 |  |  | $ 728,285 | $ (580,534) | $ 0 |  |  | $ 243,116
Beginning balance (in shares) at Dec. 31, 2023 | 31,107 |  |  | 41,034,797 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net of issuance costs |  | $ 10 | $ 3 |  | $ 117,162 | $ 19,999 |  |  |  | $ 117,172 | $ 20,002 |
Issuance of common stock net of issuance costs (in shares) |  | 10,340,000 | 2,945,806 |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of options and warrants |  |  |  | $ 1 |  |  | 4,632 |  |  |  |  | 4,633
Issuance of common stock upon exercise of options and warrants (in shares) |  |  |  | 582,458 |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 2,754 |  |  |  |  | 2,754
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | (14) |  |  | (14)
Net loss |  |  |  |  |  |  |  | (19,928) |  |  |  | (19,928)
Ending balance at Mar. 31, 2024 | $ 95,324 |  |  | $ 55 |  |  | 872,832 | (600,462) | (14) |  |  | 367,735
Ending balance (in shares) at Mar. 31, 2024 | 31,107 |  |  | 54,903,061 |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2023 | $ 95,324 |  |  | $ 41 |  |  | 728,285 | (580,534) | 0 |  |  | 243,116
Beginning balance (in shares) at Dec. 31, 2023 | 31,107 |  |  | 41,034,797 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  | (68,634)
Ending balance at Sep. 30, 2024 | $ 95,324 |  |  | $ 57 |  |  | 895,110 | (649,168) | 331 |  |  | 341,654
Ending balance (in shares) at Sep. 30, 2024 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Beginning balance at Mar. 31, 2024 | $ 95,324 |  |  | $ 55 |  |  | 872,832 | (600,462) | (14) |  |  | 367,735
Beginning balance (in shares) at Mar. 31, 2024 | 31,107 |  |  | 54,903,061 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of options |  |  |  |  |  |  | 94 |  |  |  |  | 94
Issuance of common stock upon exercise of options (in shares) |  |  |  | 17,602 |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 3,451 |  |  |  |  | 3,451
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | (31) |  |  | (31)
Net loss |  |  |  |  |  |  |  | (24,172) |  |  |  | (24,172)
Ending balance at Jun. 30, 2024 | $ 95,324 |  |  | $ 55 |  |  | 876,377 | (624,634) | (45) |  |  | 347,077
Ending balance (in shares) at Jun. 30, 2024 | 31,107 |  |  | 54,920,663 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock, net of issuance costs |  |  | $ 2 |  |  | $ 15,241 |  |  |  |  | $ 15,243 |
Issuance of common stock net of issuance costs (in shares) |  |  | 1,504,619 |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of options |  |  |  |  |  |  | 58 |  |  |  |  | 58
Issuance of common stock upon exercise of options (in shares) |  |  |  | 8,937 |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 3,434 |  |  |  |  | 3,434
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | 376 |  |  | 376
Net loss |  |  |  |  |  |  |  | (24,534) |  |  |  | (24,534)
Ending balance at Sep. 30, 2024 | $ 95,324 |  |  | $ 57 |  |  | 895,110 | (649,168) | 331 |  |  | 341,654
Ending balance (in shares) at Sep. 30, 2024 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2024 | $ 95,324 |  |  | $ 57 |  |  | 898,513 | (674,794) | 163 |  |  | 319,263
Beginning balance (in shares) at Dec. 31, 2024 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 3,839 |  |  |  |  | 3,839
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | (103) |  |  | (103)
Net loss |  |  |  |  |  |  |  | (33,709) |  |  |  | (33,709)
Ending balance at Mar. 31, 2025 | $ 95,324 |  |  | $ 57 |  |  | 902,352 | (708,503) | 60 |  |  | 289,290
Ending balance (in shares) at Mar. 31, 2025 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Beginning balance at Dec. 31, 2024 | $ 95,324 |  |  | $ 57 |  |  | 898,513 | (674,794) | 163 |  |  | 319,263
Beginning balance (in shares) at Dec. 31, 2024 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  |  |  |  |  | (98,404)
Ending balance at Sep. 30, 2025 | $ 95,324 |  |  | $ 57 |  |  | 911,014 | (773,198) | 56 |  |  | 233,253
Ending balance (in shares) at Sep. 30, 2025 | 31,107 |  |  | 56,434,894 |  |  |  |  |  |  |  |
Beginning balance at Mar. 31, 2025 | $ 95,324 |  |  | $ 57 |  |  | 902,352 | (708,503) | 60 |  |  | 289,290
Beginning balance (in shares) at Mar. 31, 2025 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 4,351 |  |  |  |  | 4,351
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | (76) |  |  | (76)
Net loss |  |  |  |  |  |  |  | (33,052) |  |  |  | (33,052)
Ending balance at Jun. 30, 2025 | $ 95,324 |  |  | $ 57 |  |  | 906,703 | (741,555) | (16) |  |  | 260,513
Ending balance (in shares) at Jun. 30, 2025 | 31,107 |  |  | 56,434,219 |  |  |  |  |  |  |  |
Increase (Decrease) in Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |
Issuance of common stock upon exercise of options |  |  |  |  |  |  | 3 |  |  |  |  | 3
Issuance of common stock upon exercise of options (in shares) |  |  |  | 675 |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  |  |  |  | 4,308 |  |  |  |  | 4,308
Unrealized gain (loss) on short-term investments |  |  |  |  |  |  |  |  | 72 |  |  | 72
Net loss |  |  |  |  |  |  |  | (31,643) |  |  |  | (31,643)
Ending balance at Sep. 30, 2025 | $ 95,324 |  |  | $ 57 |  |  | $ 911,014 | $ (773,198) | $ 56 |  |  | $ 233,253
Ending balance (in shares) at Sep. 30, 2025 | 31,107 |  |  | 56,434,894 |  |  |  |  |  |  |  |

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