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Shareholders' Equity - Changes in Shareholders' Deficit (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Net loss | $ (160,304) |  |  |  | $ (102,574) |  |  | $ (659,579) | $ (263,412) |
Other comprehensive (loss) income | 218 |  |  |  | 138 |  |  | 205 | (126) |
Total Shareholders' Equity |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Beginning balance | 383,740 | $ 301,447 | $ 427,975 | $ 290,006 | 387,255 | $ 472,258 | $ 538,771 | 427,975 | 538,771 | $ 290,006
Net loss | (160,304) | (319,771) | (179,504) |  | (102,574) | (90,346) | (70,492) |  |  |
Issuance of common shares, net of offering costs | 76,361 | 317,720 |  |  |  |  |  |  |  |
Issuance of common shares as payment for assets | 18 | 446 | 10,347 |  |  |  |  |  |  |
Issuance of common shares as payment under license and other agreements | 9 | 65,981 | 5,637 |  |  |  |  |  |  |
Issuance of common shares under 2022 Equity Incentive Plan | 3,804 |  | 2,156 |  | 731 |  | 332 |  |  |
Issuance of common shares under 2022 Equity Incentive Plan and 2022 Employee Share Purchase Plan |  | 2,317 |  |  |  | 794 |  |  |  |
Issuance of warrant as payment under license agreement |  | 3,340 |  |  |  |  |  |  |  |
Non-cash share-based compensation expense | 12,160 | 12,232 | 34,877 |  | 4,456 | 4,695 | 3,765 |  |  |
Other comprehensive (loss) income | 218 | 28 | (41) |  | 138 | (146) | (118) |  |  |
Ending balance | $ 316,006 | $ 383,740 | $ 301,447 | $ 427,975 | $ 290,006 | $ 387,255 | $ 472,258 | $ 316,006 | $ 290,006 | $ 316,006
Common Shares |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Beginning balance (in shares) | 92,346,332 | 81,807,221 | 81,115,723 | 68,364,143 | 68,316,953 | 68,212,479 | 68,190,479 | 81,115,723 | 68,190,479 | 68,364,143
Beginning balance | $ 1,298,553 | $ 910,964 | $ 887,528 | $ 618,761 | $ 617,510 | $ 616,246 | $ 615,742 | $ 887,528 | $ 615,742 | $ 618,761
Issuance of common shares, net of offering costs (in shares) | 2,154,857 | 8,544,951 |  |  |  |  |  |  |  |
Issuance of common shares, net of offering costs | $ 76,361 | $ 317,720 |  |  |  |  |  |  |  |
Issuance of common shares as payment for assets (in shares) | 428 | 10,452 | 242,958 |  |  |  |  |  |  |
Issuance of common shares as payment for assets | $ 18 | $ 446 | $ 10,347 |  |  |  |  |  |  |
Issuance of common shares as payment under license and other agreements (in shares) | 154 | 1,872,874 | 97,233 |  |  |  |  |  |  |
Issuance of common shares as payment under license and other agreements | $ 9 | $ 65,981 | $ 5,637 |  |  |  |  |  |  |
Issuance of common shares under equity incentive plan (shares) | 397,422 |  | 351,307 |  | 47,190 |  | 22,000 |  |  |
Issuance of common shares under 2022 Equity Incentive Plan | $ 6,758 |  | $ 7,452 |  | $ 1,251 |  | $ 504 |  |  |
Issuance of common shares under equity incentive plan and employee share purchase plan (in shares) |  | 110,834 |  |  |  | 104,474 |  |  |  |
Issuance of common shares under 2022 Equity Incentive Plan and 2022 Employee Share Purchase Plan |  | $ 3,442 |  |  |  | $ 1,264 |  |  |  |
Ending balance (in shares) | 94,899,193 | 92,346,332 | 81,807,221 | 81,115,723 | 68,364,143 | 68,316,953 | 68,212,479 | 94,899,193 | 68,364,143 | 94,899,193
Ending balance | $ 1,381,699 | $ 1,298,553 | $ 910,964 | $ 887,528 | $ 618,761 | $ 617,510 | $ 616,246 | $ 1,381,699 | $ 618,761 | $ 1,381,699
Additional Paid-in Capital |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Beginning balance | 83,832 | 69,385 | 39,804 | 25,623 | 21,687 | 17,462 | 13,869 | 39,804 | 13,869 | 25,623
Issuance of common shares under 2022 Equity Incentive Plan | (2,954) |  | (5,296) |  | (520) |  | (172) |  |  |
Issuance of common shares under 2022 Equity Incentive Plan and 2022 Employee Share Purchase Plan |  | (1,125) |  |  |  | (470) |  |  |  |
Issuance of warrant as payment under license agreement |  | 3,340 |  |  |  |  |  |  |  |
Non-cash share-based compensation expense | 12,160 | 12,232 | 34,877 |  | 4,456 | 4,695 | 3,765 |  |  |
Ending balance | 93,038 | 83,832 | 69,385 | 39,804 | 25,623 | 21,687 | 17,462 | 93,038 | 25,623 | 93,038
Accumulated Deficit |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Beginning balance | (998,567) | (678,796) | (499,292) | (354,536) | (251,962) | (161,616) | (91,124) | (499,292) | (91,124) | (354,536)
Net loss | (160,304) | (319,771) | (179,504) |  | (102,574) | (90,346) | (70,492) |  |  |
Ending balance | (1,158,871) | (998,567) | (678,796) | (499,292) | (354,536) | (251,962) | (161,616) | (1,158,871) | (354,536) | (1,158,871)
Accumulated Other Comprehensive Loss |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |
Beginning balance | (78) | (106) | (65) | 158 | 20 | 166 | 284 | (65) | 284 | 158
Other comprehensive (loss) income | 218 | 28 | (41) |  | 138 | (146) | (118) |  |  |
Ending balance | $ 140 | $ (78) | $ (106) | $ (65) | $ 158 | $ 20 | $ 166 | $ 140 | $ 158 | $ 140

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