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LICENSE, COLLABORATION AND OTHER REVENUE - Revenues Recognized From License, Collaboration and Other Significant Agreements (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 11, 2015 | Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2023
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | $ 57,336 | $ 32,607 |
MTPC |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues | $ 7,300 |  |  |
License, collaboration and other revenue |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | 1,545 | 1,598 |
License, collaboration and other revenue | Medice |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | 7 | 0 | $ 10,000
License, collaboration and other revenue | MTPC |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | 369 | 412 |
License, collaboration and other revenue | JT and Torii |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | 1,169 | 1,186 |
License, collaboration and other revenue | Total license and other revenue |  |  |  |
License Collaboration And Other Revenue [Abstract] |  |  |  |
Total revenues |  | $ 1,545 | $ 1,598 |

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