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Collaboration and License Agreements - Visirna Therapeutics, Inc. (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Revenue | $ 0 | $ 146,267 | $ 3,551 | $ 208,813 |
Deferred revenue | 0 |  | 0 |  | $ 866
Visirna Therapeutics, Inc. | Visirna License Agreement |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Revenue | 100 | $ 900 |  |  |
Contract assets | 0 |  | 0 |  |
Deferred revenue | $ 0 |  | $ 0 |  |

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