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Collaboration and License Agreements - Joint Venture and License Agreement with Visirna Therapeutics, Inc. (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Apr. 25, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2022
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |
Proceeds from investment in joint venture |  |  |  | $ 0 | $ 60,000 |
Revenue |  | $ 15,825 | $ 32,412 | 224,638 | $ 211,656 |
Deferred revenue |  | 16,905 |  | 16,905 |  | $ 74,099
Visirna Therapeutics, Inc. | Visirna License Agreement |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |
Revenue |  |  |  | 900 |  |
Contract assets |  | 0 |  | 0 |  |
Deferred revenue |  | $ 0 |  | $ 0 |  |
Visirna Therapeutics, Inc. | Visirna License Agreement | Variable Interest Entity, Primary Beneficiary |  |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |  |
Proceeds from investment in joint venture | $ 60,000 |  |  |  |  |

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