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Collaboration and License Agreements - Takeda Pharmaceutical Company Limited (Details) | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Jan. 31, 2021 USD ($) | Oct. 31, 2020 bundle | Mar. 31, 2025 USD ($) | Sep. 30, 2024 USD ($) | Mar. 31, 2023 USD ($)
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Development regulatory and sales milestones payments |  |  | $ 13,300,000,000 |  |
Deferred revenue |  |  | 43,268,000 | $ 0 |
Accrued expenses |  |  | 78,450,000 | $ 63,017,000 |
Takeda | License and Co-Funding Agreement |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Number of distinct bundle | bundle |  | 1 |  |  |
Initial transaction price | $ 300,000,000 |  |  |  |
Milestone payment |  |  |  |  | $ 40,000,000
Deferred revenue |  |  | 0 |  |
Accrued expenses |  |  | 28,800,000 |  |
Takeda | License and Co-Funding Agreement | Minimum |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Percentage of eligible to receive tiered royalties on net sales |  | 20.00% |  |  |
Takeda | License and Co-Funding Agreement | Maximum |  |  |  |  |
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items] |  |  |  |  |
Percentage of eligible to receive tiered royalties on net sales |  | 25.00% |  |  |
Development regulatory and sales milestones payments |  |  | $ 527,500,000 |  |

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