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Related Party Transactions - Expenses related to Related Party which were Settled in Cash (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Related Party | Reimbursable Costs Under Paragon Agreement | Research and Development Expense |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Reimbursable costs | $ 16.7 | $ 0.0 | $ 17.9 | $ 0.0

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