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Related Party Transactions (Tables)
 3 Months Ended
Mar. 31, 2025
Related Party Transactions [Abstract]  
Expenses related to Related Party which were Settled in Cash
The following is the summary of expenses related to the Paragon Agreement and License Agreements, which are ultimately settled in cash (in millions) and recorded within Research and development in the consolidated statement of operations for the periods presented:
Three Months Ended
March 31,
20252024
Reimbursable costs under the Paragon Agreement$— $11.7 
License Agreements milestone and sublicensing fees2.5 — 
Total related party expense (excludes stock-based compensation)$2.5 $11.7 
Related Party Accounts Payable
The following is the summary of Related party accounts payable and other current liabilities (in millions):
March 31,
2025		December 31,
2024
Reimbursable costs under the Paragon Agreement$— $0.1 
License Agreements development milestone liability (see Note 6)2.5 0.5 
Total related party accounts payable$2.5 $0.6