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Related Party Transactions (Tables)
 9 Months Ended
Sep. 30, 2025
Related Party Transactions [Abstract]  
Schedule of Expenses Related to Related Party Which are 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
September 30,		Nine Months Ended
September 30,
2025202420252024
Reimbursable costs under the Paragon Agreement$— $1.3 $0.1 $15.3 
License Agreements milestone and sublicensing fees7.0 0.3 9.5 5.9 
Total related party expense (excludes stock-based compensation)$7.0 $1.6 $9.6 $21.2 
Schedule of Related Party Accounts Payable and Other Current Liabilities
The following is the summary of Related party accounts payable and other current liabilities (in millions):
September 30,
2025		December 31,
2024
Reimbursable costs under the Paragon Agreement$— $0.1 
License Agreements development milestone liability (see Note 6)4.0 0.5 
Total related party accounts payable$4.0 $0.6