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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2024
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:
Year Ended December 31,
202420232022
Reimbursable costs under the Paragon Agreement$15.3 $37.1 $— 
License Agreements milestone and sublicensing fees10.2 — — 
Total related party expense (excludes stock comp)$25.5 $37.1 $— 
Related Party Accounts Payable
The following is the summary of Related party accounts payable and other current liabilities (in millions):
December 31,
20242023
Reimbursable costs under the Paragon Agreement$0.1 $16.6 
License Agreements development milestone liability (see Note 9)
0.5 — 
Total related party accounts payable$0.6 $16.6