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Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2025
Related Party Transactions [Abstract]  
Schedule of 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,
202520242023
Reimbursable costs under the Paragon Agreement$0.1 $15.3 $37.1 
License Agreements milestone and sublicensing fees10.4 10.2 — 
Total related party expense (excludes stock comp)$10.5 $25.5 $37.1 
Schedule of Related Party Accounts Payable
The following is the summary of Related party accounts payable and other current liabilities (in millions):
December 31,
20252024
Reimbursable costs under the Paragon Agreement$— $0.1 
License Agreements development milestone liability (see Note 9)
— 0.5 
Total related party accounts payable$— $0.6