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Asset Purchase and License Agreements - License Agreements (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
Jul. 31, 2022
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Research and development   $ 6,876 $ 6,011  
CSPC License Agreement | CSPC Megalith Biopharmaceutical Co., Ltd        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Upfront license fee $ 27,000      
Term of agreement (in years) 10 years      
Number of days written prior notice to terminate agreement 180 days      
CSPC License Agreement | CSPC Megalith Biopharmaceutical Co., Ltd | Maximum        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Development and regulatory milestone payments $ 148,000      
Commercial milestone payments 1,000,000      
Payments as percentage of non-royalty sublicense income $ 50,000      
Synaffix License Agreement        
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]        
Commercial milestone payments       $ 365,500
Research and development   $ 0 $ 0