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License and Research Agreements - Schedule of Changes in Fair Value of Equity Investment (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]    
Common stock, Beginning balance $ 749,239  
Common stock, Ending balance 556,749 $ 749,239
Solid and Arcturus | Common Stock    
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]    
Common stock, Beginning balance 3,204 2,807
Common stock, Change in fair value 3,746 397
Common stock, Ending balance $ 6,950 $ 3,204