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Cash, Cash Equivalents and Short-Term Investments - Equity investments (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash, Cash Equivalents and Short-Term Investments    
Investments in equity securities $ 100,000  
Net losses recognized during the nine months on equity securities (1,026) $ (3,765)
Less: net gains recognized during the year on equity securities sold during the period 2,471 1,510
Unrealized gains (losses) recognized during the nine months on equity securities still held at September 30, 2024 and 2023 $ 1,445 $ (2,255)