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Cash, Cash Equivalents and Short-Term Investments - Equity investments (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Cash, Cash Equivalents and Short-Term Investments    
Investments in equity securities $ 100,100  
Net losses recognized during the six months on equity securities (1,026) $ (1,405)
Less: net gains (losses) recognized during the year on equity securities sold during the period   1,510
Unrealized gains (losses) recognized during the six months on equity securities still held at June 30, 2024 and 2023 $ (1,026) $ 105