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Cash and Investments in Marketable Securities - Cash and Investments in Marketable Securities, Including Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Estimated Fair Value at    
Cash and cash equivalents $ 35,277 $ 88,227
Short-term investments 268,339 416,750
Long-term investments 25,825 0
Total cash and investments in marketable securities $ 329,441 $ 504,977