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Cash and Investments in Marketable Securities - Cash and Investments in Marketable Securities, Including Cash Equivalents (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Estimated Fair Value at    
Cash and cash equivalents $ 48,642 $ 35,277
Short-term investments 240,596 268,339
Long-term investments 36,778 25,825
Total cash and investments in marketable securities $ 326,016 $ 329,441