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Short-term Investments - Stated Maturities of Marketable Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Amortized Cost |  |
Due within one year | $ 72,508 | $ 90,438
Due after one year through four years | 156,186 | 177,278
Amortized Cost | 228,694 | 267,716
Estimated Fair Value |  |
Due within one year | 72,482 | 90,533
Due after one year through four years | 155,842 | 178,191
Total | $ 228,324 | $ 268,724

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