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Financial Instruments - Schedule of Cash and Cash Equivalents, Money Market Funds and Short-term Investments by Significant Investment Category (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | $ 422,021 | $ 487,907
Unrealized Gains | 25 | 822
Unrealized Losses | (642) | (477)
Market Value | 421,404 | 488,252
Short-term investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 356,838 | 430,666
Unrealized Gains | 25 | 822
Unrealized Losses | (642) | (477)
Market Value | 356,221 | 431,011
Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 65,183 | 57,241
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Market Value | 65,183 | 57,241
Level 1 | Money Market Funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 51,207 | 57,241
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Market Value | 51,207 | 57,241
Level 2 | U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 20,687 | 27,250
Unrealized Gains | 0 | 46
Unrealized Losses | (25) | (8)
Market Value | 20,662 | 27,288
Level 2 | U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 114,517 | 133,655
Unrealized Gains | 11 | 563
Unrealized Losses | (250) | (132)
Market Value | 114,278 | 134,086
Level 2 | Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 235,610 | 269,761
Unrealized Gains | 14 | 213
Unrealized Losses | (367) | (337)
Market Value | $ 235,257 | $ 269,637

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