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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 | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | $ 382,686 | $ 487,907
Unrealized Gains | 888 | 822
Unrealized Losses | (40) | (477)
Market Value | 383,534 | 488,252
Cash Equivalents |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 58,637 | 57,241
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Market Value | 58,637 | 57,241
Level 1 | Money Market Funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 52,660 | 57,241
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Market Value | 52,660 | 57,241
U.S. Treasury securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 16,868 | 27,250
Unrealized Gains | 20 | 46
Unrealized Losses | 0 | (8)
Market Value | 16,888 | 27,288
U.S. Government agency securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 88,460 | 133,655
Unrealized Gains | 479 | 563
Unrealized Losses | (2) | (132)
Market Value | 88,937 | 134,086
Corporate debt securities | Level 2 |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 224,698 | 269,761
Unrealized Gains | 389 | 213
Unrealized Losses | (38) | (337)
Market Value | 225,049 | 269,637
Short-term investments |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost | 324,049 | 430,666
Unrealized Gains | 888 | 822
Unrealized Losses | (40) | (477)
Market Value | $ 324,897 | $ 431,011

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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