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Cash, Cash Equivalents and Short-Term Investments - Available-for-sale Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Cash, Cash Equivalents and Short-Term Investments |  |
Amortized Cost | $ 279,370 | $ 302,581
Unrealized Gains | 1,893 | 6,764
Unrealized Losses | (638) | (22)
Fair Value | 280,625 | 309,323
U.S. Treasury notes |  |
Cash, Cash Equivalents and Short-Term Investments |  |
Amortized Cost | 125,636 | 133,989
Unrealized Gains | 884 | 2,697
Unrealized Losses | (339) | (21)
Fair Value | 126,181 | 136,665
Corporate debt securities |  |
Cash, Cash Equivalents and Short-Term Investments |  |
Amortized Cost | 153,734 | 168,592
Unrealized Gains | 1,008 | 4,067
Unrealized Losses | (299) | (1)
Fair Value | $ 154,444 | $ 172,658

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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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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of 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 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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