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Fair Value Measurement - Held-to-maturity debt securities at amortized cost (Details) - US Treasury Securities [Member] - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Amortized Cost | $ 100,488 | $ 129,113
Unrealized Gains | 24 | 28
Unrealized Losses | (1) | 0
Aggregate Fair Value | $ 100,511 | $ 129,141

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- Definition Amount of cumulative unrecognized loss on investment in debt security measured at amortized cost (held-to-maturity) and 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/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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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