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Investments- Fair Value of the Company's Investments by Type (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized Cost | $ 246,858 | $ 138,196
Accrued Interest | 49 | 487
Gross Unrealized Gains | 3 | 0
Gross Unrealized Losses | (225) | (1,063)
Estimated Fair Value | $ 246,685 | $ 137,620
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] | Investments, Long-term investments | Investments, Long-term investments
Obligations of U.S. Government and its agencies |  |
Marketable Securities [Line Items] |  |
Amortized Cost | $ 243,810 | $ 129,940
Accrued Interest | 37 | 427
Gross Unrealized Gains | 3 | 0
Gross Unrealized Losses | (212) | (996)
Estimated Fair Value | 243,638 | 129,371
Corporate debt securities |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 2,068 | 6,093
Accrued Interest | 6 | 37
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | (38)
Estimated Fair Value | 2,074 | 6,092
Certificates of deposit |  |
Marketable Securities [Line Items] |  |
Amortized Cost | 980 | 2,163
Accrued Interest | 6 | 23
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (13) | (29)
Estimated Fair Value | $ 973 | $ 2,157

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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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