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Fair Value Measurements (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Measurements |  |
Short-term investments (U.S. Government Securities and Agency Investments) | $ 338,851 | $ 246,571
Recurring | Estimate of fair value measurement |  |
Fair Value Measurements |  |
Total | 457,518 | 382,018
Recurring | Money market funds, U.S. Government Securities and Agency Investments | Estimate of fair value measurement |  |
Fair Value Measurements |  |
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments) | 118,278 | 136,771
Recurring | U.S. Government Securities and Agency Investments | Estimate of fair value measurement |  |
Fair Value Measurements |  |
Short-term investments (U.S. Government Securities and Agency Investments) | 339,240 | 245,247
Recurring | Level 1 |  |
Fair Value Measurements |  |
Total | 457,518 | 357,018
Recurring | Level 1 | Money market funds, U.S. Government Securities and Agency Investments |  |
Fair Value Measurements |  |
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments) | 118,278 | 111,771
Recurring | Level 1 | U.S. Government Securities and Agency Investments |  |
Fair Value Measurements |  |
Short-term investments (U.S. Government Securities and Agency Investments) | $ 339,240 | 245,247
Recurring | Level 2 |  |
Fair Value Measurements |  |
Total |  | 25,000
Recurring | Level 2 | Money market funds, U.S. Government Securities and Agency Investments |  |
Fair Value Measurements |  |
Cash equivalents (money market funds, U.S. Government Securities and Agency Investments) |  | $ 25,000

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. All of the above and Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current. + References No definition available. + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-3 + Details
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