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Fair Value Measurements - Financial Assets Measured At Fair Value On A Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financial Assets: |  |
Debt securities, available-for-sale | $ 31,416 | $ 49,987
Level 1 | Fair Value, Recurring |  |
Financial Assets: |  |
Debt securities, available-for-sale | 3,965 | 9,881
Total | 87,461 | 66,439
Level 2 | Fair Value, Recurring |  |
Financial Assets: |  |
Debt securities, available-for-sale | 27,451 | 40,106
Total | 27,451 | 40,106
Level 3 | Fair Value, Recurring |  |
Financial Assets: |  |
Debt securities, available-for-sale | 0 | 0
Total | 0 | 0
Cash | Level 1 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | 77,307 | 38,862
Cash | Level 2 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | 0 | 0
Cash | Level 3 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | 0 | 0
Money market mutual fund | Level 1 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | 6,189 | 17,696
Money market mutual fund | Level 2 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | 0 | 0
Money market mutual fund | Level 3 | Fair Value, Recurring |  |
Financial Assets: |  |
Cash and cash equivalents | $ 0 | $ 0

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount 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 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: 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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- 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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