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Marketable Securities - Available-for-sale Securities by Major Security Type (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Marketable Securities [Line Items] |  |
Amortized cost | $ 4,080 | $ 4,412
Gross unrealized holding gains | 9 | 7
Gross unrealized holding losses | (2) | (23)
Estimated fair value | 4,087 | 4,396
US Treasury securities [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 1,298 | 1,804
Gross unrealized holding gains | 0 | 0
Gross unrealized holding losses | 0 | (1)
Estimated fair value | 1,298 | 1,803
Mutual funds [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 2,116 | 1,498
Gross unrealized holding gains | 9 | 7
Gross unrealized holding losses | (2) | 0
Estimated fair value | 2,123 | 1,505
Certificates of deposit [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 413 | 103
Gross unrealized holding gains | 0 | 0
Gross unrealized holding losses | 0 | 0
Estimated fair value | 413 | 103
Corporate debt securities [Member] |  |
Marketable Securities [Line Items] |  |
Amortized cost | 253 | 1,007
Gross unrealized holding gains | 0 | 0
Gross unrealized holding losses | 0 | (22)
Estimated fair value | $ 253 | $ 985

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- Definition The amount of accumulated gross unrealized gain on investment in marketable securities classified as available-for-sale securities. + References No definition available. + Details
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- Definition The amount of accumulated gross unrealized loss on investment in marketable securities classified as available-for-sale securities. + References No definition available. + Details
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- Definition Amount of investment in marketable security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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