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v3.24.1.1.u2

Fair value measurements (Details) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Marketable securities: |  |
Available-for-sale securities, Debt Securities, Current, Total | $ 2,982,000 | $ 2,947,000
Recurring basis |  |
Marketable securities: |  |
Available-for-sale securities, Debt Securities, Current, Total | 2,982,000 |
Recurring basis | U.S. Treasury securities |  |
Marketable securities: |  |
Available-for-sale securities, Debt Securities, Current, Total | 2,982,000 |
Recurring basis | Level 1 |  |
Marketable securities: |  |
Available-for-sale securities, Debt Securities, Current, Total | 2,982,000 |
Recurring basis | Level 1 | U.S. Treasury securities |  |
Marketable securities: |  |
Available-for-sale securities, Debt Securities, Current, Total | $ 2,982,000 |

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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), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-2 Reference 2: 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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