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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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