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Related Party Arrangements (Details) - Chief Executive Officer [Member] - USD ($) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Related Party Arrangements [Line Items] |  |  |  |  |
Related party expense |  | $ 0 | $ 108,000 | $ (91,000) | $ 432,000
Payment of unrestricted research grants | $ 125,000 |  |  | $ 125,000 |

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