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Cash and Cash Equivalents (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Cash and Cash Equivalents [Abstract] |  |
Savings and checking accounts at major U.S. financial institutions | $ 367 | $ 1,312
U.S. Treasury securities money market fund | 8,189 | 0
Total | $ 8,556 | $ 1,312

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