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Other Current Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Other Current Assets |  |  |
Deposits | $ 1,193 | $ 1,209 | $ 1,962
Prepaid expenses | 592 | 683 | 102
Other receivables | 39 | 39 | 1,011
Total other current assets | $ 1,824 | $ 1,931 | $ 3,075

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