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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