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ACCRUED EXPENSES (Details) - 10K - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Accrued expenses:      
Research and development $ 191 $ 93 $ 0
General and administrative 52 441 0
Payroll and related 756 736 33
Other   0 3
Total accrued expenses $ 999 $ 1,270 $ 36