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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Accrued Liabilities [Abstract]    
Salaries, employee benefits and related taxes $ 1,173 $ 2,586
Operating lease liabilities — current 156 180
D&O insurance liabilities 956 0
Clinical and R&D related liabilities 1,334 785
Other 326 177
Total accrued liabilities $ 3,945 $ 3,728