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Accrued and Other Current Liabilities (Tables)
9 Months Ended
Sep. 30, 2023
Payables and Accruals [Abstract]  
Schedule of Accrued and Other Current Liabilities

Accrued and other current liabilities consist of the following:

 

   September 30,   December 31, 
   2023   2022 
   (in thousands) 
Research and development  $39   $ 
Advisory costs         300          300 
Legal costs       135 
Audit services   84    80 
Payroll   110    55 
Other liabilities   6    12 
Total accrued and other current liabilities  $539   $582