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Accrued and Other Current Liabilities
 12 Months Ended
Dec. 31, 2023
Payables and Accruals [Abstract]  
Accrued and Other Current Liabilities

7. Accrued and Other Current Liabilities

 

Accrued and other current liabilities consist of the following:

 

   2023   2022 
   December 31, 
   2023   2022 
   (in thousands) 
Advisory costs  $325   $300 
Legal costs   

—

    135 
Audit services   70    80 
Payroll   79    55 
Other liabilities   1    12 
Total expenses  $475   $582