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Accrued Expenses (Tables)
 6 Months Ended
Jun. 30, 2022
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses

Accrued expenses consist of the following:

           
   (in thousands) 
   June 30, 2022   December 31, 2021 
Compensation  $28   $1 
Professional fees   344    169 
Clinical trial expenses   —    61 
Other expenses   130    207 
Accrued expenses  $502   $438