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Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2022
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses

As of December 31, 2022 and 2021, accrued expenses consist of the following:

 

   2022   2021 
   December 31, 
(In thousands)  2022   2021 
Accrued compensation costs  $391   $525 
Accrued professional fees   62    84 
Accrued research and development   56    60 
Other   59    60 
Accrued expenses  $568   $729