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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
  
Clinical expenses
    $ 1,500      $ 1,517  
Compensation, excluding taxes
      1,228        893  
Short-term financing
      79        551  
Professional fees
      1,977        603  
Interest on convertible note
      473        393  
Other
      160        152  
    
 
 
     
 
 
  
Total accrued expenses
    $ 5,417      $ 4,109