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Accrued Expenses (Tables)
3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Schedule of accrued expenses
Accrued expenses consist of the following (in thousands):
 
 
  
March 31,
2022
 
  
December 31,
2021
 
Clinical expenses
   $ 1,578      $ 1,517  
Compensation, excluding taxes
     796        893  
Short term financing
     315        551  
Professional fees
     1,298        603  
Interest on convertible note
     433        393  
Other
     75        152  
    
 
 
    
 
 
 
Total accrued expenses
   $ 4,495      $ 4,109