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Accrued Expenses (Tables)
 6 Months Ended
Jun. 30, 2021
Payables and Accruals [Abstract]  
Schedule of accrued expenses
   June 30,   December 31, 
   2021   2020 
Consulting fees  $718,958   $1,718,559 
Professional fees   420,935    1,261,751 
Employee and director compensation   363,878    878,292 
Research and development fees   70,000    17,817 
Interest   113,254    184,576 
Settlement of Alpha Capital Note(1)   47,169    
-
 
Travel expenses   
-
    4,600 
Other   174,993    45,321 
   $1,909,187   $4,110,916 

 

(1)

See Note 8, Commitments and Contingencies, Convertible Promissory Note.