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Accrued Liabilities (Tables)
9 Months Ended
Sep. 30, 2021
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities

Other accrued liabilities at September 30, 2021 and December 31, 2020 include the following:

 

   September 30, 2021   December 31, 2020 
Amounts due to contract research organizations and other contractual agreements  $1,276,317   $636,000 
Accrued payroll and related benefits   1,247,460    1,736,271 
Accrued professional fees   265,350    66,850 
Accrued interest   16,250    - 
Other   19,411    19,411 
Total  $2,824,788   $2,458,532