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Accrued Liabilities (Tables)
9 Months Ended
Sep. 30, 2019
Payables and Accruals [Abstract]  
Schedule of Other Accrued Liabilities

Other accrued liabilities at September 30, 2019 and December 31, 2018 include the following:

 

    September 30, 2019     December 31, 2018  
    (Unaudited)        
Amounts due to contract research organizations and other contractual agreements   $ 587,635     $ 749,369  
Accrued payroll and related benefits     1,555,574       1,592,590  
Accrued professional fees     234,154       198,654  
Other     19,410       45,285  
Total   $ 2,396,773     $ 2,585,898