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

Other accrued liabilities at June 30, 2020 and December 31, 2019 include the following:

 

    June 30, 2020     December 31, 2019  
             
Amounts due to contract research organizations and other contractual agreements   $ 284,000     $ 475,440  
Accrued payroll and related benefits     1,054,272       1,604,541  
Accrued professional fees     150,000       204,155  
Other     19,411       19,411  
Total   $ 1,507,683     $ 2,303,547