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Other Accrued Liabilities - Schedule of Other Accrued Liabilities (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Amounts due to contract research organizations and other contractual agreements $ 636,000 $ 475,440
Accrued payroll and related benefits 1,336,271 1,604,541
Accrued professional fees 66,850 204,155
Other 19,411 19,411
Total $ 2,458,532 $ 2,303,547