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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Accrued Liabilities Current [Abstract]    
Accrued professional fees $ 1,255,494 $ 1,273,249
Accrued bonuses 804,082 2,152,264
Other accrued expenses 1,277,803 948,588
Accrued expenses $ 3,337,379 $ 4,374,101