Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current [Abstract]
Accrued contract manufacturing	$ 865,898	$ 655,207
Accrued contract research and regulatory consulting	482,669	418,000
Accrued payroll and payroll taxes	265,533	153,238
Accrued legal	180,500	152,340
Accrued accounting, audit, and tax fees	99,500	147,850
Accrued consulting	77,400	109,073
Accrued license fees	62,936
Accrued miscellaneous expenses	48,545	56,598
Accrued precommercial costs		252,125
Total accrued expenses	$ 2,082,981	$ 1,944,431