Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Accounts Payable And Accrued Liabilities Current [Abstract]
Accrued contract manufacturing	$ 290,619	$ 655,207
Accrued contract research and regulatory consulting	270,250	418,000
Accrued payroll and payroll taxes	233,340	153,238
Accrued accounting, audit, and tax fees	70,850	147,850
Accrued miscellaneous expenses	68,834	56,598
Accrued license fees	61,156
Accrued legal	153,500	152,340
Accrued consulting	22,615	109,073
Accrued pre-commercial costs		252,125
Total accrued expenses	$ 1,171,164	$ 1,944,431