Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities And Other Liabilities [Abstract]
Accrued research and development	$ 4,293,522	$ 8,209,594
Accrued compensation	2,870,261	2,056,356
Accrued general and administrative	1,155,508	554,011
Accrued Interest	393,958	129,167
Total	$ 8,713,249	$ 10,949,128