Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued compensation	$ 1,512,885	$ 1,323,138
Contingent consideration payable in stock	0	2,500,000
Accrued research and development expenses	8,415,560	3,944,094
Accrued general and administrative expenses	594,908	367,533
Total accrued expenses	$ 10,523,353	$ 8,134,765