Income Taxes - Components of Net Loss Before Income Tax Benefit (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. operations	$ (50,735,735)	$ (18,562,738)
Non-U.S. operations	(3,725,766)	(2,015,893)
Net loss before income tax benefit	$ (54,461,501)	$ (20,578,631)