Income Taxes - Summary of Income Tax Expenses (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 65,118,212	$ 18,095,946	$ 2,842,696
State	16,640,086	4,665,000	279,899
Foreign
Total Current	81,758,298	22,760,946	3,122,595
Deferred:
Federal	3,520,293	(12,535,000)	3,330,000
State	(1,425,789)	(881,913)	731,000
Foreign
Total Deferred	2,094,504	(13,416,913)	4,061,000
Total	$ 83,852,802	$ 9,344,033	$ 7,183,595