Other Income (Expense) - Schedule of Other Nonoperating Income (Expense) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair value adjustments on equity investments	$ 26,370,803	$ (5,459,462)	$ 4,797,283
Fair value adjustments on convertible notes receivable		(1,771,420)	13,586,000
Fair value adjustment on put and call options		(132,523)	2,869,342
Fair value adjustments on warrants received	(23,001,771)	4,159,687	37,765,718
Fair value adjustments on variable note receivable	(815,937)	(6,608,790)	(4,206,141)
Fair value adjustment on convertible note payable in connection with RTO			1,981,358
Fair value adjustments on warrants issued	(23,001,771)	4,159,687
Fair value adjustments on contingent consideration	9,877,013	(3,686,921)
Equity earnings in joint ventures	2,319,963	450,000
Other	626,675	802,000	(376,139)
Total Other Income (Expense)	$ 15,376,746	$ (10,318,936)	$ 56,417,421