Income Taxes - Components of Income Tax Benefits (Detail)	12 Months Ended
Dec. 31, 2020 USD ($)
U.S. federal
Current	$ 4,706,092
U.S. state and local
Current	710,932
Income tax benefit	$ 5,417,024

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration