Effective income tax rate reconciliation, interest expense.

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Effective income tax rate reconciliation, interest expense, percentage.

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Effective income tax rate reconciliation, unearned revenue.

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Effective income tax rate reconciliation, unearned revenue, percentage.

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Amount of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Percentage of difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to expense for award under share-based payment arrangement. Excludes expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Schedule of Tax Benefit and Effective Income Tax (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal benefit expected at statutory rate					$ (18,694,437)	$ (12,188,924)
Federal benefit expected at statutory rate, percentage					21.00%	21.00%
State and local taxes, net of federal benefit					$ (5,279,879)	$ (3,053,709)
State and local taxes, net of federal benefit, percentage					5.90%	5.30%
Stock-based compensation					$ 1,768,735	$ 1,591,202
Stock based compensation, percentage					(2.00%)	(2.70%)
Unearned revenue					$ (5,120,330)	$ (1,969,056)
Unearned revenue, percentage					5.80%	3.40%
Interest expense					$ 1,173,535	$ 1,015,199
Interest expense, percentage					(1.30%)	(1.70%)
Other differences, net					$ 152,294	$ 199,643
Other differences, net, percentage					(0.20%)	(0.40%)
Valuation allowance					$ 26,168,671	$ (6,685,348)
Valuation allowance, percentage					(29.40%)	11.50%
Other permanent differences					$ 42,243	$ 1,549,866
Other permanent differences, percentage					0.00%	(2.70%)
Tax provision (benefit) and effective income tax rate	$ (229,699)		$ (229,699)		$ 210,832	$ (19,541,127)
Tax provision (benefit) and effective income tax rate, percentage			0.29%	0.00%	(0.20%)	33.70%