The amount of federal net operating loss carryforwards utilized to date.

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The percentage of alternate minimum tax credit carryforwards eligible for refund under the U.S. Tax Cuts and Jobs Act.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of tax expense (benefit) for an increase (decrease) to a gain (loss) previously reported in discontinued operations in a prior period.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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Description of the limitation related to use of the tax credit carryforward.

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No definition available.

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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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Income Taxes - Additional information (Details) - USD ($)	1 Months Ended		3 Months Ended
	Jul. 31, 2020	Oct. 31, 2019	Mar. 31, 2021	Dec. 31, 2017
Tax Credit Carryforward, Limitations on Use			Pursuant to the tax legislation known as the Tax Cuts and Jobs Act (the "TCJA") of 2017, corporate alternative minimum tax (“AMT”) credit carryforwards are eligible for a 50% refund in tax years 2018 through 2020
Tax Credit Carryforward, Valuation Allowance				$ 3,100,000
Refund received	$ 1,500,000	$ 1,600,000
Federal NOLs utilized to date			$ 23.9
Valuation Allowance			$ 62,400,000
Tax Year 2018 to 2020 [Member]
AMT credit carryforwards, percentage eligible for refund pursuant to U.S. Tax Cuts and Jobs Act			50.00%
Tax Year 2021 [Member]
AMT credit carryforwards, percentage eligible for refund pursuant to U.S. Tax Cuts and Jobs Act			100.00%
Loans and Finance Receivables [Member]
Deferred Income Tax Assets, Net				$ 3,100,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards			$ 127,500,000
Federal [Member]
Operating Loss Carryforwards			236,300,000
New York State [Member]
Discontinued Operation, Tax Effect of Adjustment to Prior Period Gain (Loss) on Disposal			23,600,000
New York City [Member]
Discontinued Operation, Tax Effect of Adjustment to Prior Period Gain (Loss) on Disposal			$ 18,000,000.0