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Income Taxes - Textuals (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Net operating loss carryforward	$ 986,000	$ 1,100,000
Valuation allowance	0
Taxable temporary difference	2,800,000
Deferred tax liability not recognized	588,000
Subsidiaries [Member] | Investment Tax Credit Carryforward [Member] | Twenty Twenty [Member]
Income Tax Contingency [Line Items]
Gross tax credits related to the Company's CDEs	$ 9,800,000

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