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Income Taxes (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Amount of retained earnings which has no provision for federal income taxes | $ 5,095,000 |  |
Unrecorded deferred income tax liability | 1,070,000 |  |
Net operating loss carryforwards which expire from 2021 through 2039 | 20,207,000 |  |
Unrecognized tax benefits | 0 | $ 0 | $ 0
Increase in unrecognized tax benefits relative to tax positions taken | 0 | 0 | 0
Accrual of unrecognized tax benefit, income tax penalties and interest accrued | $ 0 | $ 0 | $ 0

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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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