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Income Taxes (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
U.S. Federal income tax rate |  | 21.00% | 35.00%
Tax Cuts And Jobs Act [Member] |  |  |
U.S. Federal income tax rate |  | 21.00% |
Deferred tax asset |  |  | $ 871,000
Income tax expense | $ 871,000 |  |

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- Definition Amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
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