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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
U.S. Federal income tax rate   34.00% 34.00%
Tax Cuts And Jobs Act [Member]      
U.S. Federal income tax rate 21.00%    
Deferred tax asset   $ 871,000  
Income tax expense   $ 871,000