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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Increase (decrease) in valuation allowance $ 41,000 $ 0  
Income tax expense (benefit) 0 0 $ 0
Unrecognized tax benefits 0 0 0
Income tax penalties and interest accrued 0 $ 0 $ 0
Significant change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit $ 0