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3 - Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Details    
Expected tax at U.S. statutory rate $ 143,000 $ 537,000
Expected tax at U.S. statutory rate, % 21.00% 21.00%
Permanent differences $ (6,000) $ 2,000
Permanent differences, % (1.00%) 0.10%
State taxes, net of federal benefit $ 8,000 $ 16,000
State taxes, net of federal benefit, % 1.20% 0.60%
Income tax expense $ 145,000 $ 555,000
Income tax expense, % 21.20% 21.70%