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Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Details    
Expected tax at U.S. statutory rate $ 1,206,000 $ 861,000
Expected tax at U.S. statutory rate, % 34.00% 34.00%
Permanent differences $ (49,000) $ (40,000)
Permanent differences, % (1.40%) (1.60%)
State taxes, net of federal benefit $ 34,000 $ 23,000
State taxes, net of federal benefit, % 1.00% 0.90%
Income tax expense $ 1,191,000 $ 844,000
Income tax expense, % 33.60% 33.30%