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6) Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Details            
Net earnings $ 3,480,054 $ 1,930,318 $ 3,238,217 $ 16,925,923 $ 5,410,372 $ 20,164,140
Weighted Average Number of Shares Outstanding, Basic 17,255,902   17,074,815   17,247,778 17,031,804
GrantOfEmployeeStockOptions $ 217,902   $ 245,774   $ 222,948 $ 217,732
Diluted weighted-average shares outstanding 17,473,804   17,320,589   17,470,726 17,249,536
Earnings Per Share, Basic $ 0.20   $ 0.19   $ 0.31 $ 1.18
Earnings Per Share, Diluted $ 0.20   $ 0.19   $ 0.31 $ 1.17