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6) Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
Details                
Net earnings $ 2,013,746 $ 3,238,217 $ 16,925,923 $ 1,096,838 $ 2,485,864 $ 1,860,000 $ 22,177,886 $ 5,442,702
Weighted-average Class A equivalent common share outstanding (1) 16,330,839     16,026,199     16,250,714 15,928,911
GrantOfEmployeeStockOptions $ 223,495     $ 300,093     $ 212,163 $ 331,020
Diluted weighted-average shares outstanding 16,554,334     16,326,292     16,462,877 16,259,931
Net earnings per Class A Equivalent common share (1) $ 0.12     $ 0.07     $ 1.36 $ 0.34
Net earnings per Class A Equivalent common share-assuming dilution (1) $ 0.12     $ 0.07     $ 1.35 $ 0.33