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12) Capital Stock: Share-based Compensation, Stock Options, Activity (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Common Class A |  |  |
Common Stock, Shares, Outstanding | 15,304,798 | 14,535,577 | 13,819,006
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 38,473 | 8,183 |
Dividends | $ 730,560 | $ 692,635 |
Conversion of Stock, Shares Issued | 188 | 15,753 |
Common Class C |  |  |
Common Stock, Shares, Outstanding | 2,193,643 | 2,089,374 | 1,902,229
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period | 0 | 103,402 |
Dividends | $ 104,457 | $ 99,496 |
Conversion of Stock, Shares Issued | (188) | (15,753) |

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