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7. Earnings per Share: Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Details        
Stock options 2,669,034 974,484 0 0
Stock purchase warrants 1,029,486 0 0 0
Incremental shares included in diluted net income 3,698,520 974,484 0 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 9,998,175 13,162,623 16,393,083 21,304,623