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13. Stock Options: Share-based Compensation, Stock Options, Activity (Details) - USD ($)
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Details        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 5,525,000   2,100,000 5,262,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value $ (725,000) $ (1,150,000)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (2,012,500)      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 4,150,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 5,525,000