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11. Equity: Share-based Compensation, Stock Options, Activity (Details) - shares
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Details      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 5,262,500 7,054,500 7,662,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 2,100,000 (108,000)  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (3,892,000) (500,000)  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 5,262,500 7,054,500 7,662,500