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11. Stock Options: Share-based Compensation, Stock Options, Activity (Details) - shares
12 Months Ended
Dec. 31, 2017
Mar. 31, 2018
Dec. 31, 2016
Details      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 7,662,500 7,662,500 7,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (500,000)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 662,500    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number   7,000,000