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11. Stock Options: Share-based Compensation, Activity (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Details        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 7,054,500 7,054,500 7,662,500 7,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period   (500,000) (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, Exercises in Period, Intrinsic Value $ (108,000)      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 6,792,000 6,792,000