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10. Stockholders' Equity: Schedule of stock purchase warrant activity (Details) - shares
Sep. 30, 2018
Jun. 30, 2018
Dec. 31, 2017
Dec. 31, 2016
Details        
Class of Warrant or Right, Outstanding 13,725,123 13,725,123 9,295,834 10,737,500
Warrants issued in private placement 4,429,289   7,558,334  
Warrants expired     (9,000,000)