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11. Stockholders' Equity: Common Stock Purchase Warrant Transactions (Details) - shares
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Details      
Class of Warrant or Right, Outstanding 6,333,334 12,900,123 14,100,123
Warrants Exercised   (1,200,000)  
Warrants Expired (6,566,789)