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2. Significant Accounting Policies: Property, Plant and Equipment: Property, Plant and Equipment, Estimated Useful Lives (Details)
 12 Months Ended
Aug. 31, 2018
Minimum  
Office equipment, expected useful lives in years 3
Warehouse equipment, expected useful lives in years 2
Buildings, expected useful lives in years 5
Maximum  
Office equipment, expected useful lives in years 7
Warehouse equipment, expected useful lives in years 10
Buildings, expected useful lives in years 30