Property, Plant and Equipment: Property, Plant and Equipment, Estimated Useful Lives (Details)	9 Months Ended
	May 31, 2017
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