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Related Parties (Narrative) (Details) - USD ($)
12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
Aug. 31, 2016
Related Parties [Abstract]      
Sales to Tractor Supply $ 1,400,000 $ 1,200,000 $ 1,200,000
Accounts receivable from Tractor Supply $ 500,000 $ 0