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Related Parties (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
May 31, 2017
May 31, 2016
May 31, 2017
May 31, 2016
Related Parties [Abstract]        
Sales to Tractor Supply $ 300,000 $ 400,000 $ 800,000 $ 800,000
Accounts receivable from Tractor Supply $ 0   $ 0