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Note 14 - Supplemental Cash Flow Information (Tables)
 9 Months Ended
May 31, 2020
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Three Months Ended
    May 31, 2020   May 31, 2019
Cash paid for interest   $
10,724
     $
5,165
  
Cash paid for income taxes    
—
      
—
  
    Nine Months Ended
    May 31, 2020   May 31, 2019
Cash paid for interest   $
20,101
     $
11,357
  
Cash paid for income taxes    
—
      
53,975