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Note 16 - Statements of Cash Flows (Tables)
 12 Months Ended
Aug. 31, 2020
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Fiscal Year Ended
August 31,
    2020   2019
Cash paid during the year for income tax   $
1,099,635
     $
841,837
  
Cash paid during the year for interest    
16,034
      
13,567
  
                 
Non-cash investing and financing activities:                
Purchases of property and equipment included in accounts payable    
—
      
53,512