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Note 6 - Patents and Trademarks, Net (Tables)
9 Months Ended
May 31, 2022
Patents and Trademarks [Member]  
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

May 31, 2022

  

August 31, 2021

 

Patents and trademarks

 $3,183,500  $3,018,507 

Less accumulated amortization

  (2,465,705)  (2,308,935)
  $717,795  $709,572