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Note 9 - Product Warranty (Tables)
12 Months Ended
Nov. 30, 2023
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

For the Twelve Months Ended

 
  

November 30, 2023

  

November 30, 2022

 

Balance, beginning

 $192,301  $201,850 

Settlements / adjustments

  (330,951)  (349,889)

Warranties issued

  433,763   340,340 

Balance, ending

 $295,113  $192,301