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Note 11 - Product Warranty (Tables)
3 Months Ended
Feb. 28, 2025
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended (Continuing Operations)

 
  

February 28, 2025

  

February 29, 2024

 

Balance, beginning

 $225,186  $295,113 

Provision charged to expense

  85,040   83,735 

Less amounts charged-off

  (119,395)  (167,728)

Balance, ending

 $190,831  $211,120