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Note 11 - Product Warranty (Tables)
9 Months Ended
Aug. 31, 2024
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended (Continuing Operations)

 
  

August 31, 2024

  

August 31, 2023

 

Balance, beginning

 $196,668  $252,444 

Provision charged to expense

  71,426   114,074 

Less amounts charged-off

  (52,176)  (102,485)

Balance, ending

 $215,918  $264,033 
  

Nine Months Ended (Continuing Operations)

 
  

August 31, 2024

  

August 31, 2023

 

Balance, beginning

 $295,113  $192,301 

Provision charged to expense

  250,102   345,409 

Less amounts charged-off

  (329,297)  (273,677)

Balance, ending

 $215,918  $264,033