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Note 11 - Product Warranty (Tables)
9 Months Ended
Aug. 31, 2025
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended (Continuing Operations)

 
  

August 31, 2025

  

August 31, 2024

 

Balance, beginning

 $213,929  $196,668 

Provision charged to expense

  77,334   71,426 

Less amounts charged-off

  (70,713)  (52,176)

Balance, ending

 $220,550  $215,918 
  

Nine Months Ended (Continuing Operations)

 
  

August 31, 2025

  

August 31, 2024

 

Balance, beginning

 $225,186  $295,113 

Provision charged to expense

  260,709   250,102 

Less amounts charged-off

  (265,345)  (329,297)

Balance, ending

 $220,550  $215,918