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

Three Months Ended (Continuing Operations)

 
  

May 31, 2024

  

May 31, 2023

 

Balance, beginning

 $211,121  $193,464 

Provision charged to expense

  94,940   115,739 

Less amounts charged-off

  (109,393)  (56,759)

Balance, ending

 $196,668  $252,444 
  

Six Months Ended (Continuing Operations)

 
  

May 31, 2024

  

May 31, 2023

 

Balance, beginning

 $295,113  $192,301 

Provision charged to expense

  178,676   231,335 

Less amounts charged-off

  (277,121)  (171,192)

Balance, ending

 $196,668  $252,444