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Note 11 - Product Warranty (Tables)
3 Months Ended
Feb. 29, 2024
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended (Continuing operations)

 
  

February 29, 2024

  

February 28, 2023

 

Balance, beginning

 $295,113  $192,301 

Provision charged to expense

  83,735   115,596 

Less amounts charged-off

  (167,728)  (114,433)

Balance, ending

 $211,120  $193,464