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Note 9 - Product Warranty (Tables)
3 Months Ended
Feb. 28, 2023
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

For the Three Months Ended

 
   

February 28, 2023

   

February 28, 2022

 

Balance, beginning

  $ 193,301     $ 202,850  

Settlements / adjustments

    115,596       21,624  

Warranties issued

    (114,433 )     (109,412 )

Balance, ending

  $ 194,464     $ 115,062