v3.26.1
Note 10 - Product Warranty (Tables)
6 Months Ended
May 31, 2026
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended

 
  

May 31, 2026

  

May 31, 2025

 

Balance, beginning

 $230,905  $190,831 

Provision charged to expense

  99,541   98,336 

Less amounts charged-off

  (152,785)  (75,238)

Balance, ending

 $177,661  $213,929 
  

Six Months Ended

 
  

May 31, 2026

  

May 31, 2025

 

Balance, beginning

 $225,000  $225,186 

Provision charged to expense

  177,480   183,376 

Less amounts charged-off

  (224,819)  (194,633)

Balance, ending

 $177,661  $213,929