v3.26.3
Note 10 - Product Warranty (Tables)
9 Months Ended
Aug. 31, 2026
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Three Months Ended

 
  

August 31, 2026

  

August 31, 2025

 

Balance, beginning

 $177,661  $213,929 

Provision charged to expense

  35,089   77,334 

Less amounts charged-off

  (36,229)  (70,713)

Balance, ending

 $176,521  $220,550 
  

Nine Months Ended

 
  

August 31, 2026

  

August 31, 2025

 

Balance, beginning

 $225,000  $225,186 

Provision charged to expense

  212,569   260,709 

Less amounts charged-off

  (261,048)  (265,345)

Balance, ending

 $176,521  $220,550