XML 48 R30.htm IDEA: XBRL DOCUMENT v3.21.4
Note 6 - Product Warranties (Tables)
12 Months Ended
Oct. 31, 2021
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

Years ended October 31,

 
  

2021

  

2020

 

Balance at beginning of year

 $85,000  $120,000 

Liabilities accrued for warranties issued during the year

  74,555   140,847 

Warranty claims paid during the period

  (65,592)  (102,150)

Changes in liability for pre-existing warranties during the year

  (18,963)  (73,697)

Balance at end of year

 $75,000  $85,000