XML 32 R21.htm IDEA: XBRL DOCUMENT v3.7.0.1
Note 5 - Product Warranties (Tables)
9 Months Ended
Jul. 31, 2017
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
 
 
Nine Months Ended
 
 
 
July 31,
 
 
 
2017
 
 
2016
 
Balance at beginning of period
  $
70,000
    $
130,000
 
Liabilities accrued for warranties issued during the period
   
176,113
     
117,437
 
Warranty claims and costs paid during the period
   
(93,565
)    
(112,724
)
Changes in liability for pre-existing warranties during the period
   
2,452
     
(59,713
)
Balance at end of period
  $
155,000
    $
75,000