Note 6 - Product Warranties (Tables)

12 Months Ended

Oct. 31, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Years ended October 31,
	2019			2018
Balance at beginning of year	$	180,000		$	180,000
Liabilities accrued for warranties issued during the year		161,815			266,258
Warranty claims paid during the period		(218,426	)		(219,190	)
Changes in liability for pre-existing warranties during the year		(3,389	)		(47,068	)
Balance at end of year	$	120,000		$	180,000