Note 5 - Product Warranties (Tables)

9 Months Ended

Jul. 31, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Nine Months Ended
	July 31,
	2018			2017
Balance at beginning of period	$	180,000		$	70,000
Liabilities accrued for warranties issued during the period		165,269			176,113
Warranty claims and costs paid during the period		(157,377	)		(93,565	)
Changes in liability for pre-existing warranties during the period		(22,892	)		2,452
Balance at end of period	$	165,000		$	155,000