Note 5 - Product Warranties (Tables)

3 Months Ended

Jan. 31, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Three Months Ended
	January 31,
	2017			2016
Balance at beginning of period	$	70,000		$	130,000
Liabilities accrued for warranties issued during the period		71,161			73,968
Warranty claims and costs paid during the period		(32,855	)		(52,730	)
Changes in liability for pre-existing warranties during the period		(23,306	)		(61,238	)
Balance at end of period	$	85,000		$	90,000