Note 9 - Product Warranty (Tables)

6 Months Ended

May 31, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Three Months Ended
	May 31, 2019			May 31, 2018
Balance, beginning	$	25,857		$	54,135
Settlements / adjustments		(62,640	)		(58,892	)
Warranties issued		126,420			75,973
Balance, ending	$	89,637		$	71,216

	For the Six Months Ended
	May 31, 2019			May 31, 2018
Balance, beginning	$	96,786		$	68,451
Settlements / adjustments		(194,938	)		(141,565	)
Warranties issued		187,789			144,330
Balance, ending	$	89,637		$	71,216