Note 9 - Product Warranty (Tables)

3 Months Ended

Feb. 28, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Three Months Ended
	February 28, 2019			February 28, 2018
Balance, beginning	$	96,785		$	68,451
Settlements / adjustments		(132,297	)		(82,673	)
Warranties issued		61,369			68,357
Balance, ending	$	25,857		$	54,135