Note 9 - Product Warranty (Tables)

9 Months Ended

Aug. 31, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Three Months Ended
	August 31, 2019			August 31, 2018
Balance, beginning	$	89,637		$	71,216
Settlements / adjustments		(42,691	)		(73,108	)
Warranties issued		93,889			73,155
Balance, ending	$	140,835		$	71,263

	For the Nine Months Ended
	August 31, 2019			August 31, 2018
Balance, beginning	$	96,786		$	68,452
Settlements / adjustments		(237,629	)		(214,674	)
Warranties issued		281,678			217,485
Balance, ending	$	140,835		$	71,263