Note 9 - Product Warranty (Tables)

12 Months Ended

Nov. 30, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Twelve Months Ended
	November 30, 2018			November 30, 2017
Balance, beginning	$	68,451		$	134,373
Settlements / adjustments		(233,316	)		(276,667	)
Warranties issued		261,651			210,745
Balance, ending	$	96,786		$	68,451