Note 9 - Product Warranty (Tables)

12 Months Ended

Nov. 30, 2019

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	Twelve Months Ended
	November 30, 2019			November 30, 2018
Balance, beginning	$	96,786		$	68,451
Settlements / adjustments		(279,992	)		(233,316	)
Warranties issued		386,391			261,651
Balance, ending	$	203,185		$	96,786