Note 7 - Product Warranty (Tables)

3 Months Ended

Feb. 28, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	February 28, 2017			February 29, 2016
Balance, beginning	$	134,373		$	176,531
Settlements / adjustments		(72,949	)		(81,292	)
Warranties issued		64,248			76,702
Balance, ending	$	125,672		$	171,941