Note 8 - Product Warranty (Tables)

3 Months Ended

Feb. 28, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	February 28, 2018			February 28, 2017
Balance, beginning	$	68,451		$	134,373
Settlements / adjustments		(82,673	)		(72,949	)
Warranties issued		68,357			64,248
Balance, ending	$	54,135		$	125,672