Note 7 - Product Warranty (Tables)

9 Months Ended

Aug. 31, 2016

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	August 31, 2016			August 31, 2015
Balance, beginning	$	140,674		$	274,375
Settlements / adjustments		(36,896	)		(60,346	)
Warranties issued		61,922			62,837
Balance, ending	$	165,700		$	276,866

	For the nine months ended
	August 31, 2016			August 31, 2015
Balance, beginning	$	176,531		$	230,766
Settlements / adjustments		(186,179	)		(230,482	)
Warranties issued		175,348			276,582
Balance, ending	$	165,700		$	276,866