Note 6 - Product Warranty (Tables)

6 Months Ended

May 31, 2016

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	May 31, 2016			May 31, 2015
Balance, beginning	$	178,978		$	246,490
Settlements / adjustments		(71,786	)		(78,611	)
Warranties issued		39,356			115,692
Balance, ending	$	146,548		$	283,571

	For the six months ended
	May 31, 2016			May 31, 2015
Balance, beginning	$	179,531		$	234,266
Settlements / adjustments		(153,078	)		(170,136	)
Warranties issued		120,095			219,441
Balance, ending	$	146,548		$	283,571