Note 7 - Product Warranty (Tables)

6 Months Ended

May 31, 2017

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	May 31, 2017			May 31, 2016
Balance, beginning	$	125,672		$	178,978
Settlements / adjustments		(36,186	)		(71,786	)
Warranties issued		63,478			39,356
Balance, ending	$	152,964		$	146,548

	For the six months ended
	May 31, 2017			May 31, 2016
Balance, beginning	$	134,373		$	179,531
Settlements / adjustments		(109,135	)		(153,078	)
Warranties issued		127,726			120,095
Balance, ending	$	152,964		$	146,548