Note 6 - Product Warranty (Tables)

9 Months Ended

Aug. 31, 2012

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	August 31, 2012			August 31, 2011
Balance, beginning	$	277,965		$	199,395
Settlements made in cash or in-kind		(94,065	)		(123,457	)
Warranties issued		313,898			174,845
Balance, ending	$	497,798		$	250,783

	For the nine months ended
	August 31, 2012			August 31, 2011
Balance, beginning	$	201,630		$	180,549
Settlements made in cash or in-kind		(270,784	)		(315,621	)
Warranties issued		566,952			385,855
Balance, ending	$	497,798		$	250,783