Note 6 - Product Warranty (Tables)

3 Months Ended

Feb. 28, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

	For the three months ended
	February 28, 2014			February 28, 2013
Balance, beginning	$	220,719		$	578,864
Settlements made in cash or in-kind		(151,577	)		(168,689	)
Warranties issued		84,313			165,155
Balance, ending	$	153,455		$	575,330