Note 6 - Product Warranty (Tables)

6 Months Ended

May 31, 2014

Product Warranties Disclosures [Abstract]

Schedule of Product Warranty Liability [Table Text Block]

		For the three months ended
		May 31, 2014			May 31, 2013
Balance, beginning	$	153,455		$	575,330
Settlements made in cash or in-kind		(43,493	)		(212,374	)
Warranties issued		119,438			164,025
Balance, ending	$	229,400		$	526,981

	For the six months ended
	May 31, 2014			May 31, 2013
Balance, beginning	$	220,719		$	578,864
Settlements made in cash or in-kind		(195,070	)		(381,063	)
Warranties issued		203,751			329,180
Balance, ending	$	229,400		$	526,981