Note 8 - Product Warranty (Tables)

6 Months Ended

May 31, 2018

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Three Months Ended
	May 31, 2018			May 31, 2017
Balance, beginning	$	54,135		$	125,672
Settlements / adjustments		(58,892	)		(36,186	)
Warranties issued		75,973			63,478
Balance, ending	$	71,216		$	152,964

	For the Six Months Ended
	May 31, 2018			May 31, 2017
Balance, beginning	$	68,451		$	134,373
Settlements / adjustments		(141,565	)		(109,135	)
Warranties issued		144,330			127,726
Balance, ending	$	71,216		$	152,964