Note 9 - Product Warranty (Tables)

6 Months Ended

May 31, 2020

Notes Tables

Schedule of Product Warranty Liability [Table Text Block]

	For the Three Months Ended
	May 31, 2020			May 31, 2019
Balance, beginning	$	239,233		$	25,857
Settlements / adjustments		(37,146	)		(62,640	)
Warranties issued		66,146			126,420
Balance, ending	$	268,233		$	89,637

	For the Six Months Ended
	May 31, 2020			May 31, 2019
Balance, beginning	$	203,185		$	96,786
Settlements / adjustments		(65,722	)		(194,938	)
Warranties issued		130,770			187,789
Balance, ending	$	268,233		$	89,637