Note 7 - Product Warranty

9 Months Ended

Aug. 31, 2016

Notes to Financial Statements

Product Warranty Disclosure [Text Block]

7) Product Warranty

The Company offers warranties of various lengths to its customers depending on the specific product and terms of the customer purchase agreement. The average length of the warranty period is one year from the date of purchase. The Company’s warranties require it to repair or replace defective products during the warranty period at no cost to the customer. The Company records a liability for estimated costs that may be incurred under its warranties. The costs are estimated based on historical experience and any specific warranty issues that have been identified. Although historical warranty costs have been within expectations, there can be no assurance that future warranty costs will not exceed historical amounts. The Company periodically assesses the adequacy of its recorded warranty liability and adjusts the balance as necessary. The accrued warranty balance is included in accrued expenses as shown in Note 6. Changes in the Company’s product warranty liability for the three and nine months ended August 31, 2016 and August 31, 2015 are as follows:

	For the three months ended
	August 31, 2016			August 31, 2015
Balance, beginning	$	140,674		$	274,375
Settlements / adjustments		(36,896	)		(60,346	)
Warranties issued		61,922			62,837
Balance, ending	$	165,700		$	276,866

	For the nine months ended
	August 31, 2016			August 31, 2015
Balance, beginning	$	176,531		$	230,766
Settlements / adjustments		(186,179	)		(230,482	)
Warranties issued		175,348			276,582
Balance, ending	$	165,700		$	276,866