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8. PRODUCT WARRANTIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Product Warranties Details
Balance at the beginning of the period	$ 91	$ 103
Accruals for warranties issued during the period	130	55
Settlement made during the period (in cash or in kind)	(106)	(58)
Balance at the end of the period	$ 115	$ 100

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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