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8. PRODUCT WARRANTIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2013	Feb. 29, 2012
Product Warranties Details
Balance at the beginning of the period	$ 174	$ 129	$ 91	$ 103
Accruals for warranties issued during the period	162	35	412	176
Settlement made during the period (in cash or in kind)	(139)	(52)	(306)	(167)
Balance at the end of the period	$ 197	$ 112	$ 197	$ 112

- 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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