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8. PRODUCT WARRANTIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Product Warranties Details
Balance at the beginning of the period	$ 115	$ 100	$ 91	$ 103
Accruals for warranties issued during the period	120	86	250	141
Settlement made during the period (in cash or in kind)	(61)	(57)	(167)	(115)
Balance at the end of the period	$ 174	$ 129	$ 174	$ 129

- 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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