14. RELATED PARTY TRANSACTIONS (Details Narrative) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Related Party Transactions Details Narrative
Interest percentage owned ESA Electronics Pte Ltd.			12.50%
Payable to Wilson Sonsini Goodrich & Rosati	$ 60
Gain on sale of long-term investment	0	990	0
Proceeds from sale of long-term investment	$ 0	$ 1,375	$ 0