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6. INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Feb. 28, 2013
May 31, 2012
Inventories Details    
Raw materials and sub-assemblies $ 2,843 $ 3,218
Work in process 2,879 2,657
Finished goods 0 195
Inventory $ 5,722 $ 6,070 [1]
[1] The condensed consolidated balance sheet at May 31, 2012 has been derived from the audited consolidated financial statements at that date.