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6. INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2013
May 31, 2013
Inventories Details    
Raw materials and sub-assemblies $ 2,786 $ 3,180
Work-in-process 2,765 2,187
Finished goods 99 2
Inventory $ 5,650 $ 5,369 [1]
[1] The condensed consolidated balance sheet at May 31, 2013 has been derived from the audited consolidated financial statements at that date.