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6. INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Nov. 30, 2012
May 31, 2012
Inventories Details    
Raw materials and sub-assemblies $ 3,709 $ 3,218
Work-in-process 2,718 2,657
Finished goods 17 195
Inventory $ 6,444 $ 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.