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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Mar. 31, 2014
INVENTORIES    
Raw materials, completed sub-assemblies, and spare parts $ 20,033 $ 18,482
Work-in-process 20,401 13,199
Finished goods 4,766 1,254
Total $ 45,200 $ 32,935