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Components of Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Inventory [Line Items]    
Raw materials and supplies $ 6,534 $ 6,414
Work-in-progress 6,295 6,261
Finished goods 1,091 1,273
Inventories $ 13,920 $ 13,948