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Note 6 Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Inventory Net [Abstract]    
Raw Materials $ 21,577us-gaap_InventoryRawMaterialsNetOfReserves $ 19,957us-gaap_InventoryRawMaterialsNetOfReserves
Work in Process 40,181us-gaap_InventoryWorkInProcessNetOfReserves 44,165us-gaap_InventoryWorkInProcessNetOfReserves
Finished Goods 27,382us-gaap_InventoryFinishedGoodsNetOfReserves 28,906us-gaap_InventoryFinishedGoodsNetOfReserves
Inventory Net, Total $ 89,140us-gaap_InventoryNet $ 93,028us-gaap_InventoryNet