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Certain Financial Statement Information Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Mar. 31, 2014
Schedule of Inventories    
Finished goods $ 16,618us-gaap_InventoryFinishedGoodsNetOfReserves $ 9,375us-gaap_InventoryFinishedGoodsNetOfReserves
Work in process 6,494us-gaap_InventoryWorkInProcessNetOfReserves 6,510us-gaap_InventoryWorkInProcessNetOfReserves
Raw materials 1,110us-gaap_InventoryRawMaterialsNetOfReserves 3,061us-gaap_InventoryRawMaterialsNetOfReserves
Inventories, total $ 24,222us-gaap_InventoryNet $ 18,946us-gaap_InventoryNet