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Inventories, Net - Schedule of Inventories, Net (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventory Disclosure [Abstract]    
Raw materials $ 3,393us-gaap_InventoryRawMaterialsNetOfReserves $ 3,565us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 10,271us-gaap_InventoryWorkInProcessNetOfReserves 6,696us-gaap_InventoryWorkInProcessNetOfReserves
Finished products 3,199us-gaap_InventoryFinishedGoodsNetOfReserves 2,974us-gaap_InventoryFinishedGoodsNetOfReserves
Total $ 16,863us-gaap_InventoryNet $ 13,235us-gaap_InventoryNet