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Other Balance Sheet Details (Schedule of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Other Balance Sheet Details [Abstract]    
Raw materials $ 5,493us-gaap_InventoryRawMaterialsNetOfReserves $ 4,434us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 24,299us-gaap_InventoryWorkInProcessNetOfReserves 15,618us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods 1,002us-gaap_InventoryFinishedGoodsNetOfReserves 6,245us-gaap_InventoryFinishedGoodsNetOfReserves
Inventory, net $ 30,794us-gaap_InventoryNet $ 26,297us-gaap_InventoryNet