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Inventories (Details) (USD $)
Jan. 31, 2015
Oct. 31, 2014
Inventory Disclosure [Abstract]    
Raw materials $ 28,962,000us-gaap_InventoryRawMaterialsNetOfReserves $ 25,460,000us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 27,658,000us-gaap_InventoryWorkInProcessNetOfReserves [1] 30,435,000us-gaap_InventoryWorkInProcessNetOfReserves [1]
Inventory, Net 56,620,000us-gaap_InventoryNet 55,895,000us-gaap_InventoryNet
Completed Standard Component $ 17,000,000fcel_CompletedStandardComponent $ 19,200,000fcel_CompletedStandardComponent
[1] Work-in-process includes the standard components of inventory used to build the typical modules or module components that are intended to be used in future power plant orders or to service our service agreements. Included in work-in-process as of January 31, 2015 and October 31, 2014 was $17.0 million and $19.2 million, respectively, of completed standard components.