Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2015	Jan. 31, 2014
Revenues (1):
Product sales	$ 33,418	$ 34,460
Service agreements and license revenues	3,871	4,960
Advanced technologies contract revenues	4,381	5,014
Total revenues	41,670	44,434
Costs of revenues:
Cost of product sales	30,348	33,028
Cost of service agreements and license revenues	3,568	4,157
Cost of advanced technologies contract revenues	3,740	5,050
Total costs of revenues	37,656	42,235
Gross profit	4,014	2,199
Operating expenses:
Administrative and selling expenses	5,640	4,854
Research and development expenses	3,504	4,915
Total costs and expenses	9,144	9,769
Loss from operations	(5,130)	(7,570)
Interest expense	(664)	(1,361)
Other income (expense), net	1,680	(1,774)
Loss before provision for income taxes	(4,114)	(10,705)
Provision for income taxes	(40)	(110)
Net Loss	(4,154)	(10,815)
Net loss attributable to noncontrolling interest	88	211
Net loss attributable to FuelCell Energy, Inc.	(4,066)	(10,604)
Preferred stock dividends	(800)	(800)
Net loss attributable to common shareholders	$ (4,866)	$ (11,404)
Loss per share basic and diluted
Net loss per share attributable to common shareholders	$ (0.02)	$ (0.06)
Weighted Average Number of Shares Outstanding, Basic and Diluted	285,584,931	200,637,819