Shareholders' Equity (Deficit) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended						12 Months Ended					3 Months Ended
	Apr. 30, 2012	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Dec. 20, 2012	Mar. 27, 2012	Jan. 31, 2011	Oct. 31, 2013 Common Stock [Member]	Oct. 31, 2012 Common Stock [Member]	Oct. 31, 2011 Common Stock [Member]	Oct. 31, 2012 Common Stock [Member]	Oct. 31, 2013 Common Stock [Member]	Jan. 31, 2013 POSCO Energy [Member]	Apr. 30, 2012 POSCO Energy [Member]	Oct. 31, 2013 NRG Energy [Member]
Stock Issued During Period, Shares, Acquisitions		3,526,764
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					61.00%
Stock Issued During Period, Shares, New Issues	23,000,000	4,295,800	2,012,506					4,295,800	45,012,306	24,064,924			20,000,000
Stock Issued During Period, Value, New Issues		$ 5,548	$ 64,003	$ 32,864				$ 1	$ 5	$ 2
Common stock issued relating to full exercise of an over allottment option						3,000,000
Price Per Share for New Common Stock Issuance	$ 1.50					$ 1.50
Common Stock, Par or Stated Value Per Share		$ 0.0001	$ 0.0001
Class of Warrant or Right, Exercise Price of Warrants or Rights		2.29													2.18
Proceeds from Issuance of Common Stock	$ 32,000	$ 5,040	$ 64,003	$ 32,930							$ 2,000	$ 5,600		$ 30,000
Common Stock, Capital Shares Reserved for Future Issuance		5,000,000													5,000,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights		5,000,000					10,200,000								5,000,000