Shareholders' Equity (Deficit) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014	Jul. 12, 2016
Common Stock, Shares Authorized	75,000,000	39,583,333
Stock Issued During Period, Value, New Issues	$ 36,056	$ 26,921	$ 105,966
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs	$ 2,600
Common Stock, Par or Stated Value Per Share	$ 0.0001	$ 0.0001
Common stock ownership percentage	4.99%
Proceeds from Issuance of Common Stock	$ 70,929	$ 27,060	$ 105,844
Common Stock, Capital Shares Reserved for Future Issuance	2,500,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	14,331,463	1,666,461
Common Stock [Member]
Common stock issued to settle make-whole obligation, shares			459,523
Stock Issued During Period, Shares, New Issues	6,023,372	1,845,166	4,973,604
Stock Issued During Period, Value, New Issues	$ 1	$ 1	$ 0
Common Stock [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	6,000,000	1,900,000
Proceeds from Issuance of Common Stock	$ 36,100	$ 26,900
POSCO Energy [Member]
Common stock ownership percentage	7.00%
NRG Energy [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 40.20
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	200,000
Series A Warrant [Member]
Warrants expired	0
Class of Warrant or Right, Outstanding	7,680,000			7,680,000
Common stock issued during period, warrants exercised	0
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 5.83
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	7,680,000	0
Series B Warrant [Member]
Warrants expired	0
Class of Warrant or Right, Outstanding	3,826,000			4,926,000
Common stock issued during period, warrants exercised	(1,100,000)
Common stock issued after period, warrants exercised	1,800,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.0001
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	3,826,000	0
NRG Energy, Inc. [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	166,666	166,666
Common Stock and Pre-Funded Warrants [Member]
Stock Issued During Period, Shares, New Issues	1,474,000
Stock Issued During Period, Value, New Issues	$ 34,700