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Loss Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Oct. 31, 2013 | Jul. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2013 | Oct. 31, 2012 | Jul. 31, 2012 | Apr. 30, 2012 | Jan. 31, 2012 | Oct. 31, 2013 | Oct. 31, 2012 | Oct. 31, 2011 | Jan. 31, 2011
Numerator [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (9,997) | $ (5,814) | $ (7,629) | $ (11,879) | $ (11,519) | $ (10,010) | $ (8,363) | $ (6,014) | $ (35,319) |  | $ (35,906) |  | $ (45,974) |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  | 961 |  | 411 |  | 261 |  |
Adjustment for Modification of Redeemable Preferred Stock of Subsidiary |  |  |  |  |  |  |  | 0 | 0 |  | 0 |  | (8,987) |  |
Dividends, Preferred Stock | (800) | (800) | (800) | (800) | (800) | (800) | (801) | (800) | (3,200) |  | (3,201) |  | (3,200) |  |
Net loss to common shareholders | $ (10,500) | $ (6,412) | $ (8,165) | $ (12,481) | $ (12,138) | $ (10,722) | $ (9,093) | $ (6,743) | $ (37,558) |  | $ (38,696) |  | $ (57,900) |  |
Demoninator [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Number of Shares Outstanding, Basic |  |  |  |  |  |  |  |  | 186,525,001 |  | 165,471,261 |  | 124,498,073 |  |
Weighted Average Number Diluted Shares Outstanding Adjustment |  |  |  |  |  |  |  |  | 0 | [1] | 0 | [1] | 0 | [1] |
Weighted Average Number of Shares Outstanding, Diluted |  |  |  |  |  |  |  | 165,471,261 | 186,525,001 |  | 165,471,261 |  | 124,498,073 |  |
Earnings Per Share, Basic |  |  |  |  |  |  |  |  | $ (0.20) |  | $ (0.23) |  | $ (0.47) |  |
Earnings Per Share, Diluted |  |  |  |  |  |  |  |  | $ (0.20) | [1] | $ (0.23) | [1] | $ (0.47) | [1] |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 3,181,464 |  |  |  | 3,120,456 |  |  |  | 3,181,464 |  | 3,120,456 |  | 3,300,000 |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 5,000,000 |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  | 10,200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | 2.29 |  |  |  |  |  |  |  | 2.29 |  |  |  |  |  |
[1] | Due to the net loss to common shareholders in each of the years presented above, diluted earnings per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. Potentially dilutive instruments include stock options, warrants, convertible preferred stock and convertible notes. At October 31, 2013, 2012 and 2011, there were options to purchase 3.2 million, 3.1 million and 3.3 million shares of common stock, respectively. On September 4, 2013, the Company entered into a co-marketing agreement with NRG for the marketing and sales of the Company's power plants which include the issuance of warrants to purchase up to 5.0 million shares of the Company's common stock. On January 13, 2011 we issued 10.2 million warrants in connection with a registered direct offering. Each warrant was exercisable for 1 share of common stock. The warrants had an exercise price of $2.29 per share and were exercisable beginning six months and one day after the initial closing date and expired in the fourth quarter of 2012.

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