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Earnings Per Share
 12 Months Ended
Oct. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Note 16. Earnings Per Share
Basic earnings (loss) per common share (“EPS”) are generally calculated as income (loss) available to common shareholders divided by the weighted average number of common shares outstanding. Diluted EPS is generally calculated as income (loss) available to common shareholders divided by the weighted average number of common shares outstanding plus the dilutive effect of common share equivalents.
The calculation of basic and diluted EPS for the years ended October 31, 2013, 2012 and 2011 was as follows:
 
 
2013
 
2012
 
2011
Numerator
 
 
 
 
 
 
Net loss
 
$
(35,319
)
 
$
(35,906
)
 
$
(45,974
)
Net loss attributable to noncontrolling interest
 
961

 
411

 
261

Adjustment for modification of redeemable preferred stock of subsidiary
 
—

 
—

 
(8,987
)
Preferred stock dividend
 
(3,200
)
 
(3,201
)
 
(3,200
)
Net loss to common shareholders
 
$
(37,558
)
 
$
(38,696
)
 
$
(57,900
)
Denominator
 
 
 
 
 
 
Weighted average basic common shares
 
186,525,001

 
165,471,261

 
124,498,073

   Effect of dilutive securities (1)
 
—

 
—

 
—

Weighted average diluted common shares
 
186,525,001

 
165,471,261

 
124,498,073

   Basic loss per share
 
(0.20
)
 
(0.23
)
 
(0.47
)
   Diluted loss per share (1)
 
(0.20
)
 
(0.23
)
 
(0.47
)
(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.