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Loss Per Share
 6 Months Ended
Apr. 30, 2013
Earnings Per Share [Abstract]  
Loss Per Share
Loss Per Share
The calculation of basic and diluted loss per share was as follows:
 
Three Months Ended April 30,
 
Six Months Ended April 30,
 
2013
 
2012
 
2013
 
2012
Numerator
 
 
 
 
 
 
 
Net loss
$
(7,629
)
 
$
(8,363
)
 
$
(19,508
)
 
$
(14,377
)
Net loss attributable to noncontrolling interest
264

 
71

 
462

 
142

Preferred stock dividend
(800
)
 
(801
)
 
(1,600
)
 
(1,601
)
Net loss attributable to common shareholders
$
(8,165
)
 
$
(9,093
)
 
$
(20,646
)
 
$
(15,836
)
Denominator
 
 
 
 
 
 
 
Weighted average basic common shares
190,431,554

 
150,013,074

 
188,968,577

 
144,830,437

Effect of dilutive securities (1)
—

 
—

 
—

 
—

Weighted average diluted common shares
190,431,554

 
150,013,074

 
188,968,577

 
144,830,437

Basic loss per share
$
(0.04
)
 
$
(0.06
)
 
$
(0.11
)
 
$
(0.11
)
              Diluted loss per share (1)
$
(0.04
)
 
$
(0.06
)
 
$
(0.11
)
 
$
(0.11
)
 
(1)
Diluted loss per share was computed without consideration to potentially dilutive instruments as their inclusion would have been antidilutive. Potentially dilutive instruments include stock options and convertible preferred stock. At April 30, 2013 and 2012, there were options to purchase 3.2 million and 3.3 million, respectively, shares of common stock. Refer to our Annual Report on Form 10-K for the year ended October 31, 2012 for information on our convertible preferred stock.